[Gluster-users] Slow read performance

Thomas Wakefield twake at cola.iges.org
Mon Mar 11 16:02:24 UTC 2013


Is there a way to make a ramdisk support extended attributes?

These are my current sysctl settings (and I have tried many different options):
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
kernel.panic = 5
net.core.rmem_max = 67108864
net.core.wmem_max = 67108864
net.ipv4.tcp_rmem = 4096 87380 67108864
net.ipv4.tcp_wmem = 4096 65536 67108864
net.core.netdev_max_backlog = 250000
net.ipv4.tcp_congestion_control = htcp
net.ipv4.tcp_mtu_probing = 1


Here is the output from a dd write and dd read.

[root at cpu_crew1 ~]# dd if=/dev/zero of=/shared/working/benchmark/test.cpucrew1 bs=512k count=10000 ; dd if=/shared/working/benchmark/test.cpucrew1 of=/dev/null bs=512k
10000+0 records in
10000+0 records out
5242880000 bytes (5.2 GB) copied, 7.21958 seconds, 726 MB/s
10000+0 records in
10000+0 records out
5242880000 bytes (5.2 GB) copied, 86.4165 seconds, 60.7 MB/s

[root at disk2 ~]# gluster volume profile shared info
Brick: fs-disk2:/storage/disk2g
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     2 
No. of Writes:                   20                    35                  6331 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                   12                     1                     6 
No. of Writes:                31681               1224295                   161 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   34                    35                   314 
No. of Writes:                  163                   234                   539 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  165                   616                  1286 
No. of Writes:                  904                  2081                 30248 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                66206               1228556                 92209 
No. of Writes:              6973257              42743609               5711989 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                65742                 75482              29711040 
No. of Writes:              3521861               1512528              13722755 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          45836      FORGET
      0.00       0.00 us       0.00 us       0.00 us         239256     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.42     281.00 us     281.00 us     281.00 us              1        STAT
      2.64     145.75 us      30.00 us     572.00 us             12     OPENDIR
     15.16     772.92 us     277.00 us    1186.00 us             13      STATFS
     81.78    2356.26 us      64.00 us   39949.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3915245128069 bytes
Data Written: 2653770269732 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     2 
No. of Writes:                   20                    35                  6331 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                   12                     1                     6 
No. of Writes:                31681               1224295                   161 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   34                    35                   314 
No. of Writes:                  163                   234                   539 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  165                   616                  1286 
No. of Writes:                  904                  2081                 30248 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                66206               1228556                 92209 
No. of Writes:              6973257              42743609               5711989 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                65742                 75482              29711040 
No. of Writes:              3521861               1512528              13722755 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          45836      FORGET
      0.00       0.00 us       0.00 us       0.00 us         239256     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.42     281.00 us     281.00 us     281.00 us              1        STAT
      2.64     145.75 us      30.00 us     572.00 us             12     OPENDIR
     15.16     772.92 us     277.00 us    1186.00 us             13      STATFS
     81.78    2356.26 us      64.00 us   39949.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3915245128069 bytes
Data Written: 2653770269732 bytes
 
Brick: fs-disk2:/storage/disk2h
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                   10                    32                  2246 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    2                     1                     7 
No. of Writes:                14532               1324118                   138 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   27                    30                   320 
No. of Writes:                  139                   238                   512 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  285                  1353                  1582 
No. of Writes:                  744                  3796                 40897 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                36625                665635                 56092 
No. of Writes:              8987796              50778993               6891891 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                46596                 62818              30538792 
No. of Writes:              3564231               1690585              15524821 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          44650      FORGET
      0.00       0.00 us       0.00 us       0.00 us         224762     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.07      70.00 us      70.00 us      70.00 us              1        STAT
      1.08      93.08 us      38.00 us     194.00 us             12     OPENDIR
      8.59     680.85 us     277.00 us    1245.00 us             13      STATFS
     90.26    4042.70 us      64.00 us   90228.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4016932217957 bytes
Data Written: 3028611159470 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                   10                    32                  2246 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    2                     1                     7 
No. of Writes:                14532               1324118                   138 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   27                    30                   320 
No. of Writes:                  139                   238                   512 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  285                  1353                  1582 
No. of Writes:                  744                  3796                 40897 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                36625                665635                 56092 
No. of Writes:              8987796              50778993               6891891 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                46596                 62818              30538792 
No. of Writes:              3564231               1690585              15524821 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          44650      FORGET
      0.00       0.00 us       0.00 us       0.00 us         224762     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.07      70.00 us      70.00 us      70.00 us              1        STAT
      1.08      93.08 us      38.00 us     194.00 us             12     OPENDIR
      8.59     680.85 us     277.00 us    1245.00 us             13      STATFS
     90.26    4042.70 us      64.00 us   90228.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4016932217957 bytes
Data Written: 3028611159470 bytes
 
Brick: fs-disk2:/storage/disk2q
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     8 
No. of Writes:                   17                    17                    66 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    6                     8                    25 
No. of Writes:              1374671                   186                   194 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   72                   442                   116 
No. of Writes:                 2462                   600                   930 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  575                  1042                 65613 
No. of Writes:                 6338                  9129              10297439 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:              1231874                 91724                 62974 
No. of Writes:             45897801               7596377               3383890 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                68721              31115020 
No. of Writes:              1628168              14997024 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          32635      FORGET
      0.00       0.00 us       0.00 us       0.00 us         220295     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.00      19.00 us      19.00 us      19.00 us              1       FLUSH
      0.00      25.00 us      25.00 us      25.00 us              1        STAT
      0.00      31.00 us      31.00 us      31.00 us              1       FSTAT
      0.01      83.17 us      30.00 us     193.00 us             12     OPENDIR
      0.07     708.46 us     311.00 us    1598.00 us             13      STATFS
      0.59    3486.70 us      44.00 us   77044.00 us             23      LOOKUP
     99.33    2393.23 us      16.00 us  111841.00 us           5604        READ
 
    Duration: 1986036 seconds
   Data Read: 4098599948827 bytes
Data Written: 2934296167395 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     8 
No. of Writes:                   17                    17                    66 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    6                     8                    25 
No. of Writes:              1374671                   186                   194 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   72                   442                   116 
No. of Writes:                 2462                   600                   930 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  575                  1042                 65613 
No. of Writes:                 6338                  9129              10297439 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:              1231874                 91724                 62974 
No. of Writes:             45897801               7596377               3383890 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                68721              31115020 
No. of Writes:              1628168              14997024 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          32635      FORGET
      0.00       0.00 us       0.00 us       0.00 us         220295     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.00      19.00 us      19.00 us      19.00 us              1       FLUSH
      0.00      25.00 us      25.00 us      25.00 us              1        STAT
      0.00      31.00 us      31.00 us      31.00 us              1       FSTAT
      0.01      83.17 us      30.00 us     193.00 us             12     OPENDIR
      0.07     708.46 us     311.00 us    1598.00 us             13      STATFS
      0.59    3486.70 us      44.00 us   77044.00 us             23      LOOKUP
     99.33    2393.23 us      16.00 us  111841.00 us           5604        READ
 
    Duration: 1986036 seconds
   Data Read: 4098599948827 bytes
Data Written: 2934296167395 bytes
 
Brick: fs-disk2:/storage/disk2v
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     4 
No. of Writes:                   76                    82                  2263 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    8                     7                    21 
No. of Writes:                  776               1276660                   472 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   33                    50                   278 
No. of Writes:                  412                  1268                   793 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  109                   309                   804 
No. of Writes:                 1128                  3946                  9187 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                31227                526511                 49389 
No. of Writes:              8508834              40471184               7221907 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                39915                 52502              31497648 
No. of Writes:              3628832               2605591              16727412 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          69158      FORGET
      0.00       0.00 us       0.00 us       0.00 us         758156     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335452  RELEASEDIR
      0.07      84.00 us      84.00 us      84.00 us              1        STAT
      0.68      64.83 us      30.00 us     192.00 us             12     OPENDIR
      9.64     850.00 us     356.00 us    1794.00 us             13      STATFS
     89.61    4465.26 us      58.00 us  100071.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4140191390006 bytes
Data Written: 3197280002013 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     4 
No. of Writes:                   76                    82                  2263 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    8                     7                    21 
No. of Writes:                  776               1276660                   472 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   33                    50                   278 
No. of Writes:                  412                  1268                   793 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  109                   309                   804 
No. of Writes:                 1128                  3946                  9187 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                31227                526511                 49389 
No. of Writes:              8508834              40471184               7221907 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                39915                 52502              31497648 
No. of Writes:              3628832               2605591              16727412 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          69158      FORGET
      0.00       0.00 us       0.00 us       0.00 us         758156     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335452  RELEASEDIR
      0.07      84.00 us      84.00 us      84.00 us              1        STAT
      0.68      64.83 us      30.00 us     192.00 us             12     OPENDIR
      9.64     850.00 us     356.00 us    1794.00 us             13      STATFS
     89.61    4465.26 us      58.00 us  100071.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4140191390006 bytes
Data Written: 3197280002013 bytes
 
Brick: fs-disk2:/storage/disk2t
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     6 
No. of Writes:                   14                  1689                    54 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    2                    15                    33 
No. of Writes:               647495                   101                   155 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   33                   327                   139 
No. of Writes:                 1531                   668                  1939 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  742                  1025                 45656 
No. of Writes:                 1334                  9233              11018359 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               827151                 63253                 47699 
No. of Writes:             43612138               7285204               3582392 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                55855              30729346 
No. of Writes:              1106904              14289709 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          48562      FORGET
      0.00       0.00 us       0.00 us       0.00 us         296118     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335467  RELEASEDIR
      0.18      90.00 us      90.00 us      90.00 us              1        STAT
      1.68      70.58 us      33.00 us     120.00 us             12     OPENDIR
     18.04     699.46 us     356.00 us    1689.00 us             13      STATFS
     80.10    1755.22 us      48.00 us   30037.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4042566814850 bytes
Data Written: 2740415347513 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     6 
No. of Writes:                   14                  1689                    54 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    2                    15                    33 
No. of Writes:               647495                   101                   155 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   33                   327                   139 
No. of Writes:                 1531                   668                  1939 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  742                  1025                 45656 
No. of Writes:                 1334                  9233              11018359 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               827151                 63253                 47699 
No. of Writes:             43612138               7285204               3582392 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                55855              30729346 
No. of Writes:              1106904              14289709 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          48562      FORGET
      0.00       0.00 us       0.00 us       0.00 us         296118     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335467  RELEASEDIR
      0.18      90.00 us      90.00 us      90.00 us              1        STAT
      1.68      70.58 us      33.00 us     120.00 us             12     OPENDIR
     18.04     699.46 us     356.00 us    1689.00 us             13      STATFS
     80.10    1755.22 us      48.00 us   30037.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4042566814850 bytes
Data Written: 2740415347513 bytes
 
Brick: fs-disk2:/storage/disk2w
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    1                     0                     0 
No. of Writes:                    1                    25                  4611 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    8                     0                     5 
No. of Writes:                14778               1007095                   214 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   17                    25                   215 
No. of Writes:                 1579                   902                   590 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                   88                   268                   839 
No. of Writes:                  627                  3397                 30790 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                29913                497020                 44552 
No. of Writes:              7681162              40100903               5305584 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                38631                 46410              29855714 
No. of Writes:              3106123               1432531              23341972 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          59919      FORGET
      0.00       0.00 us       0.00 us       0.00 us         289226     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335467  RELEASEDIR
      0.12     112.00 us     112.00 us     112.00 us              1        STAT
      0.68      53.58 us      29.00 us     109.00 us             12     OPENDIR
     10.83     790.92 us     304.00 us    2093.00 us             13      STATFS
     88.38    3648.91 us      49.00 us   81427.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3924075139505 bytes
Data Written: 3854579862798 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    1                     0                     0 
No. of Writes:                    1                    25                  4611 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    8                     0                     5 
No. of Writes:                14778               1007095                   214 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   17                    25                   215 
No. of Writes:                 1579                   902                   590 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                   88                   268                   839 
No. of Writes:                  627                  3397                 30790 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                29913                497020                 44552 
No. of Writes:              7681162              40100903               5305584 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                38631                 46410              29855714 
No. of Writes:              3106123               1432531              23341972 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          59919      FORGET
      0.00       0.00 us       0.00 us       0.00 us         289225     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335467  RELEASEDIR
      0.12     112.00 us     112.00 us     112.00 us              1        STAT
      0.68      53.58 us      29.00 us     109.00 us             12     OPENDIR
     10.83     790.92 us     304.00 us    2093.00 us             13      STATFS
     88.38    3648.91 us      49.00 us   81427.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3924075139505 bytes
Data Written: 3854579862798 bytes
 
Brick: fs-disk2:/storage/disk2o
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     1 
No. of Writes:                   32                  3309                 21858 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    4                     1                    17 
No. of Writes:              1158026                   239                   203 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   26                   353                    57 
No. of Writes:                 1637                   492                   601 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  263                   806                 51857 
No. of Writes:                 3491                 13944               6771528 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               966761                 74162                 56167 
No. of Writes:             46972247               5711679               3569591 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                63886              28210167 
No. of Writes:              1507101              11692443 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          63359      FORGET
      0.00       0.00 us       0.00 us       0.00 us         286551     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335473  RELEASEDIR
      0.15     145.00 us     145.00 us     145.00 us              1        STAT
      0.78      64.25 us      26.00 us     120.00 us             12     OPENDIR
      8.99     684.54 us     275.00 us    1563.00 us             13      STATFS
     90.08    3876.26 us      67.00 us   70115.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3714770261739 bytes
Data Written: 2433168135741 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     1 
No. of Writes:                   32                  3309                 21858 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    4                     1                    17 
No. of Writes:              1158026                   239                   203 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   26                   353                    57 
No. of Writes:                 1637                   492                   601 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  263                   806                 51857 
No. of Writes:                 3491                 13944               6771528 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               966761                 74162                 56167 
No. of Writes:             46972247               5711679               3569591 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                63886              28210167 
No. of Writes:              1507101              11692443 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          63359      FORGET
      0.00       0.00 us       0.00 us       0.00 us         286551     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335473  RELEASEDIR
      0.15     145.00 us     145.00 us     145.00 us              1        STAT
      0.78      64.25 us      26.00 us     120.00 us             12     OPENDIR
      8.99     684.54 us     275.00 us    1563.00 us             13      STATFS
     90.08    3876.26 us      67.00 us   70115.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3714770261739 bytes
Data Written: 2433168135741 bytes
 
Brick: fs-disk2:/storage/disk2u
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     7 
No. of Writes:                   25                 24297                 61424 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    2                     6                    14 
No. of Writes:               980690                   242                   271 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   22                   470                   122 
No. of Writes:                  918                   498                   702 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  692                  1233                 20426 
No. of Writes:                 4092                 17595               8297742 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               306285                 33094                 36653 
No. of Writes:             40734552               5320245               3384446 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                47884              29929679 
No. of Writes:              1261085              23614808 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          36356      FORGET
      0.00       0.00 us       0.00 us       0.00 us         235964     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335452  RELEASEDIR
      0.00      35.00 us      35.00 us      35.00 us              1        STAT
      0.00      19.00 us      15.00 us      23.00 us              2       FLUSH
      0.00      42.00 us      42.00 us      42.00 us              1     SETATTR
      0.00      83.50 us      44.00 us     123.00 us              2        OPEN
      0.00      70.92 us      32.00 us     116.00 us             12     OPENDIR
      0.05     701.00 us     296.00 us    1545.00 us             13      STATFS
      0.96    7538.16 us      52.00 us  128086.00 us             25      LOOKUP
     22.21 4371915.00 us 4371915.00 us 4371915.00 us              1    TRUNCATE
     23.06     113.42 us      15.00 us    3034.00 us          40030        READ
     53.73     264.45 us      97.00 us  105894.00 us          40000       WRITE
 
    Duration: 1986036 seconds
   Data Read: 3932182878499 bytes
Data Written: 3897490217239 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     7 
No. of Writes:                   25                 24297                 61424 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    2                     6                    14 
No. of Writes:               980690                   242                   271 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   22                   470                   122 
No. of Writes:                  918                   498                   702 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  692                  1233                 20426 
No. of Writes:                 4092                 17595               8297742 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               306285                 33094                 36653 
No. of Writes:             40734552               5320245               3384446 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                47884              29929679 
No. of Writes:              1261085              23614808 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          36356      FORGET
      0.00       0.00 us       0.00 us       0.00 us         235964     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335452  RELEASEDIR
      0.00      35.00 us      35.00 us      35.00 us              1        STAT
      0.00      19.00 us      15.00 us      23.00 us              2       FLUSH
      0.00      42.00 us      42.00 us      42.00 us              1     SETATTR
      0.00      83.50 us      44.00 us     123.00 us              2        OPEN
      0.00      70.92 us      32.00 us     116.00 us             12     OPENDIR
      0.05     701.00 us     296.00 us    1545.00 us             13      STATFS
      0.96    7538.16 us      52.00 us  128086.00 us             25      LOOKUP
     22.21 4371915.00 us 4371915.00 us 4371915.00 us              1    TRUNCATE
     23.06     113.42 us      15.00 us    3034.00 us          40030        READ
     53.73     264.45 us      97.00 us  105894.00 us          40000       WRITE
 
    Duration: 1986036 seconds
   Data Read: 3932182878499 bytes
Data Written: 3897490217239 bytes
 
Brick: fs-disk2:/storage/disk2p
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     5 
No. of Writes:                    2                    31                  6494 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    5                     1                     7 
No. of Writes:                31270               1410945                   215 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   18                    82                   305 
No. of Writes:                  275                   894                   598 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                   93                   342                  1011 
No. of Writes:                  642                  6170                 45584 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                38805                689118                 55529 
No. of Writes:              6451465              43176016               8441769 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                46299                 53069              31432059 
No. of Writes:              3454401               1692618              17475572 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          60570      FORGET
      0.00       0.00 us       0.00 us       0.00 us         241838     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.04      56.00 us      56.00 us      56.00 us              1        STAT
      1.06     133.83 us      24.00 us     661.00 us             12     OPENDIR
      6.68     781.31 us     299.00 us    2241.00 us             13      STATFS
     92.22    6094.22 us      54.00 us  123993.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4133248604192 bytes
Data Written: 3235536161348 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     5 
No. of Writes:                    2                    31                  6494 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    5                     1                     7 
No. of Writes:                31270               1410945                   215 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   18                    82                   305 
No. of Writes:                  275                   894                   598 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                   93                   342                  1011 
No. of Writes:                  642                  6170                 45584 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                38805                689118                 55529 
No. of Writes:              6451465              43176016               8441769 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                46299                 53069              31432059 
No. of Writes:              3454401               1692618              17475572 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          60570      FORGET
      0.00       0.00 us       0.00 us       0.00 us         241838     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.04      56.00 us      56.00 us      56.00 us              1        STAT
      1.06     133.83 us      24.00 us     661.00 us             12     OPENDIR
      6.68     781.31 us     299.00 us    2241.00 us             13      STATFS
     92.22    6094.22 us      54.00 us  123993.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4133248604192 bytes
Data Written: 3235536161348 bytes
 
Brick: fs-disk2:/storage/disk2l
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                    1                     8                  9009 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    2                     1                     4 
No. of Writes:                44135               1490959                    37 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   22                    31                   544 
No. of Writes:                   82                   942                   424 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  174                   579                   896 
No. of Writes:                  449                   878                 18783 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                36095                667458                 60986 
No. of Writes:              7779558              48360336               6948692 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                55504                 74463              31421258 
No. of Writes:              3488854               1733753              12896511 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          52642      FORGET
      0.00       0.00 us       0.00 us       0.00 us         233089     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.04      33.00 us      33.00 us      33.00 us              1        STAT
      0.09      83.00 us      83.00 us      83.00 us              1       FLUSH
      0.14     123.00 us     123.00 us     123.00 us              1      UNLINK
      1.27      95.50 us      32.00 us     220.00 us             12     OPENDIR
     12.48     864.92 us     319.00 us    1918.00 us             13      STATFS
     85.98    3227.00 us      60.00 us   73688.00 us             24      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4134086460445 bytes
Data Written: 2658148435749 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                    1                     8                  9009 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    2                     1                     4 
No. of Writes:                44135               1490959                    37 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   22                    31                   544 
No. of Writes:                   82                   942                   424 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  174                   579                   896 
No. of Writes:                  449                   878                 18783 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                36095                667458                 60986 
No. of Writes:              7779558              48360336               6948692 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                55504                 74463              31421258 
No. of Writes:              3488854               1733753              12896511 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          52642      FORGET
      0.00       0.00 us       0.00 us       0.00 us         233089     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.04      33.00 us      33.00 us      33.00 us              1        STAT
      0.09      83.00 us      83.00 us      83.00 us              1       FLUSH
      0.14     123.00 us     123.00 us     123.00 us              1      UNLINK
      1.27      95.50 us      32.00 us     220.00 us             12     OPENDIR
     12.48     864.92 us     319.00 us    1918.00 us             13      STATFS
     85.98    3227.00 us      60.00 us   73688.00 us             24      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4134086460445 bytes
Data Written: 2658148435749 bytes
 
Brick: fs-disk2:/storage/disk2k
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     2 
No. of Writes:                    2                    32                    15 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    8                     0                    20 
No. of Writes:                  126               1354976                   230 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   23                    43                   436 
No. of Writes:                  181                   162                   454 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  285                  1141                  1380 
No. of Writes:                  630                  1389                 40332 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                19746                310845                 43561 
No. of Writes:              9013735              43371892               7025089 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                53805                 84882              37057928 
No. of Writes:              3406899               1794373              18383965 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          60415      FORGET
      0.00       0.00 us       0.00 us       0.00 us         278544     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.13      97.00 us      97.00 us      97.00 us              1        STAT
      1.18      75.33 us      36.00 us     170.00 us             12     OPENDIR
     13.28     780.00 us     288.00 us    1955.00 us             13      STATFS
     85.41    2836.39 us      65.00 us   49275.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4870792010134 bytes
Data Written: 3334665501795 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     2 
No. of Writes:                    2                    32                    15 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    8                     0                    20 
No. of Writes:                  126               1354976                   230 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   23                    43                   436 
No. of Writes:                  181                   162                   454 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  285                  1141                  1380 
No. of Writes:                  630                  1389                 40332 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                19746                310845                 43561 
No. of Writes:              9013735              43371892               7025089 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                53805                 84882              37057928 
No. of Writes:              3406899               1794373              18383965 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          60415      FORGET
      0.00       0.00 us       0.00 us       0.00 us         278544     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.13      97.00 us      97.00 us      97.00 us              1        STAT
      1.18      75.33 us      36.00 us     170.00 us             12     OPENDIR
     13.28     780.00 us     288.00 us    1955.00 us             13      STATFS
     85.41    2836.39 us      65.00 us   49275.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4870792010134 bytes
Data Written: 3334665501795 bytes
 
Brick: fs-disk2:/storage/disk2r
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     9 
No. of Writes:                   43                  3068                 26544 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    3                    12                    25 
No. of Writes:              1161244                   278                   444 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   30                   334                   174 
No. of Writes:                 1288                   590                   664 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  712                  1333                 43449 
No. of Writes:                 3655                 13879               5701186 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               748206                 66005                 55221 
No. of Writes:             47541074               9200916               3530676 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                70004              32903535 
No. of Writes:              1478448              14907554 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          43493      FORGET
      0.00       0.00 us       0.00 us       0.00 us         278416     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335473  RELEASEDIR
      0.04      61.00 us      61.00 us      61.00 us              1        STAT
      1.07     123.08 us      35.00 us     666.00 us             12     OPENDIR
      7.04     744.23 us     277.00 us    1366.00 us             13      STATFS
     91.84    5490.39 us      53.00 us  122589.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4328727368494 bytes
Data Written: 2928729198120 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     9 
No. of Writes:                   43                  3068                 26544 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    3                    12                    25 
No. of Writes:              1161244                   278                   444 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   30                   334                   174 
No. of Writes:                 1288                   590                   664 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  712                  1333                 43449 
No. of Writes:                 3655                 13879               5701186 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               748206                 66005                 55221 
No. of Writes:             47541074               9200916               3530676 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                70004              32903535 
No. of Writes:              1478448              14907554 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          43493      FORGET
      0.00       0.00 us       0.00 us       0.00 us         278416     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335473  RELEASEDIR
      0.04      61.00 us      61.00 us      61.00 us              1        STAT
      1.07     123.08 us      35.00 us     666.00 us             12     OPENDIR
      7.04     744.23 us     277.00 us    1366.00 us             13      STATFS
     91.84    5490.39 us      53.00 us  122589.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4328727368494 bytes
Data Written: 2928729198120 bytes
 
Brick: fs-disk2:/storage/disk2f
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                  126                   195                   315 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    4                     0                     2 
No. of Writes:                  613               1113470                   807 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   25                    54                   126 
No. of Writes:                  871                  1288                  1754 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  105                   181                  1083 
No. of Writes:                 2521                  4672                 32257 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                64111               1188567                 91102 
No. of Writes:              5779122              49772428               8907380 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                67199                 79279              29491849 
No. of Writes:              3545695               1334590              13562444 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          55620      FORGET
      0.00       0.00 us       0.00 us       0.00 us         231692     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.04      69.00 us      69.00 us      69.00 us              1        STAT
      0.72     100.75 us      31.00 us     505.00 us             12     OPENDIR
      5.65     731.54 us     296.00 us    2123.00 us             13      STATFS
     93.59    6848.30 us      54.00 us  152037.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3886563048636 bytes
Data Written: 2744594192453 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                  126                   195                   315 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    4                     0                     2 
No. of Writes:                  613               1113470                   807 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   25                    54                   126 
No. of Writes:                  871                  1288                  1754 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  105                   181                  1083 
No. of Writes:                 2521                  4672                 32257 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                64111               1188567                 91102 
No. of Writes:              5779122              49772428               8907380 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                67199                 79279              29491849 
No. of Writes:              3545695               1334590              13562444 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          55620      FORGET
      0.00       0.00 us       0.00 us       0.00 us         231688     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.04      69.00 us      69.00 us      69.00 us              1        STAT
      0.72     100.75 us      31.00 us     505.00 us             12     OPENDIR
      5.65     731.54 us     296.00 us    2123.00 us             13      STATFS
     93.59    6848.30 us      54.00 us  152037.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3886563048636 bytes
Data Written: 2744594192453 bytes
 
Brick: fs-disk2:/storage/disk2m
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                   62                    81                  3778 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    0                     2                    10 
No. of Writes:                28538               1010483                   478 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   23                    37                   386 
No. of Writes:                  356                   584                   826 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  156                   590                   978 
No. of Writes:                 1261                  1992                 19168 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                22980                387448                 36474 
No. of Writes:              7417500              47836776               8493369 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                35463                 47791              29619466 
No. of Writes:              3750483               1492030              13143833 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          56305      FORGET
      0.00       0.00 us       0.00 us       0.00 us         330243     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.03      38.00 us      38.00 us      38.00 us              1        STAT
      0.66      82.58 us      32.00 us     177.00 us             12     OPENDIR
      5.67     659.69 us     306.00 us    1660.00 us             13      STATFS
     93.64    6153.57 us      51.00 us  126411.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3892131654878 bytes
Data Written: 2689492141208 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                   62                    81                  3778 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    0                     2                    10 
No. of Writes:                28538               1010483                   478 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   23                    37                   386 
No. of Writes:                  356                   584                   826 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  156                   590                   978 
No. of Writes:                 1261                  1992                 19168 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                22980                387448                 36474 
No. of Writes:              7417500              47836776               8493369 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                35463                 47791              29619466 
No. of Writes:              3750483               1492030              13143833 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          56305      FORGET
      0.00       0.00 us       0.00 us       0.00 us         330243     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.03      38.00 us      38.00 us      38.00 us              1        STAT
      0.66      82.58 us      32.00 us     177.00 us             12     OPENDIR
      5.67     659.69 us     306.00 us    1660.00 us             13      STATFS
     93.64    6153.57 us      51.00 us  126411.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3892131654878 bytes
Data Written: 2689492141208 bytes
 
Brick: fs-disk2:/storage/disk2a
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                    1                    19                  6028 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    9                     2                     5 
No. of Writes:                30940               1237328                   244 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   21                    26                   289 
No. of Writes:                  106                   174                   540 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  124                   545                  1075 
No. of Writes:                  837                  3921                 26110 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                49323                908252                 66678 
No. of Writes:              6410563              45570376               6177128 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                47174                 52841              26726899 
No. of Writes:              3820825               1574618              14071645 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          40611      FORGET
      0.00       0.00 us       0.00 us       0.00 us         239813     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.00      25.00 us      25.00 us      25.00 us              1        STAT
      0.00      60.00 us      60.00 us      60.00 us              1       FLUSH
      0.01     104.67 us      37.00 us     284.00 us             12     OPENDIR
      0.13    1754.00 us     338.00 us   15066.00 us             13      STATFS
      0.53    3808.24 us      54.00 us   92532.00 us             25      LOOKUP
      0.61   13582.12 us      76.00 us  100164.00 us              8    READDIRP
     17.75   57626.15 us    1811.00 us  507843.00 us             55       FSYNC
     29.76     115.64 us      19.00 us   33986.00 us          45960       WRITE
     51.22      90.07 us      19.00 us    7422.00 us         101563        READ
 
    Duration: 1986036 seconds
   Data Read: 3518405301400 bytes
Data Written: 2768283947733 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                    1                    19                  6028 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    9                     2                     5 
No. of Writes:                30940               1237328                   244 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   21                    26                   289 
No. of Writes:                  106                   174                   540 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  124                   545                  1075 
No. of Writes:                  837                  3921                 26110 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                49323                908252                 66678 
No. of Writes:              6410563              45570376               6177128 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                47174                 52841              26726899 
No. of Writes:              3820825               1574618              14071645 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          40611      FORGET
      0.00       0.00 us       0.00 us       0.00 us         239812     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.00      25.00 us      25.00 us      25.00 us              1        STAT
      0.00      60.00 us      60.00 us      60.00 us              1       FLUSH
      0.01     104.67 us      37.00 us     284.00 us             12     OPENDIR
      0.13    1754.00 us     338.00 us   15066.00 us             13      STATFS
      0.53    3808.24 us      54.00 us   92532.00 us             25      LOOKUP
      0.61   13582.12 us      76.00 us  100164.00 us              8    READDIRP
     17.75   57626.15 us    1811.00 us  507843.00 us             55       FSYNC
     29.76     115.64 us      19.00 us   33986.00 us          45960       WRITE
     51.22      90.07 us      19.00 us    7422.00 us         101563        READ
 
    Duration: 1986036 seconds
   Data Read: 3518405301400 bytes
Data Written: 2768283947733 bytes
 
Brick: fs-disk2:/storage/disk2j
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     2                     5 
No. of Writes:                   24                   837                 13216 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    1                     5                    18 
No. of Writes:              1020349                   165                    77 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   35                   259                   143 
No. of Writes:                  123                   464                   677 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  568                  1235                 38393 
No. of Writes:                 1685                 28804               6671957 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               672430                 58238                 51661 
No. of Writes:             40563190               7676616               3592549 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                65729              29401751 
No. of Writes:              1416702              12381773 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          47936      FORGET
      0.00       0.00 us       0.00 us       0.00 us         306250     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.09     156.00 us     156.00 us     156.00 us              1        STAT
      0.81     119.67 us      34.00 us     364.00 us             12     OPENDIR
      6.55     892.77 us     280.00 us    1649.00 us             13      STATFS
     33.85     112.50 us      53.00 us    9059.00 us            533       WRITE
     58.70    4521.65 us      53.00 us  100893.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3868440883905 bytes
Data Written: 2492643392426 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     2                     5 
No. of Writes:                   24                   837                 13216 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    1                     5                    18 
No. of Writes:              1020349                   165                    77 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   35                   259                   143 
No. of Writes:                  123                   464                   677 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  568                  1235                 38393 
No. of Writes:                 1685                 28804               6671957 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               672430                 58238                 51661 
No. of Writes:             40563190               7676616               3592549 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                65729              29401751 
No. of Writes:              1416702              12381773 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          47936      FORGET
      0.00       0.00 us       0.00 us       0.00 us         306249     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.09     156.00 us     156.00 us     156.00 us              1        STAT
      0.81     119.67 us      34.00 us     364.00 us             12     OPENDIR
      6.55     892.77 us     280.00 us    1649.00 us             13      STATFS
     33.85     112.50 us      53.00 us    9059.00 us            533       WRITE
     58.70    4521.65 us      53.00 us  100893.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3868440883905 bytes
Data Written: 2492643392426 bytes
 
Brick: fs-disk2:/storage/disk2d
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    2                     1                     9 
No. of Writes:                   23                    61                  7028 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    4                     9                    18 
No. of Writes:               753276                   104                   317 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   23                   326                   165 
No. of Writes:                  934                   325                   540 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  791                  1187                 19864 
No. of Writes:                 3304                 35873               5996879 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               306443                 33611                 34280 
No. of Writes:             42368594               8960333               4239658 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                49603              28859798 
No. of Writes:              1087801              12883793 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          76783      FORGET
      0.00       0.00 us       0.00 us       0.00 us         303450     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.05      68.00 us      68.00 us      68.00 us              1        STAT
      0.73      86.25 us      32.00 us     241.00 us             12     OPENDIR
      5.91     646.23 us     272.00 us    1301.00 us             13      STATFS
     93.32    5770.74 us      78.00 us  116761.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3792036640532 bytes
Data Written: 2573766816955 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    2                     1                     9 
No. of Writes:                   23                    61                  7028 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    4                     9                    18 
No. of Writes:               753276                   104                   317 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   23                   326                   165 
No. of Writes:                  934                   325                   540 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  791                  1187                 19864 
No. of Writes:                 3304                 35873               5996879 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               306443                 33611                 34280 
No. of Writes:             42368594               8960333               4239658 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                49603              28859798 
No. of Writes:              1087801              12883793 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          76783      FORGET
      0.00       0.00 us       0.00 us       0.00 us         303450     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.05      68.00 us      68.00 us      68.00 us              1        STAT
      0.73      86.25 us      32.00 us     241.00 us             12     OPENDIR
      5.91     646.23 us     272.00 us    1301.00 us             13      STATFS
     93.32    5770.74 us      78.00 us  116761.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3792036640532 bytes
Data Written: 2573766816955 bytes
 
Brick: fs-disk2:/storage/disk2i
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                   20                  3578                 27548 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    3                     6                    22 
No. of Writes:               724964                    48                    45 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   23                   337                    92 
No. of Writes:                   76                   329                   444 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  704                   992                 33244 
No. of Writes:                  872                 20763               5178705 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               586213                 48447                 36707 
No. of Writes:             44974188               5415301               3731632 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                46456              27953620 
No. of Writes:              1022266              15271937 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          52503      FORGET
      0.00       0.00 us       0.00 us       0.00 us         255832     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.13     105.00 us     105.00 us     105.00 us              1        STAT
      1.30      84.92 us      33.00 us     213.00 us             12     OPENDIR
     13.80     831.38 us     280.00 us    1633.00 us             13      STATFS
     84.76    2886.22 us      47.00 us   63229.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3675283066972 bytes
Data Written: 2810419451093 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                   20                  3578                 27548 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    3                     6                    22 
No. of Writes:               724964                    48                    45 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   23                   337                    92 
No. of Writes:                   76                   329                   444 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  704                   992                 33244 
No. of Writes:                  872                 20763               5178705 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               586213                 48447                 36707 
No. of Writes:             44974188               5415301               3731632 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                46456              27953620 
No. of Writes:              1022266              15271937 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          52503      FORGET
      0.00       0.00 us       0.00 us       0.00 us         255832     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.13     105.00 us     105.00 us     105.00 us              1        STAT
      1.30      84.92 us      33.00 us     213.00 us             12     OPENDIR
     13.80     831.38 us     280.00 us    1633.00 us             13      STATFS
     84.76    2886.22 us      47.00 us   63229.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3675283066972 bytes
Data Written: 2810419451093 bytes
 
Brick: fs-disk2:/storage/disk2e
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     1                     6 
No. of Writes:                   20                 16239                 63143 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    3                    11                    18 
No. of Writes:              1263764                   175                    84 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   17                   533                   159 
No. of Writes:                  132                   372                   670 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  763                  1393                 37962 
No. of Writes:                 6789                 49897               6336454 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               666476                 56464                 50579 
No. of Writes:             36558716               7338359               3327733 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                61462              32430220 
No. of Writes:              1613059              17873798 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          52379      FORGET
      0.00       0.00 us       0.00 us       0.00 us         230163     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.14     169.00 us     169.00 us     169.00 us              1        STAT
      0.76      77.00 us      34.00 us     173.00 us             12     OPENDIR
      9.09     845.92 us     263.00 us    2666.00 us             13      STATFS
     90.00    4731.83 us      56.00 us  104925.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4264934347534 bytes
Data Written: 3183057746349 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     1                     6 
No. of Writes:                   20                 16239                 63143 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    3                    11                    18 
No. of Writes:              1263764                   175                    84 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   17                   533                   159 
No. of Writes:                  132                   372                   670 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  763                  1393                 37962 
No. of Writes:                 6789                 49897               6336454 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               666476                 56464                 50579 
No. of Writes:             36558716               7338359               3327733 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                61462              32430220 
No. of Writes:              1613059              17873798 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          52379      FORGET
      0.00       0.00 us       0.00 us       0.00 us         230163     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.14     169.00 us     169.00 us     169.00 us              1        STAT
      0.76      77.00 us      34.00 us     173.00 us             12     OPENDIR
      9.09     845.92 us     263.00 us    2666.00 us             13      STATFS
     90.00    4731.83 us      56.00 us  104925.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4264934347534 bytes
Data Written: 3183057746349 bytes
 
Brick: fs-disk2:/storage/disk2b
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     1                     2 
No. of Writes:                   30                    84                  7511 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    2                     5                    29 
No. of Writes:              1655560                   185                   422 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   22                   259                   112 
No. of Writes:                 1646                   701                   450 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  633                  1091                 27587 
No. of Writes:                  950                 11269               6848760 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               469437                 42466                 40711 
No. of Writes:             40172731               7534709               3517428 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                52771              32605919 
No. of Writes:              1884565              12076893 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          51766      FORGET
      0.00       0.00 us       0.00 us       0.00 us         238087     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.05     127.00 us     127.00 us     127.00 us              1        STAT
      0.48     103.33 us      36.00 us     241.00 us             12     OPENDIR
      3.19     632.00 us     262.00 us    1235.00 us             13      STATFS
     45.09    5055.96 us      64.00 us  112717.00 us             23      LOOKUP
     51.20   16505.50 us      69.00 us  123439.00 us              8    READDIRP
 
    Duration: 1986036 seconds
   Data Read: 4284923708152 bytes
Data Written: 2510476723393 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     1                     2 
No. of Writes:                   30                    84                  7511 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    2                     5                    29 
No. of Writes:              1655560                   185                   422 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   22                   259                   112 
No. of Writes:                 1646                   701                   450 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                  633                  1091                 27587 
No. of Writes:                  950                 11269               6848760 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               469437                 42466                 40711 
No. of Writes:             40172731               7534709               3517428 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                52771              32605919 
No. of Writes:              1884565              12076893 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          51766      FORGET
      0.00       0.00 us       0.00 us       0.00 us         238087     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335488  RELEASEDIR
      0.05     127.00 us     127.00 us     127.00 us              1        STAT
      0.48     103.33 us      36.00 us     241.00 us             12     OPENDIR
      3.19     632.00 us     262.00 us    1235.00 us             13      STATFS
     45.09    5055.96 us      64.00 us  112717.00 us             23      LOOKUP
     51.20   16505.50 us      69.00 us  123439.00 us              8    READDIRP
 
    Duration: 1986036 seconds
   Data Read: 4284923708152 bytes
Data Written: 2510476723393 bytes
 
Brick: fs-disk2:/storage/disk2x
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     1                     0 
No. of Writes:                    3                    38                 13386 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                   10                     2                    21 
No. of Writes:                61870               1251517                   340 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   11                    26                   366 
No. of Writes:                  105                   235                   402 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                   45                   299                   726 
No. of Writes:                  557                  1385                  9453 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                62983               1185549                 86014 
No. of Writes:              5857418              44739090               7120219 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                57842                 58475              30049117 
No. of Writes:              3448151               1472086              13736011 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          46569      FORGET
      0.00       0.00 us       0.00 us       0.00 us         221882     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335452  RELEASEDIR
      0.03      49.00 us      49.00 us      49.00 us              1        STAT
      0.48      70.08 us      24.00 us     155.00 us             12     OPENDIR
      6.51     872.38 us     318.00 us    1644.00 us             13      STATFS
     17.03      91.55 us      49.00 us     753.00 us            324       WRITE
     75.94    5750.13 us      43.00 us  119003.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3957221521620 bytes
Data Written: 2691859417510 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     1                     0 
No. of Writes:                    3                    38                 13386 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                   10                     2                    21 
No. of Writes:                61870               1251517                   340 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   11                    26                   366 
No. of Writes:                  105                   235                   402 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                   45                   299                   726 
No. of Writes:                  557                  1385                  9453 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                62983               1185549                 86014 
No. of Writes:              5857418              44739090               7120219 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                57842                 58475              30049117 
No. of Writes:              3448151               1472086              13736011 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          46569      FORGET
      0.00       0.00 us       0.00 us       0.00 us         221882     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335452  RELEASEDIR
      0.03      49.00 us      49.00 us      49.00 us              1        STAT
      0.48      70.08 us      24.00 us     155.00 us             12     OPENDIR
      6.51     872.38 us     318.00 us    1644.00 us             13      STATFS
     17.03      91.55 us      49.00 us     753.00 us            324       WRITE
     75.94    5750.13 us      43.00 us  119003.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 3957221521620 bytes
Data Written: 2691859417510 bytes
 
Brick: fs-disk2:/storage/disk2n
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     1 
No. of Writes:                    1                    13                  4444 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    7                     2                    11 
No. of Writes:                28553               1067713                    57 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   15                    77                   290 
No. of Writes:                  267                  1711                   362 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  163                   767                  1370 
No. of Writes:                  398                  3222                 46824 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                45635                831262                 71660 
No. of Writes:             10618719              46250340               7444079 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                62360                 79696              30939710 
No. of Writes:              3474292               1425708              14514345 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          57638      FORGET
      0.00       0.00 us       0.00 us       0.00 us         273547     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335473  RELEASEDIR
      0.11      88.00 us      88.00 us      88.00 us              1        STAT
      2.08     145.08 us      32.00 us     867.00 us             12     OPENDIR
     10.58     679.46 us     287.00 us    1777.00 us             13      STATFS
     87.23    3167.17 us      48.00 us   70013.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4073195963222 bytes
Data Written: 2843693209398 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     1 
No. of Writes:                    1                    13                  4444 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    7                     2                    11 
No. of Writes:                28553               1067713                    57 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                   15                    77                   290 
No. of Writes:                  267                  1711                   362 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                  163                   767                  1370 
No. of Writes:                  398                  3222                 46824 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                45635                831262                 71660 
No. of Writes:             10618719              46250340               7444079 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                62360                 79696              30939710 
No. of Writes:              3474292               1425708              14514345 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          57638      FORGET
      0.00       0.00 us       0.00 us       0.00 us         273547     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335473  RELEASEDIR
      0.11      88.00 us      88.00 us      88.00 us              1        STAT
      2.08     145.08 us      32.00 us     867.00 us             12     OPENDIR
     10.58     679.46 us     287.00 us    1777.00 us             13      STATFS
     87.23    3167.17 us      48.00 us   70013.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4073195963222 bytes
Data Written: 2843693209398 bytes
 
Brick: fs-disk2:/storage/disk2s
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     8 
No. of Writes:                   32                 10435                 55686 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    2                     3                    25 
No. of Writes:              1128338                   253                    98 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   40                   626                   584 
No. of Writes:                  826                   432                   569 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                 3722                  3204                 38092 
No. of Writes:                 3533                 13438              14705697 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               665490                 59640                 47624 
No. of Writes:             47468109               5763490               3321768 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                60196              31026864 
No. of Writes:              1373769              19646558 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          37669      FORGET
      0.00       0.00 us       0.00 us       0.00 us         236246     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335467  RELEASEDIR
      0.02      36.00 us      36.00 us      36.00 us              1        STAT
      0.65      80.25 us      35.00 us     123.00 us             12     OPENDIR
      6.03     683.85 us     301.00 us    1207.00 us             13      STATFS
     28.14     120.64 us      58.00 us     724.00 us            344       WRITE
     65.16    4178.48 us      53.00 us   93204.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4080778290391 bytes
Data Written: 3488412950060 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     8 
No. of Writes:                   32                 10435                 55686 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    2                     3                    25 
No. of Writes:              1128338                   253                    98 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                   40                   626                   584 
No. of Writes:                  826                   432                   569 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                 3722                  3204                 38092 
No. of Writes:                 3533                 13438              14705697 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               665490                 59640                 47624 
No. of Writes:             47468109               5763490               3321768 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                60196              31026864 
No. of Writes:              1373769              19646558 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us          37669      FORGET
      0.00       0.00 us       0.00 us       0.00 us         236243     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335467  RELEASEDIR
      0.02      36.00 us      36.00 us      36.00 us              1        STAT
      0.65      80.25 us      35.00 us     123.00 us             12     OPENDIR
      6.03     683.85 us     301.00 us    1207.00 us             13      STATFS
     28.14     120.64 us      58.00 us     724.00 us            344       WRITE
     65.16    4178.48 us      53.00 us   93204.00 us             23      LOOKUP
 
    Duration: 1986036 seconds
   Data Read: 4080778290391 bytes
Data Written: 3488412950060 bytes
 
Brick: fs-disk3:/storage/disk3a
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                   29                  9207                 14136 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:              1506450                   195                   128 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                    2                     3                     2 
No. of Writes:                  147                   861                   669 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                   17                   790                 55454 
No. of Writes:                 6671                  4656              14525176 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:              1104707                 77003                 49913 
No. of Writes:             48697616               3345008               3395449 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                56765              14814839 
No. of Writes:              1759924              40537209 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         180781      FORGET
      0.00       0.00 us       0.00 us       0.00 us         139184     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335451  RELEASEDIR
      0.33     136.00 us     136.00 us     136.00 us              1        STAT
      1.34      45.92 us      31.00 us      75.00 us             12     OPENDIR
      7.29     231.31 us     183.00 us     285.00 us             13      STATFS
     91.05    1632.91 us      51.00 us   35331.00 us             23      LOOKUP
 
    Duration: 1986170 seconds
   Data Read: 1958970926561 bytes
Data Written: 6224168303087 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                   29                  9207                 14136 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:              1506450                   195                   128 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                    2                     3                     2 
No. of Writes:                  147                   861                   669 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                   17                   790                 55454 
No. of Writes:                 6671                  4656              14525176 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:              1104707                 77003                 49913 
No. of Writes:             48697616               3345008               3395449 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                56765              14814839 
No. of Writes:              1759924              40537209 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         180781      FORGET
      0.00       0.00 us       0.00 us       0.00 us         139184     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335451  RELEASEDIR
      0.33     136.00 us     136.00 us     136.00 us              1        STAT
      1.34      45.92 us      31.00 us      75.00 us             12     OPENDIR
      7.29     231.31 us     183.00 us     285.00 us             13      STATFS
     91.05    1632.91 us      51.00 us   35331.00 us             23      LOOKUP
 
    Duration: 1986170 seconds
   Data Read: 1958970926561 bytes
Data Written: 6224168303087 bytes
 
Brick: fs-disk3:/storage/disk3b
-------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                    2                    30                    17 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    0                     1                     0 
No. of Writes:                  107               1260245                   169 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                    0                     2                     1 
No. of Writes:                  458                  1781                   942 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                    4                     9                   465 
No. of Writes:                  722                  4519                 22658 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                11517                222524                 19810 
No. of Writes:             13504637              54863025               3252134 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                17651                 24629              10317751 
No. of Writes:              3412859               1576536              39766617 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         181199      FORGET
      0.00       0.00 us       0.00 us       0.00 us         164707     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335451  RELEASEDIR
      0.11      41.00 us      41.00 us      41.00 us              1        STAT
      1.71      52.42 us      31.00 us     108.00 us             12     OPENDIR
      8.70     246.38 us     189.00 us     400.00 us             13      STATFS
     89.48    1431.78 us      55.00 us   30842.00 us             23      LOOKUP
 
    Duration: 1986170 seconds
   Data Read: 1357524224644 bytes
Data Written: 6138513371375 bytes
 
Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                    2                    30                    17 
 
   Block Size:                  8b+                  16b+                  32b+ 
 No. of Reads:                    0                     1                     0 
No. of Writes:                  107               1260245                   169 
 
   Block Size:                 64b+                 128b+                 256b+ 
 No. of Reads:                    0                     2                     1 
No. of Writes:                  458                  1781                   942 
 
   Block Size:                512b+                1024b+                2048b+ 
 No. of Reads:                    4                     9                   465 
No. of Writes:                  722                  4519                 22658 
 
   Block Size:               4096b+                8192b+               16384b+ 
 No. of Reads:                11517                222524                 19810 
No. of Writes:             13504637              54863025               3252134 
 
   Block Size:              32768b+               65536b+              131072b+ 
 No. of Reads:                17651                 24629              10317751 
No. of Writes:              3412859               1576536              39766617 
 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         181199      FORGET
      0.00       0.00 us       0.00 us       0.00 us         164707     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335451  RELEASEDIR
      0.11      41.00 us      41.00 us      41.00 us              1        STAT
      1.71      52.42 us      31.00 us     108.00 us             12     OPENDIR
      8.70     246.38 us     189.00 us     400.00 us             13      STATFS
     89.48    1431.78 us      55.00 us   30842.00 us             23      LOOKUP
 
    Duration: 1986170 seconds
   Data Read: 1357524224644 bytes
Data Written: 6138513371375 bytes
 
Brick: fs-disk3:/storage/disk3c
-------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                   21                 26595                 55485 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:              1516716                   176                   108 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                    0                     3                     2 
No. of Writes:                  102                   626                   633 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                   11                   465                 41485 
No. of Writes:                 2042                  9289              16365920 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               830172                 64623                 52430 
No. of Writes:             52379250               2117265               3642628 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                69128              12576665 
No. of Writes:              1884882              40963295 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         181378      FORGET
      0.00       0.00 us       0.00 us       0.00 us         169199     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335451  RELEASEDIR
      0.10      46.00 us      46.00 us      46.00 us              1        STAT
      1.21      44.92 us      29.00 us      90.00 us             12     OPENDIR
      7.47     256.69 us     175.00 us     463.00 us             13      STATFS
     91.23    1773.00 us      53.00 us   38905.00 us             23      LOOKUP
 
    Duration: 1986170 seconds
   Data Read: 1664583476377 bytes
Data Written: 6303233665142 bytes
 
Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:                   21                 26595                 55485 
 
   Block Size:                 16b+                  32b+                  64b+ 
 No. of Reads:                    0                     0                     0 
No. of Writes:              1516716                   176                   108 
 
   Block Size:                128b+                 256b+                 512b+ 
 No. of Reads:                    0                     3                     2 
No. of Writes:                  102                   626                   633 
 
   Block Size:               1024b+                2048b+                4096b+ 
 No. of Reads:                   11                   465                 41485 
No. of Writes:                 2042                  9289              16365920 
 
   Block Size:               8192b+               16384b+               32768b+ 
 No. of Reads:               830172                 64623                 52430 
No. of Writes:             52379250               2117265               3642628 
 
   Block Size:              65536b+              131072b+ 
 No. of Reads:                69128              12576665 
No. of Writes:              1884882              40963295 
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         181378      FORGET
      0.00       0.00 us       0.00 us       0.00 us         169199     RELEASE
      0.00       0.00 us       0.00 us       0.00 us       15335451  RELEASEDIR
      0.10      46.00 us      46.00 us      46.00 us              1        STAT
      1.21      44.92 us      29.00 us      90.00 us             12     OPENDIR
      7.47     256.69 us     175.00 us     463.00 us             13      STATFS
     91.23    1773.00 us      53.00 us   38905.00 us             23      LOOKUP
 
    Duration: 1986170 seconds
   Data Read: 1664583476377 bytes
Data Written: 6303233665142 bytes
 
[root at disk2 ~]# gluster volume profile shared stop


On Mar 9, 2013, at 12:01 PM, Anand Avati <anand.avati at gmail.com> wrote:

> Can you run some read experiments using a ramfs backed brick? Also, what are your jumbo frames setting? Can you try tweaking that? Is there anything suspicious in 'top' in either the client or the server? It would also be very useful if you turned on profiling and give us the output.
> 
> server# gluster volume profile <name> on
> 
> client# dd ... # test 1
> 
> server# gluster volume profile <name> info
> 
> client# dd .... # test 2
> 
> server# gluster volume profile <name> info
> 
> Thanks!
> Avati
> 
> 
> On Fri, Mar 8, 2013 at 6:40 AM, Thomas Wakefield <twake at cola.iges.org> wrote:
> I am still confused how ext4 is suddenly slow to read when it's behind Gluster, but plenty fast stand alone reading?
> 
> And it writes really fast from both the server and client.
> 
> 
> 
> On Mar 8, 2013, at 4:07 AM, "Jon Tegner" <tegner at renget.se> wrote:
> 
>> We had issues with ext4 about a bit less than a year ago, at that time I upgraded the servers to CentOS-6.2. But that gave us large problems (more than slow reads). Since I didn't want to reformat the disks at that time (and switch to XFS) I went back to CentOS-5.5 (which we had used before). On some link (think it was https://bugzilla.redhat.com/show_bug.cgi?id=713546 but can't seem to reach that now) it was stated that the ext4-issue was present even on later versions of CentOS-5 (I _think_ 5.8 was affected).
>> 
>> Are there hope that the "ext4-issue" will be solved in later kernels/versions of gluster? If not, it seems one is eventually forced to switch to XFS.
>> 
>> Regards,
>> 
>> /jon
>> 
>> On Mar 8, 2013 03:27 "Thomas Wakefield" <twake at iges.org> wrote:
>> 
>>> 
>>> inode size is 256.
>>> 
>>> 
>>> 
>>> 
>>> Pretty stuck with these settings and ext4. I missed the memo that
>>> Gluster started to prefer xfs, back in the 2.x days xfs was not the
>>> preferred filesystem. At this point it's a 340TB filesystem with 160TB
>>> used. I just added more space, and was doing some followup testing and
>>> wasn't impressed with the results. But I am sure I was happier before
>>> with the performance.
>>> 
>>> 
>>> 
>>> 
>>> Still running CentOS 5.8
>>> 
>>> 
>>> 
>>> 
>>> Anything else I could look at?
>>> 
>>> 
>>> 
>>> 
>>> Thanks, Tom
>>> 
>>> 
>>> 
>>> 
>>> 
>>> On Mar 7, 2013, at 5:04 PM, Bryan Whitehead <<driver at megahappy.net>>
>>> wrote:
>>> 
>>> 
>>> > I'm sure you know, but xfs is the recommended filesystem for
>>> > glusterfs. Ext4 has a number of issues. (Particularly on
>>> > CentOS/Redhat6).
>>> > 
>>> > 
>>> > 
>>> > The default inode size for ext4 (and xfs) is small for the number of
>>> > extended attributes glusterfs uses. This causes a minor hit in
>>> > performance on xfs if theextended attributes grow more than 265 (xfs
>>> > default size). In xfs, this is fixed by setting the size of an inode
>>> > to 512. How big the impact is on ext4 is something I don't know
>>> > offhand. But looking at a couple of boxes I have it looks like some
>>> > ext4 filesystems have 128 inode size and some have 256 inode size
>>> > (both of which are too small for glusterfs). The performance hit is
>>> > everytimeextended attributes need to be read several inodes need to be
>>> > seeked and found.
>>> > 
>>> > 
>>> > 
>>> > run "dumpe2fs -h <blockdevice> | grep size" on your ext4 mountpoints.
>>> > 
>>> > 
>>> > 
>>> > 
>>> > If it is not too much of a bother - I'd try xfs as your filesystem for
>>> > the bricks
>>> > 
>>> > 
>>> > 
>>> > 
>>> > mkfs.xfs -i size=512 <blockdevice>
>>> > 
>>> > 
>>> > 
>>> > 
>>> > Please see this for more detailed info:
>>> > 
>>> > <https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Storage/2.0/ht
>>> > ml-single/Administration_Guide/index.html#chap-User_Guide-Setting_Volu
>>> > mes>
>>> > 
>>> > 
>>> > 
>>> > 
>>> > 
>>> > On Thu, Mar 7, 2013 at 12:08 PM, Thomas Wakefield
>>> > <<twake at cola.iges.org>> wrote:
>>> > 
>>> > > Everything is built as ext4, no options other than
>>> > > lazy_itable_init=1 when I built the filesystems.
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > Server mount example:
>>> > > 
>>> > > LABEL=disk2a /storage/disk2a ext4defaults 0 0
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > Client mount:
>>> > > 
>>> > > fs-disk2:/shared /shared glusterfs defaults 0 0
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > Remember, the slow reads are only from gluster clients, the disks
>>> > > are really fast when I am local on the server testing the disks.
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > -Tom
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > 
>>> > > On Mar 7, 2013, at 1:09 PM, Bryan Whitehead <<driver at megahappy.net>>
>>> > > wrote:
>>> > > 
>>> > > 
>>> > > > Was just thinking, what is your mount options for your bricks
>>> > > > (using inode64?)? Also, you are using xfs... right?
>>> > > > 
>>> > > > 
>>> > > > 
>>> > > > When you created the filesystems did you allocate more inode
>>> > > > space? -i size=512 ?
>>> > > > 
>>> > > > 
>>> > > > 
>>> > > > 
>>> > > > On Thu, Mar 7, 2013 at 5:49 AM, Thomas Wakefield
>>> > > > <<twake at cola.iges.org>> wrote:
>>> > > > 
>>> > > > > Still looking for help.
>>> > > > > 
>>> > > > > 
>>> > > > > 
>>> > > > > 
>>> > > > > 
>>> > > > > On Mar 4, 2013, at 7:43 AM, Thomas Wakefield <<twake at iges.org>>
>>> > > > > wrote:
>>> > > > > 
>>> > > > > 
>>> > > > > > Also, I tested an NFS mount over the same 10GB link, and was
>>> > > > > > able to pull almost 200MB/s. But Gluster is still much slower.
>>> > > > > > Also I tested running it for a longer test, 105GB of data, and
>>> > > > > > still showed that writing is MUCH faster. Which makes no sense
>>> > > > > > when the disks can read 2x as fast as they can write.
>>> > > > > > 
>>> > > > > > 
>>> > > > > > 
>>> > > > > > Any other thoughts?
>>> > > > > > 
>>> > > > > > 
>>> > > > > > 
>>> > > > > > 
>>> > > > > > [root at cpu_crew1 ~]# dd if=/dev/zero
>>> > > > > > of=/shared/working/benchmark/test.cpucrew1 bs=512k
>>> > > > > > count=200000 ; dd if=/shared/working/benchmark/test.cpucrew1
>>> > > > > > of=/dev/null bs=512k
>>> > > > > > 
>>> > > > > > 200000+0 records in
>>> > > > > > 
>>> > > > > > 200000+0 records out
>>> > > > > > 
>>> > > > > > 104857600000 bytes (105 GB) copied, 159.135 seconds, 659 MB/s
>>> > > > > > 
>>> > > > > > 200000+0 records in
>>> > > > > > 
>>> > > > > > 200000+0 records out
>>> > > > > > 
>>> > > > > > 104857600000 bytes (105 GB) copied, 1916.87 seconds, 54.7 MB/s
>>> > > > > > 
>>> > > > > > 
>>> > > > > > 
>>> > > > > > 
>>> > > > > > 
>>> > > > > > 
>>> > > > > > 
>>> > > > > > On Mar 1, 2013, at 9:58 AM, Thomas Wakefield
>>> > > > > > <<twake at iges.org>> wrote:
>>> > > > > > 
>>> > > > > > 
>>> > > > > > > The max setting for performance.read-ahead-page-count is 16,
>>> > > > > > > which I did just try. No significant change.
>>> > > > > > > 
>>> > > > > > > 
>>> > > > > > > 
>>> > > > > > > 
>>> > > > > > > Any other setting options?
>>> > > > > > > 
>>> > > > > > > 
>>> > > > > > > 
>>> > > > > > > 
>>> > > > > > > 
>>> > > > > > > 
>>> > > > > > > 
>>> > > > > > > 
>>> > > > > > > On Feb 28, 2013, at 10:18 PM, Anand Avati
>>> > > > > > > <<anand.avati at gmail.com>> wrote:
>>> > > > > > > 
>>> > > > > > > 
>>> > > > > > > > Can you try "gluster volume set <volname>
>>> > > > > > > > performance.read-ahead-page-count 64" or some value higher
>>> > > > > > > > or lower?
>>> > > > > > > > 
>>> > > > > > > > 
>>> > > > > > > > 
>>> > > > > > > > Avati
>>> > > > > > > > 
>>> > > > > > > > 
>>> > > > > > > > On Thu, Feb 28, 2013 at 7:15 PM, Thomas Wakefield
>>> > > > > > > > <<twake at iges.org>> wrote:
>>> > > > > > > > 
>>> > > > > > > > > Good point, forgot to set a blcoksize, here are the
>>> > > > > > > > > redone dd tests:
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > [root at cpu_crew1 ~]# dd
>>> > > > > > > > > if=/shared/working/benchmark/test.cpucrew1 of=/dev/null
>>> > > > > > > > > bs=128k
>>> > > > > > > > > 
>>> > > > > > > > > 40000+0 records in
>>> > > > > > > > > 
>>> > > > > > > > > 40000+0 records out
>>> > > > > > > > > 
>>> > > > > > > > > 5242880000 bytes (5.2 GB) copied, 65.4928 seconds, 80.1
>>> > > > > > > > > MB/s
>>> > > > > > > > > 
>>> > > > > > > > > [root at cpu_crew1 ~]# dd
>>> > > > > > > > > if=/shared/working/benchmark/test.cpucrew1 of=/dev/null
>>> > > > > > > > > bs=1M
>>> > > > > > > > > 
>>> > > > > > > > > 5000+0 records in
>>> > > > > > > > > 
>>> > > > > > > > > 5000+0 records out
>>> > > > > > > > > 
>>> > > > > > > > > 5242880000 bytes (5.2 GB) copied, 49.0907 seconds, 107
>>> > > > > > > > > MB/s
>>> > > > > > > > > 
>>> > > > > > > > > [root at cpu_crew1 ~]# dd
>>> > > > > > > > > if=/shared/working/benchmark/test.cpucrew1 of=/dev/null
>>> > > > > > > > > bs=4M
>>> > > > > > > > > 
>>> > > > > > > > > 1250+0 records in
>>> > > > > > > > > 
>>> > > > > > > > > 1250+0 records out
>>> > > > > > > > > 
>>> > > > > > > > > 5242880000 bytes (5.2 GB) copied, 44.5724 seconds, 118
>>> > > > > > > > > MB/s
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > Still not impressive.
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > -Tom
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > On Feb 28, 2013, at 8:42 PM, Jeff Anderson-Lee
>>> > > > > > > > > <<jonah at eecs.berkeley.edu>> wrote:
>>> > > > > > > > > 
>>> > > > > > > > > 
>>> > > > > > > > > > Thomas,
>>> > > > > > > > > > 
>>> > > > > > > > > > You have not specified a block size, so you are doing
>>> > > > > > > > > > a huge number of small(ish) reads with associated
>>> > > > > > > > > > round trips. What happens with dd bs=128k ..?
>>> > > > > > > > > > 
>>> > > > > > > > > > Jeff Anderson-Lee
>>> > > > > > > > > > 
>>> > > > > > > > > > On 2/28/2013 5:30 PM, Thomas Wakefield wrote:
>>> > > > > > > > > > 
>>> > > > > > > > > > 
>>> > > > > > > > > > > Did a fresh dd test just to confirm, same results:
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 
>>> > > > > > > > > > > [root at cpu_crew1 benchmark]# dd if=/dev/zero
>>> > > > > > > > > > > of=/shared/working/benchmark/test.cpucrew1 bs=512k
>>> > > > > > > > > > > count=10000
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 10000+0 records in
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 10000+0 records out
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 5242880000 bytes (5.2 GB) copied, 7.43695 seconds,
>>> > > > > > > > > > > 705 MB/s
>>> > > > > > > > > > > 
>>> > > > > > > > > > > [root at cpu_crew1 benchmark]# dd
>>> > > > > > > > > > > if=/shared/working/benchmark/test.cpucrew1
>>> > > > > > > > > > > of=/dev/null
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 552126+0 records in
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 552125+0 records out
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 282688000 bytes (283 MB) copied, 37.8514 seconds,
>>> > > > > > > > > > > 7.5 MB/s
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 
>>> > > > > > > > > > > On Feb 28, 2013, at 8:14 PM, Bryan Whitehead
>>> > > > > > > > > > > <<driver at megahappy.net>> wrote:
>>> > > > > > > > > > > 
>>> > > > > > > > > > > 
>>> > > > > > > > > > > > How are you doing the reading? Is this still an
>>> > > > > > > > > > > > iozone benchmark?
>>> > > > > > > > > > > > 
>>> > > > > > > > > > > > 
>>> > > > > > > > > > > > 
>>> > > > > > > > > > > > if you simply dd if=/glustermount/bigfile
>>> > > > > > > > > > > > of=/dev/null, is the speed better?
>>> > > > > > > > > > > > 
>>> > > > > > > > > > > > 
>>> > > > > > > > > > > > 
>>> > > > > > > > > > > > 
>>> > > > > > > > > > > > On Thu, Feb 28, 2013 at 5:05 PM, Thomas Wakefield
>>> > > > > > > > > > > > <<twake at iges.org>> wrote:
>>> > > > > > > > > > > > 
>>> > > > > > > > > > > > > I get great speed locally, it's only when I add
>>> > > > > > > > > > > > > gluster in that it slows down. I get 2GB/s
>>> > > > > > > > > > > > > locally to the exact same brick. It's gluster
>>> > > > > > > > > > > > > that is having the read issue (80MB/s). But
>>> > > > > > > > > > > > > Gluster can write just fine, 800MB/s.
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > The blockdev idea is a good one, and I have
>>> > > > > > > > > > > > > already done it. Thanks though.
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > -Tom
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > On Feb 28, 2013, at 7:53 PM, Ling Ho
>>> > > > > > > > > > > > > <<ling at slac.stanford.edu>> wrote:
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > Tom,
>>> > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > What type of disks do you have? If they are
>>> > > > > > > > > > > > > > raid 5 or 6, have you try setting the
>>> > > > > > > > > > > > > > read-ahead size to 8192 or 16384 (blockdev
>>> > > > > > > > > > > > > > --setra 8192 /dev/<sd?> ?
>>> > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > ...
>>> > > > > > > > > > > > > > ling
>>> > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > On 02/28/2013 04:23 PM, Thomas Wakefield
>>> > > > > > > > > > > > > > wrote:
>>> > > > > > > > > > > > > > > Did anyone else have any ideas on
>>> > > > > > > > > > > > > > > performance tuning for reads?
>>> > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > On Feb 27, 2013, at 9:29 PM, Thomas
>>> > > > > > > > > > > > > > > Wakefield <<twake at iges.org>> wrote:
>>> > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > Bryan-
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > Yes I can write at 700-800MBytes/sec, but
>>> > > > > > > > > > > > > > > > i can only read at 70-80 MBytes/sec. I
>>> > > > > > > > > > > > > > > > would be very happy if I could get it to
>>> > > > > > > > > > > > > > > > read at the same speed it can write at.
>>> > > > > > > > > > > > > > > > And the 70-80 is sequential, not random
>>> > > > > > > > > > > > > > > > for reads, same exact test commands on the
>>> > > > > > > > > > > > > > > > disk server are in the 2+GB/s range, so I
>>> > > > > > > > > > > > > > > > know the disk server can do it.
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > -Tom
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > On Feb 27, 2013, at 7:41 PM, Bryan
>>> > > > > > > > > > > > > > > > Whitehead <<driver at megahappy.net>> wrote:
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > Are your figures 700-800MByte/sec?
>>> > > > > > > > > > > > > > > > > Because that is probably as fast as your
>>> > > > > > > > > > > > > > > > > 10G nic cards are able to do. You can
>>> > > > > > > > > > > > > > > > > test that by trying to push a large
>>> > > > > > > > > > > > > > > > > amount of data over nc or ftp.
>>> > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > Might want to try Infiniband. 40G cards
>>> > > > > > > > > > > > > > > > > are pretty routine.
>>> > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > On Wed, Feb 27, 2013 at 3:45 PM, Thomas
>>> > > > > > > > > > > > > > > > > Wakefield <<twake at iges.org>> wrote:
>>> > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > I also get the same performance
>>> > > > > > > > > > > > > > > > > > running iozone for large file
>>> > > > > > > > > > > > > > > > > > sizes, iozone -u 1 -r 512k -s 2G -I
>>> > > > > > > > > > > > > > > > > > -F.
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > Large file IO is what I need the
>>> > > > > > > > > > > > > > > > > > system to do. I am just shocked at the
>>> > > > > > > > > > > > > > > > > > huge difference between local IO and
>>> > > > > > > > > > > > > > > > > > gluster client IO. I know there should
>>> > > > > > > > > > > > > > > > > > be some difference, but 10x is
>>> > > > > > > > > > > > > > > > > > unacceptable.
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > -Tom
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > On Feb 27, 2013, at 5:31 PM, Bryan
>>> > > > > > > > > > > > > > > > > > Whitehead <<driver at megahappy.net>>
>>> > > > > > > > > > > > > > > > > > wrote:
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > Every time you open/close a file or
>>> > > > > > > > > > > > > > > > > > > a directory you will have to wait
>>> > > > > > > > > > > > > > > > > > > for locks which take time. This is
>>> > > > > > > > > > > > > > > > > > > totally expected.
>>> > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > Why don't you share what you want to
>>> > > > > > > > > > > > > > > > > > > do? iozone benchmarks look like crap
>>> > > > > > > > > > > > > > > > > > > but serving qcow2 files to qemu
>>> > > > > > > > > > > > > > > > > > > works fantastic for me. What are you
>>> > > > > > > > > > > > > > > > > > > doing? Make a benchmark that does
>>> > > > > > > > > > > > > > > > > > > that. If you are going to have many
>>> > > > > > > > > > > > > > > > > > > files with a wide variety of sizes
>>> > > > > > > > > > > > > > > > > > > glusterfs/fuse might not be what you
>>> > > > > > > > > > > > > > > > > > > are looking for.
>>> > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > On Wed, Feb 27, 2013 at 12:56 PM,
>>> > > > > > > > > > > > > > > > > > > Thomas Wakefield
>>> > > > > > > > > > > > > > > > > > > <<twake at cola.iges.org>> wrote:
>>> > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > I have tested everything, small
>>> > > > > > > > > > > > > > > > > > > > and large files. I have used file
>>> > > > > > > > > > > > > > > > > > > > sizes ranging from 128k up to
>>> > > > > > > > > > > > > > > > > > > > multiple GB files. All the reads
>>> > > > > > > > > > > > > > > > > > > > are bad.
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > Here is a fairly exhaustive iozone
>>> > > > > > > > > > > > > > > > > > > > auto test:
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > random random bkwd record stride
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > KB reclen write rewrite read
>>> > > > > > > > > > > > > > > > > > > > reread read write read rewrite
>>> > > > > > > > > > > > > > > > > > > > read fwrite frewrite fread freread
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 64 4 40222 63492 26868 30060 1620
>>> > > > > > > > > > > > > > > > > > > > 71037 1572 70570 31294 77096 72475
>>> > > > > > > > > > > > > > > > > > > > 14736 13928
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 64 8 99207 116366 13591 13513 3214
>>> > > > > > > > > > > > > > > > > > > > 97690 3155 109978
>>> > > > > > > > > > > > > > > > > > > > <tel:3155%20%C2%A0%20109978> 28920
>>> > > > > > > > > > > > > > > > > > > > 152018 158480 18936 17625
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 64 16 230257 253766 25156 28713
>>> > > > > > > > > > > > > > > > > > > > 10867 223732 8873 244297 54796
>>> > > > > > > > > > > > > > > > > > > > 303383 312204 15062 13545
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 64 32 255943 234481 5735102
>>> > > > > > > > > > > > > > > > > > > > 7100397 11897 318502 13681 347801
>>> > > > > > > > > > > > > > > > > > > > 24214 695778 528618 25838 28094
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 64 64 214096 681644 6421025
>>> > > > > > > > > > > > > > > > > > > > 7100397 27453 292156 28117 621657
>>> > > > > > > > > > > > > > > > > > > > 27338 376062 512471 28569 32534
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 128 4 74329 75468 26428
>>> > > > > > > > > > > > > > > > > > > > <tel:75468%20%C2%A0%20%C2%A026428>
>>> > > > > > > > > > > > > > > > > > > > 41089 1131 72857 1118 66976 1597
>>> > > > > > > > > > > > > > > > > > > > 73778 78343 13351 13026
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 128 8 100862 135170 24966
>>> > > > > > > > > > > > > > > > > > > > <tel:135170%20%C2%A0%20%C2%A024966
>>> > > > > > > > > > > > > > > > > > > > > 16734 2617 118966 2560 120406
>>> > > > > > > > > > > > > > > > > > > > > 39156 125121 146613 16177 16180
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 128 16 115114 253983 28212 17854
>>> > > > > > > > > > > > > > > > > > > > 5307 246180 5431 229843 47335
>>> > > > > > > > > > > > > > > > > > > > 255920 271173 27256 24445
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 128 32 256042 391360 39848 64258
>>> > > > > > > > > > > > > > > > > > > > 11329 290230 9905 429563 38176
>>> > > > > > > > > > > > > > > > > > > > 490380 463696 20917 19219
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 128 64 248573 592699 4557257
>>> > > > > > > > > > > > > > > > > > > > 6812590 19583 452366 29263 603357
>>> > > > > > > > > > > > > > > > > > > > 42967 814915 692017 76327 37604
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 128 128 921183 526444 5603747
>>> > > > > > > > > > > > > > > > > > > > 5379161 45614 390222 65441 826202
>>> > > > > > > > > > > > > > > > > > > > 41384 662962 1040839 78526 39023
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 256 4 76212 77337 40295
>>> > > > > > > > > > > > > > > > > > > > <tel:77337%20%C2%A0%20%C2%A040295>
>>> > > > > > > > > > > > > > > > > > > > 32125 1289 71866 1261 64645 1436
>>> > > > > > > > > > > > > > > > > > > > 57309 53048 23073 29550
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 256 8 126922 141976 26237
>>> > > > > > > > > > > > > > > > > > > > <tel:141976%20%C2%A0%20%C2%A026237
>>> > > > > > > > > > > > > > > > > > > > > 25130 2566 128058 2565 138981
>>> > > > > > > > > > > > > > > > > > > > > <tel:2565%20%C2%A0%20138981>
>>> > > > > > > > > > > > > > > > > > > > > 2985 125060 133603 22840 24955
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 256 16 242883 263636 41850 24371
>>> > > > > > > > > > > > > > > > > > > > 4902 250009 5290 248792 89353
>>> > > > > > > > > > > > > > > > > > > > 243821 247303 26965 26199
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 256 32 409074 439732 40101 39335
>>> > > > > > > > > > > > > > > > > > > > 11953 436870 11209 430218 83743
>>> > > > > > > > > > > > > > > > > > > > 409542 479390 30821 27750
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 256 64 259935 571502 64840 71847
>>> > > > > > > > > > > > > > > > > > > > 22537 <tel:71847%20%C2%A0%2022537>
>>> > > > > > > > > > > > > > > > > > > > 617161 23383 392047 91852 672010
>>> > > > > > > > > > > > > > > > > > > > 802614 41673 53111
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 256 128 847597 812329 185517 83198
>>> > > > > > > > > > > > > > > > > > > > 49383 <tel:83198%20%C2%A0%2049383>
>>> > > > > > > > > > > > > > > > > > > > 708831 44668 794889 74267 1180188
>>> > > > > > > > > > > > > > > > > > > > 1662639 54303 41018
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 256 256 481324 709299 5217259
>>> > > > > > > > > > > > > > > > > > > > 5320671 44668 719277 40954 808050
>>> > > > > > > > > > > > > > > > > > > > 41302 790209 771473 62224 35754
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 512 4 77667 75226 35102 29696 1337
>>> > > > > > > > > > > > > > > > > > > > 66262 1451 67680 1413 69265 69142
>>> > > > > > > > > > > > > > > > > > > > 42084 27897
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 512 8 134311 144341 30144
>>> > > > > > > > > > > > > > > > > > > > <tel:144341%20%C2%A0%20%C2%A030144
>>> > > > > > > > > > > > > > > > > > > > > 24646 2102 134143 2209 134699
>>> > > > > > > > > > > > > > > > > > > > > 2296 108110 128616 25104 29123
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 512 16 200085 248787 30235 25697
>>> > > > > > > > > > > > > > > > > > > > 4196 247240 4179 256116
>>> > > > > > > > > > > > > > > > > > > > <tel:4179%20%C2%A0%20256116> 4768
>>> > > > > > > > > > > > > > > > > > > > 250003 226436 32351 28455
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 512 32 330341 439805 26440 39284
>>> > > > > > > > > > > > > > > > > > > > 8744 457611 8006 424168
>>> > > > > > > > > > > > > > > > > > > > <tel:8006%20%C2%A0%20424168>
>>> > > > > > > > > > > > > > > > > > > > 125953 425935 448813 27660 26951
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 512 64 483906 733729 48747 41121
>>> > > > > > > > > > > > > > > > > > > > 16032 555938 17424 587256 187343
>>> > > > > > > > > > > > > > > > > > > > 366977 735740 41700 41548
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 512 128 836636 907717 69359 94921
>>> > > > > > > > > > > > > > > > > > > > 42443 <tel:94921%20%C2%A0%2042443>
>>> > > > > > > > > > > > > > > > > > > > 761031 36828 964378 123165 651383
>>> > > > > > > > > > > > > > > > > > > > 695697 58368 44459
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 512 256 520879 860437 145534
>>> > > > > > > > > > > > > > > > > > > > 135523 40267 847532 31585 663252
>>> > > > > > > > > > > > > > > > > > > > 69696 1270846 1492545 48822 48092
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 512 512 782951 973118 3099691
>>> > > > > > > > > > > > > > > > > > > > 2942541 42328 871966 46218 911184
>>> > > > > > > > > > > > > > > > > > > > 49791 953248 1036527 52723 48347
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 1024 4 76218 69362 36431 28711
>>> > > > > > > > > > > > > > > > > > > > 1137 66171 1174 68938 1125 70566
>>> > > > > > > > > > > > > > > > > > > > 70845 34942 28914
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 1024 8 126045 140524 37836
>>> > > > > > > > > > > > > > > > > > > > <tel:140524%20%C2%A0%20%C2%A037836
>>> > > > > > > > > > > > > > > > > > > > > 15664 2698 126000 2557 125566
>>> > > > > > > > > > > > > > > > > > > > > 2567 110858 127255 26764 27945
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 1024 16 243398 261429 40238 23263
>>> > > > > > > > > > > > > > > > > > > > 3987 246400 3882 260746 4093
>>> > > > > > > > > > > > > > > > > > > > 236652 236874 31429 25076
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 1024 32 383109 422076 41731 41605
>>> > > > > > > > > > > > > > > > > > > > 8277 473441 7775 415261 8588
>>> > > > > > > > > > > > > > > > > > > > 394765 407306 40089 28537
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 1024 64 590145 619156 39623 53267
>>> > > > > > > > > > > > > > > > > > > > 15051 722717 14624 753000 257294
>>> > > > > > > > > > > > > > > > > > > > 597784 620946 38619 44073
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 1024 128 1077836 1124099 56192
>>> > > > > > > > > > > > > > > > > > > > <tel:1124099%20%C2%A0%20%C2%A05619
>>> > > > > > > > > > > > > > > > > > > > 2> 64916 36851 1102176 37198
>>> > > > > > > > > > > > > > > > > > > > 1082454 281548 829175 792604 47975
>>> > > > > > > > > > > > > > > > > > > > 51913
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 1024 256 941918 1074331 72783
>>> > > > > > > > > > > > > > > > > > > > 81450 26778
>>> > > > > > > > > > > > > > > > > > > > <tel:81450%20%C2%A0%2026778>
>>> > > > > > > > > > > > > > > > > > > > 1099636 32395 1060013 183218
>>> > > > > > > > > > > > > > > > > > > > 1024121 995171 44371 45448
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 1024 512 697483 1130312 100324
>>> > > > > > > > > > > > > > > > > > > > 114682 48215 1041758 41480 1058967
>>> > > > > > > > > > > > > > > > > > > > 90156 994020 1563622 56328 46370
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 1024 1024 931702 1087111 4609294
>>> > > > > > > > > > > > > > > > > > > > 4199201 44191 949834 45594 970656
>>> > > > > > > > > > > > > > > > > > > > 56674 933525 1075676 44876 46115
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 2048 4 71438 67066 58319 38913
>>> > > > > > > > > > > > > > > > > > > > 1147 44147 1043 42916 967 66416
>>> > > > > > > > > > > > > > > > > > > > 67205 45953 96750
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 2048 8 141926 134567 61101 55445
>>> > > > > > > > > > > > > > > > > > > > 2596 77528 2564 80402 4258 124211
>>> > > > > > > > > > > > > > > > > > > > 120747 53888 100337
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 2048 16 254344 255585 71550 74500
>>> > > > > > > > > > > > > > > > > > > > 5410 139365 5201 141484 5171
>>> > > > > > > > > > > > > > > > > > > > 205521 213113 67048 57304
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 2048 32 397833 411261 56676 80027
>>> > > > > > > > > > > > > > > > > > > > 10440 <tel:80027%20%C2%A0%2010440>
>>> > > > > > > > > > > > > > > > > > > > 260034 10126 230238 10814 391665
>>> > > > > > > > > > > > > > > > > > > > 383379 79333 60877
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 2048 64 595167 687205 64262 87327
>>> > > > > > > > > > > > > > > > > > > > 20772 <tel:87327%20%C2%A0%2020772>
>>> > > > > > > > > > > > > > > > > > > > 456430 19960 477064 23190 540220
>>> > > > > > > > > > > > > > > > > > > > 563096 86812 92565
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 2048 128 833585 933403 121926
>>> > > > > > > > > > > > > > > > > > > > 118621 37700 690020 37575 733254
>>> > > > > > > > > > > > > > > > > > > > 567449 712337 734006 92011 104934
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 2048 256 799003 949499 143688
>>> > > > > > > > > > > > > > > > > > > > 125659 40871
>>> > > > > > > > > > > > > > > > > > > > <tel:125659%20%C2%A0%2040871>
>>> > > > > > > > > > > > > > > > > > > > 892757 37977 880494 458281 836263
>>> > > > > > > > > > > > > > > > > > > > 901375 131332 110237
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 2048 512 979936 1040724 120896
>>> > > > > > > > > > > > > > > > > > > > 138013 54381 859783 48721 780491
>>> > > > > > > > > > > > > > > > > > > > 279203 1068824 1087085 97886 98078
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 2048 1024 901754 987938 53352
>>> > > > > > > > > > > > > > > > > > > > 53043 72727
>>> > > > > > > > > > > > > > > > > > > > <tel:53043%20%C2%A0%2072727>
>>> > > > > > > > > > > > > > > > > > > > 1054522 68269 992275 181253
>>> > > > > > > > > > > > > > > > > > > > 1309480 1524983 121600 95585
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 2048 2048 831890 1021540 4257067
>>> > > > > > > > > > > > > > > > > > > > 3302797 75672 984203 80181 826209
>>> > > > > > > > > > > > > > > > > > > > 94278 966920 1027159 111832 105921
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 4096 4 66195 67316 62171 74785
>>> > > > > > > > > > > > > > > > > > > > 1328 28963 1329 26397 1223 71470
>>> > > > > > > > > > > > > > > > > > > > 69317 55903 84915
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 4096 8 122221 120057 90537 60958
>>> > > > > > > > > > > > > > > > > > > > 2598 47312 2468 59783 2640 128674
>>> > > > > > > > > > > > > > > > > > > > 127872 41285 40422
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 4096 16 238321 239251 29336 32121
>>> > > > > > > > > > > > > > > > > > > > 4153 89262 3986 96930 4608 229970
>>> > > > > > > > > > > > > > > > > > > > 237108 55039 56983
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 4096 32 417110 421356 30974 50000
>>> > > > > > > > > > > > > > > > > > > > 8382 156676 7886 153841 7900
>>> > > > > > > > > > > > > > > > > > > > 359585 367288 26611 25952
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 4096 64 648008 668066 32193 29389
>>> > > > > > > > > > > > > > > > > > > > 14830 273265 14822 282211 19653
>>> > > > > > > > > > > > > > > > > > > > 581898 620798 51281 50218
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 4096 128 779422 848564 55594 60253
>>> > > > > > > > > > > > > > > > > > > > 37108 <tel:60253%20%C2%A0%2037108>
>>> > > > > > > > > > > > > > > > > > > > 451296 35908 491361 37567 738163
>>> > > > > > > > > > > > > > > > > > > > 728059 67681 66440
>>> > > > > > > > > > > > > > > > > > > > 
>>> > > > > > > > > > > > > > > > > > > > 4096 256 865623 886986 71368 63947
>>> > > > > > > > > > > > > > > > > > > > 44255 <tel:63947%20%C2%A0%2044255>
>>> > > > > > > > > > > > > > > > > > > > 645961 42689 719491 736707 819696
>>> > > > > > > > > > > > > > > > > > > > 837641 57059 60347
>>> > > > > > > > > > > > > > > > > > > > 
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>>> > > ...
>>> > > 
>>> > > [Message clipped]
>>> > 
>>> > 
>>> 
> 
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