[Gluster-users] Performance drop when upgrading from 3.8 to 6.5

Riccardo Murri riccardo.murri at gmail.com
Mon Nov 4 09:11:42 UTC 2019


Hello Amar,

> Can you please check the profile info [1]  ? That may give some hints.

I am attaching the output of `sudo gluster volume profile info` as a text file
to preserve formatting.  This covers the time from Friday night to
Monday morning;
during this time the cluster has been the target of a an `rsync` command copying
a large directory tree (14TB; it's taking more than 2 weeks now...).

My take from cursorily reading the profile:

- metadata operations (opendir, create, rename) seem to have very high
latency (up to 25 seconds for a rename!)
- large block size (>128kB) are rare; most blocks seems to be 8kB,
16kB, or 128kB.

I personally do not see any obvious culprit or optimization
opportunities; is there something I'm missing out that catches the eye
of someone more experienced?

Thanks,
R
-------------- next part --------------
$ sudo gluster volume profile glusterfs info
Brick: glusterfs-server-001:/srv/glusterfs
------------------------------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+
 No. of Reads:                    2                    18                    12
No. of Writes:                   47                    15                    22

   Block Size:                 16b+                  32b+                  64b+
 No. of Reads:                   31                    77                   336
No. of Writes:                   65                  7869                 47979

   Block Size:                128b+                 256b+                 512b+
 No. of Reads:                  291                   648                  1125
No. of Writes:                 8909                125293                 62952

   Block Size:               1024b+                2048b+                4096b+
 No. of Reads:                 2054                  3868                  7903
No. of Writes:                11728                293386                 87850

   Block Size:               8192b+               16384b+               32768b+
 No. of Reads:                16084                 35981                 66646
No. of Writes:             10758668               6852707                289622

   Block Size:              65536b+              131072b+              262144b+
 No. of Reads:               128659              15220392                     0
No. of Writes:               239551              12723330                   316

 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         760721      FORGET
      0.00       0.00 us       0.00 us       0.00 us         877203     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00   16174.60 us     554.21 us   31794.98 us              2    READDIRP
      0.00     185.11 us      82.75 us     660.68 us            377        OPEN
      0.00   95974.52 us   95974.52 us   95974.52 us              1     OPENDIR
      0.01   59611.16 us     444.39 us  160460.53 us              3     SYMLINK
      0.01     217.87 us      72.47 us   15655.59 us           1337    SETXATTR
      0.30      79.48 us      16.15 us    6242.48 us         123275       FLUSH
      0.31     120.49 us      30.68 us   10641.08 us          83225       FSTAT
      0.50   12161.43 us     273.52 us  298385.31 us           1337       MKDIR
      0.86     129.11 us      32.64 us    9029.93 us         216678      STATFS
      1.35      89.34 us      12.29 us   16695.73 us         491862     ENTRYLK
      2.09      91.83 us      11.85 us   20615.78 us         737946     INODELK
      2.38     628.28 us     115.01 us 25374396.01 us         122889      RENAME
      2.42    2080.96 us      36.39 us  403164.19 us          37810        READ
      2.74     179.20 us      49.63 us 1041137.91 us         497183     SETATTR
      6.34     154.95 us      33.60 us   17451.12 us        1329171        STAT
     11.35     201.91 us      31.14 us  181613.31 us        1824910      LOOKUP
     28.65    7568.96 us     169.02 us 1888964.31 us         122898      CREATE
     40.68     517.99 us      58.77 us 1076940.31 us        2549418       WRITE

    Duration: 2936614 seconds
   Data Read: 2012268179193 bytes
Data Written: 2005120204522 bytes

Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+
 No. of Reads:                    2                    18                    12
No. of Writes:                   47                    15                    22

   Block Size:                 16b+                  32b+                  64b+
 No. of Reads:                   31                    77                   336
No. of Writes:                   65                  7869                 47979

   Block Size:                128b+                 256b+                 512b+
 No. of Reads:                  291                   648                  1125
No. of Writes:                 8909                125293                 62952

   Block Size:               1024b+                2048b+                4096b+
 No. of Reads:                 2054                  3868                  7903
No. of Writes:                11728                293386                 87850

   Block Size:               8192b+               16384b+               32768b+
 No. of Reads:                16084                 35981                 66646
No. of Writes:             10758668               6852707                289622

   Block Size:              65536b+              131072b+              262144b+
 No. of Reads:               128659              15220392                     0
No. of Writes:               239551              12723330                   316

 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         760721      FORGET
      0.00       0.00 us       0.00 us       0.00 us         877203     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00   16174.60 us     554.21 us   31794.98 us              2    READDIRP
      0.00     185.11 us      82.75 us     660.68 us            377        OPEN
      0.00   95974.52 us   95974.52 us   95974.52 us              1     OPENDIR
      0.01   59611.16 us     444.39 us  160460.53 us              3     SYMLINK
      0.01     217.87 us      72.47 us   15655.59 us           1337    SETXATTR
      0.30      79.48 us      16.15 us    6242.48 us         123275       FLUSH
      0.31     120.49 us      30.68 us   10641.08 us          83225       FSTAT
      0.50   12161.43 us     273.52 us  298385.31 us           1337       MKDIR
      0.86     129.11 us      32.64 us    9029.93 us         216678      STATFS
      1.35      89.34 us      12.29 us   16695.73 us         491862     ENTRYLK
      2.09      91.83 us      11.85 us   20615.78 us         737946     INODELK
      2.38     628.28 us     115.01 us 25374396.01 us         122889      RENAME
      2.42    2081.07 us      36.39 us  403164.19 us          37810        READ
      2.74     179.20 us      49.63 us 1041137.91 us         497183     SETATTR
      6.34     154.95 us      33.60 us   17451.12 us        1329171        STAT
     11.35     201.91 us      31.14 us  181613.31 us        1824910      LOOKUP
     28.65    7568.96 us     169.02 us 1888964.31 us         122898      CREATE
     40.68     517.99 us      58.77 us 1076940.31 us        2549418       WRITE

    Duration: 2936614 seconds
   Data Read: 2012268179193 bytes
Data Written: 2005120204522 bytes

Brick: glusterfs-server-003:/srv/glusterfs
------------------------------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+
 No. of Reads:                    0                     1                     5
No. of Writes:                    4                    31                     9

   Block Size:                  8b+                  16b+                  32b+
 No. of Reads:                    9                    34                    46
No. of Writes:                   24                    49                  7817

   Block Size:                 64b+                 128b+                 256b+
 No. of Reads:                  206                   267                   630
No. of Writes:                47976                  8879                125845

   Block Size:                512b+                1024b+                2048b+
 No. of Reads:                 1037                  1984                  3824
No. of Writes:                63261                 11876                295271

   Block Size:               4096b+                8192b+               16384b+
 No. of Reads:                 7792                 15801                 35586
No. of Writes:                88129              10823535               6852962

   Block Size:              32768b+               65536b+              131072b+
 No. of Reads:                67883                129953              15451758
No. of Writes:               290421                246054              12704001

   Block Size:             262144b+
 No. of Reads:                    0
No. of Writes:                  298
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         760063      FORGET
      0.00       0.00 us       0.00 us       0.00 us         878086     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00   23734.89 us   23734.89 us   23734.89 us              1    READLINK
      0.00   30289.28 us   30289.28 us   30289.28 us              1     OPENDIR
      0.00   13991.48 us     395.61 us   41106.22 us              3     SYMLINK
      0.00     208.58 us      97.11 us     696.62 us            369        OPEN
      0.00   63746.13 us     323.04 us  127169.22 us              2    READDIRP
      0.01     234.57 us      83.38 us    2983.54 us           1337    SETXATTR
      0.32     122.63 us      34.38 us    7160.49 us          82807       FSTAT
      0.33      84.07 us      16.33 us    1068.90 us         122557       FLUSH
      0.58   13565.91 us     180.57 us  859005.00 us           1337       MKDIR
      0.93     134.33 us      33.54 us   12274.34 us         216677      STATFS
      1.51      96.50 us      14.75 us   18505.08 us         489054     ENTRYLK
      1.54     393.63 us     104.09 us  934883.44 us         122178      RENAME
      2.24    2067.85 us      45.97 us  300114.83 us          33824        READ
      2.31      98.57 us      15.30 us   20739.38 us         733752     INODELK
      2.87     181.67 us      48.51 us  362666.29 us         494340     SETATTR
      6.33     148.89 us      33.34 us   12370.01 us        1328847        STAT
     12.08     207.40 us      29.84 us  185863.09 us        1820818      LOOKUP
     28.29    7237.59 us     163.85 us  870990.45 us         122188      CREATE
     40.65     501.44 us      53.64 us 1029279.61 us        2534634       WRITE

    Duration: 2936613 seconds
   Data Read: 2042771607327 bytes
Data Written: 2004299986154 bytes

Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+
 No. of Reads:                    0                     1                     5
No. of Writes:                    4                    31                     9

   Block Size:                  8b+                  16b+                  32b+
 No. of Reads:                    9                    34                    46
No. of Writes:                   24                    49                  7817

   Block Size:                 64b+                 128b+                 256b+
 No. of Reads:                  206                   267                   630
No. of Writes:                47976                  8879                125845

   Block Size:                512b+                1024b+                2048b+
 No. of Reads:                 1037                  1984                  3824
No. of Writes:                63261                 11876                295271

   Block Size:               4096b+                8192b+               16384b+
 No. of Reads:                 7792                 15801                 35586
No. of Writes:                88129              10823535               6852962

   Block Size:              32768b+               65536b+              131072b+
 No. of Reads:                67883                129953              15451758
No. of Writes:               290421                246054              12704001

   Block Size:             262144b+
 No. of Reads:                    0
No. of Writes:                  298
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         760063      FORGET
      0.00       0.00 us       0.00 us       0.00 us         878086     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00   23734.89 us   23734.89 us   23734.89 us              1    READLINK
      0.00   30289.28 us   30289.28 us   30289.28 us              1     OPENDIR
      0.00   13991.48 us     395.61 us   41106.22 us              3     SYMLINK
      0.00     208.58 us      97.11 us     696.62 us            369        OPEN
      0.00   63746.13 us     323.04 us  127169.22 us              2    READDIRP
      0.01     234.57 us      83.38 us    2983.54 us           1337    SETXATTR
      0.32     122.63 us      34.38 us    7160.49 us          82807       FSTAT
      0.33      84.07 us      16.33 us    1068.90 us         122557       FLUSH
      0.58   13565.91 us     180.57 us  859005.00 us           1337       MKDIR
      0.93     134.33 us      33.54 us   12274.34 us         216677      STATFS
      1.51      96.50 us      14.75 us   18505.08 us         489054     ENTRYLK
      1.54     393.63 us     104.09 us  934883.44 us         122178      RENAME
      2.24    2067.85 us      45.97 us  300114.83 us          33824        READ
      2.31      98.57 us      15.30 us   20739.38 us         733752     INODELK
      2.87     181.67 us      48.51 us  362666.29 us         494340     SETATTR
      6.33     148.89 us      33.34 us   12370.01 us        1328847        STAT
     12.08     207.40 us      29.84 us  185863.09 us        1820818      LOOKUP
     28.29    7237.59 us     163.85 us  870990.45 us         122188      CREATE
     40.65     501.44 us      53.64 us 1029279.61 us        2534634       WRITE

    Duration: 2936613 seconds
   Data Read: 2042771607327 bytes
Data Written: 2004299986154 bytes

Brick: glusterfs-server-007:/srv/glusterfs
------------------------------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+
 No. of Reads:                    0                     1                     3
No. of Writes:                    2                    47                     7

   Block Size:                  8b+                  16b+                  32b+
 No. of Reads:                    9                    48                    49
No. of Writes:                   11                    62                  7773

   Block Size:                 64b+                 128b+                 256b+
 No. of Reads:                  151                   220                   509
No. of Writes:                46782                  8282                124151

   Block Size:                512b+                1024b+                2048b+
 No. of Reads:                 1051                  2040                  3960
No. of Writes:                61178                 11270                293665

   Block Size:               4096b+                8192b+               16384b+
 No. of Reads:                 7421                 15965                 35941
No. of Writes:                87812              10819486               6800022

   Block Size:              32768b+               65536b+              131072b+
 No. of Reads:                67354                128628              15259778
No. of Writes:               291441                240144              12720415

   Block Size:             262144b+
 No. of Reads:                    0
No. of Writes:                  285
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         760010      FORGET
      0.00       0.00 us       0.00 us       0.00 us         875188     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00    1946.15 us    1946.15 us    1946.15 us              1    READLINK
      0.00     200.95 us     102.51 us     707.02 us            335        OPEN
      0.00   86756.14 us   86756.14 us   86756.14 us              1     OPENDIR
      0.00   44438.95 us     379.52 us   88498.38 us              2     SYMLINK
      0.01   88459.57 us      97.37 us  176821.77 us              2    READDIRP
      0.01     251.07 us      61.35 us    1497.62 us           1337    SETXATTR
      0.31     123.73 us      34.00 us    6948.27 us          82822       FSTAT
      0.32      85.83 us      16.27 us    6444.86 us         123010       FLUSH
      0.58   14363.95 us     178.44 us  847451.60 us           1337       MKDIR
      0.90     137.14 us      32.48 us    9572.80 us         216677      STATFS
      1.48      99.27 us      12.80 us   18204.06 us         491038     ENTRYLK
      2.03    2069.17 us      39.37 us  305857.53 us          32278        READ
      2.28     101.63 us      12.83 us   32912.17 us         736744     INODELK
      2.81     186.13 us      44.12 us  531739.19 us         496287     SETATTR
      3.82    1024.47 us     107.60 us 78557223.60 us         122666      RENAME
      6.26     154.70 us      33.96 us   17842.98 us        1329298        STAT
     11.86     213.83 us      29.83 us  287648.96 us        1823022      LOOKUP
     28.35    7592.49 us     175.50 us 2709284.15 us         122675      CREATE
     38.95     501.36 us      54.27 us  827604.51 us        2552878       WRITE

    Duration: 2936614 seconds
   Data Read: 2017467234933 bytes
Data Written: 2004757317618 bytes

Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+
 No. of Reads:                    0                     1                     3
No. of Writes:                    2                    47                     7

   Block Size:                  8b+                  16b+                  32b+
 No. of Reads:                    9                    48                    49
No. of Writes:                   11                    62                  7773

   Block Size:                 64b+                 128b+                 256b+
 No. of Reads:                  151                   220                   509
No. of Writes:                46782                  8282                124151

   Block Size:                512b+                1024b+                2048b+
 No. of Reads:                 1051                  2040                  3960
No. of Writes:                61178                 11270                293665

   Block Size:               4096b+                8192b+               16384b+
 No. of Reads:                 7421                 15965                 35941
No. of Writes:                87812              10819486               6800022

   Block Size:              32768b+               65536b+              131072b+
 No. of Reads:                67354                128628              15259778
No. of Writes:               291441                240144              12720415

   Block Size:             262144b+
 No. of Reads:                    0
No. of Writes:                  285
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         760010      FORGET
      0.00       0.00 us       0.00 us       0.00 us         875188     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00    1946.15 us    1946.15 us    1946.15 us              1    READLINK
      0.00     200.95 us     102.51 us     707.02 us            335        OPEN
      0.00   86756.14 us   86756.14 us   86756.14 us              1     OPENDIR
      0.00   44438.95 us     379.52 us   88498.38 us              2     SYMLINK
      0.01   88459.57 us      97.37 us  176821.77 us              2    READDIRP
      0.01     251.07 us      61.35 us    1497.62 us           1337    SETXATTR
      0.31     123.73 us      34.00 us    6948.27 us          82822       FSTAT
      0.32      85.83 us      16.27 us    6444.86 us         123010       FLUSH
      0.58   14363.95 us     178.44 us  847451.60 us           1337       MKDIR
      0.90     137.14 us      32.48 us    9572.80 us         216677      STATFS
      1.48      99.27 us      12.80 us   18204.06 us         491038     ENTRYLK
      2.03    2069.17 us      39.37 us  305857.53 us          32278        READ
      2.28     101.63 us      12.83 us   32912.17 us         736744     INODELK
      2.81     186.13 us      44.12 us  531739.19 us         496287     SETATTR
      3.82    1024.47 us     107.60 us 78557223.60 us         122666      RENAME
      6.26     154.70 us      33.96 us   17842.98 us        1329298        STAT
     11.86     213.83 us      29.83 us  287648.96 us        1823022      LOOKUP
     28.35    7592.49 us     175.50 us 2709284.15 us         122675      CREATE
     38.95     501.36 us      54.27 us  827604.51 us        2552878       WRITE

    Duration: 2936614 seconds
   Data Read: 2017467234933 bytes
Data Written: 2004757317618 bytes

Brick: glusterfs-server-008:/srv/glusterfs
------------------------------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+
 No. of Reads:                    0                     0                    11
No. of Writes:                    4                    43                    15

   Block Size:                  8b+                  16b+                  32b+
 No. of Reads:                    6                    32                    51
No. of Writes:                   21                    57                  7604

   Block Size:                 64b+                 128b+                 256b+
 No. of Reads:                  139                   245                   601
No. of Writes:                47400                  9309                126614

   Block Size:                512b+                1024b+                2048b+
 No. of Reads:                 1017                  2053                  4007
No. of Writes:                63836                 12996                294860

   Block Size:               4096b+                8192b+               16384b+
 No. of Reads:                 7724                 16240                 35266
No. of Writes:                87834              10853140               6829372

   Block Size:              32768b+               65536b+              131072b+
 No. of Reads:                66488                130659              14994967
No. of Writes:               293071                239905              12697661

   Block Size:             262144b+
 No. of Reads:                    0
No. of Writes:                  266
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         760943      FORGET
      0.00       0.00 us       0.00 us       0.00 us         877102     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00     511.87 us     442.51 us     581.23 us              2     SYMLINK
      0.00   46748.86 us   46748.86 us   46748.86 us              1    READDIRP
      0.00   54050.56 us   54050.56 us   54050.56 us              1     OPENDIR
      0.00     228.24 us     113.08 us    6740.27 us            373        OPEN
      0.01     242.70 us      90.66 us   25274.55 us           1337    SETXATTR
      0.30     124.10 us      37.85 us    6147.92 us          82847       FSTAT
      0.31      86.38 us      15.04 us    5570.68 us         123282       FLUSH
      0.48   12392.41 us     217.67 us  648607.98 us           1337       MKDIR
      0.89     140.06 us      33.20 us    7281.76 us         216677      STATFS
      1.33     370.67 us     105.93 us  620038.23 us         122896      RENAME
      1.45     101.11 us      14.63 us   16161.03 us         491928     ENTRYLK
      2.21     102.51 us      13.86 us   19717.11 us         738064     INODELK
      2.31    2165.83 us      39.52 us  456893.32 us          36607        READ
      2.69     185.79 us      51.46 us   69209.88 us         497214     SETATTR
      6.00     154.61 us      34.94 us   31242.32 us        1329565        STAT
     11.39     214.05 us      30.74 us  541340.40 us        1824942      LOOKUP
     33.10    9233.79 us     171.40 us 88679990.55 us         122910      CREATE
     37.52     500.98 us      53.60 us  800953.46 us        2567932       WRITE

    Duration: 2936613 seconds
   Data Read: 1982870875754 bytes
Data Written: 2002756853576 bytes

Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+
 No. of Reads:                    0                     0                    11
No. of Writes:                    4                    43                    15

   Block Size:                  8b+                  16b+                  32b+
 No. of Reads:                    6                    32                    51
No. of Writes:                   21                    57                  7604

   Block Size:                 64b+                 128b+                 256b+
 No. of Reads:                  139                   245                   601
No. of Writes:                47400                  9309                126614

   Block Size:                512b+                1024b+                2048b+
 No. of Reads:                 1017                  2053                  4007
No. of Writes:                63836                 12996                294860

   Block Size:               4096b+                8192b+               16384b+
 No. of Reads:                 7724                 16240                 35266
No. of Writes:                87834              10853140               6829372

   Block Size:              32768b+               65536b+              131072b+
 No. of Reads:                66488                130659              14994967
No. of Writes:               293071                239905              12697661

   Block Size:             262144b+
 No. of Reads:                    0
No. of Writes:                  266
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         760943      FORGET
      0.00       0.00 us       0.00 us       0.00 us         877102     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00     511.87 us     442.51 us     581.23 us              2     SYMLINK
      0.00   46748.86 us   46748.86 us   46748.86 us              1    READDIRP
      0.00   54050.56 us   54050.56 us   54050.56 us              1     OPENDIR
      0.00     228.24 us     113.08 us    6740.27 us            373        OPEN
      0.01     242.70 us      90.66 us   25274.55 us           1337    SETXATTR
      0.30     124.10 us      37.85 us    6147.92 us          82847       FSTAT
      0.31      86.38 us      15.04 us    5570.68 us         123282       FLUSH
      0.48   12392.41 us     217.67 us  648607.98 us           1337       MKDIR
      0.89     140.06 us      33.20 us    7281.76 us         216677      STATFS
      1.33     370.67 us     105.93 us  620038.23 us         122896      RENAME
      1.45     101.11 us      14.63 us   16161.03 us         491928     ENTRYLK
      2.21     102.51 us      13.86 us   19717.11 us         738064     INODELK
      2.31    2165.83 us      39.52 us  456893.32 us          36607        READ
      2.69     185.79 us      51.46 us   69209.88 us         497214     SETATTR
      6.00     154.61 us      34.94 us   31242.32 us        1329565        STAT
     11.39     214.05 us      30.74 us  541340.40 us        1824942      LOOKUP
     33.10    9233.79 us     171.40 us 88679990.55 us         122910      CREATE
     37.52     500.98 us      53.60 us  800953.46 us        2567932       WRITE

    Duration: 2936613 seconds
   Data Read: 1982870875754 bytes
Data Written: 2002756853576 bytes

Brick: glusterfs-server-002:/srv/glusterfs
------------------------------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+
 No. of Reads:                    0                     4                     5
No. of Writes:                    6                    44                     8

   Block Size:                  8b+                  16b+                  32b+
 No. of Reads:                   10                    29                    63
No. of Writes:                   14                    54                  7727

   Block Size:                 64b+                 128b+                 256b+
 No. of Reads:                  217                   256                   614
No. of Writes:                47383                  8560                124718

   Block Size:                512b+                1024b+                2048b+
 No. of Reads:                  999                  2174                  4160
No. of Writes:                62177                 11292                293569

   Block Size:               4096b+                8192b+               16384b+
 No. of Reads:                 7867                 16054                 35775
No. of Writes:                87716              10789835               6831300

   Block Size:              32768b+               65536b+              131072b+
 No. of Reads:                66988                129409              15315216
No. of Writes:               291029                240118              12700481

   Block Size:             262144b+
 No. of Reads:                    0
No. of Writes:                  286
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         760249      FORGET
      0.00       0.00 us       0.00 us       0.00 us         878245     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00     550.43 us     550.43 us     550.43 us              1     OPENDIR
      0.00   46921.21 us   46921.21 us   46921.21 us              1    READDIRP
      0.00     199.36 us      78.62 us     858.20 us            358        OPEN
      0.01     227.48 us      63.02 us    1406.38 us           1337    SETXATTR
      0.01  106036.10 us     379.00 us  407187.84 us              4     SYMLINK
      0.31     122.72 us      34.01 us    6661.97 us          82581       FSTAT
      0.32      83.14 us      16.66 us    6999.97 us         122609       FLUSH
      0.56   13474.57 us     225.70 us  831509.75 us           1337       MKDIR
      0.91     136.00 us      32.69 us    8138.46 us         216677      STATFS
      1.45     382.74 us     114.83 us  906798.58 us         122241      RENAME
      1.46      96.79 us      14.17 us   20609.26 us         489278     ENTRYLK
      2.27     100.04 us      11.86 us   24366.52 us         734074     INODELK
      2.36    2380.77 us      38.86 us  596570.69 us          32071        READ
      2.93     191.83 us      52.47 us 1098174.76 us         494594     SETATTR
      6.40     155.75 us      34.02 us   15763.39 us        1329122        STAT
     11.85     210.48 us      30.96 us  216326.61 us        1821062      LOOKUP
     28.77    7612.00 us     163.44 us 1490314.45 us         122251      CREATE
     40.38     513.68 us      56.02 us 1426464.65 us        2543049       WRITE

    Duration: 2936613 seconds
   Data Read: 2024792095578 bytes
Data Written: 2002323867368 bytes

Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+
 No. of Reads:                    0                     4                     5
No. of Writes:                    6                    44                     8

   Block Size:                  8b+                  16b+                  32b+
 No. of Reads:                   10                    29                    63
No. of Writes:                   14                    54                  7727

   Block Size:                 64b+                 128b+                 256b+
 No. of Reads:                  217                   256                   614
No. of Writes:                47383                  8560                124718

   Block Size:                512b+                1024b+                2048b+
 No. of Reads:                  999                  2174                  4160
No. of Writes:                62177                 11292                293569

   Block Size:               4096b+                8192b+               16384b+
 No. of Reads:                 7867                 16054                 35775
No. of Writes:                87716              10789835               6831300

   Block Size:              32768b+               65536b+              131072b+
 No. of Reads:                66988                129409              15315216
No. of Writes:               291029                240118              12700481

   Block Size:             262144b+
 No. of Reads:                    0
No. of Writes:                  286
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         760249      FORGET
      0.00       0.00 us       0.00 us       0.00 us         878245     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00     550.43 us     550.43 us     550.43 us              1     OPENDIR
      0.00   46921.21 us   46921.21 us   46921.21 us              1    READDIRP
      0.00     199.36 us      78.62 us     858.20 us            358        OPEN
      0.01     227.48 us      63.02 us    1406.38 us           1337    SETXATTR
      0.01  106036.10 us     379.00 us  407187.84 us              4     SYMLINK
      0.31     122.72 us      34.01 us    6661.97 us          82581       FSTAT
      0.32      83.14 us      16.66 us    6999.97 us         122609       FLUSH
      0.56   13474.57 us     225.70 us  831509.75 us           1337       MKDIR
      0.91     136.00 us      32.69 us    8138.46 us         216677      STATFS
      1.45     382.74 us     114.83 us  906798.58 us         122241      RENAME
      1.46      96.79 us      14.17 us   20609.26 us         489278     ENTRYLK
      2.27     100.04 us      11.86 us   24366.52 us         734074     INODELK
      2.36    2380.71 us      38.86 us  596570.69 us          32071        READ
      2.93     191.83 us      52.47 us 1098174.76 us         494594     SETATTR
      6.40     155.75 us      34.02 us   15763.39 us        1329122        STAT
     11.85     210.48 us      30.96 us  216326.61 us        1821062      LOOKUP
     28.77    7612.00 us     163.44 us 1490314.45 us         122251      CREATE
     40.38     513.68 us      56.02 us 1426464.65 us        2543049       WRITE

    Duration: 2936613 seconds
   Data Read: 2024792095578 bytes
Data Written: 2002323867368 bytes

Brick: glusterfs-server-005:/srv/glusterfs
------------------------------------------------------
Cumulative Stats:
   Block Size:                  2b+                   4b+                   8b+
 No. of Reads:                    4                     3                     7
No. of Writes:                   52                    16                    19

   Block Size:                 16b+                  32b+                  64b+
 No. of Reads:                   33                    53                   169
No. of Writes:                   49                  7913                 48095

   Block Size:                128b+                 256b+                 512b+
 No. of Reads:                  215                   571                  1019
No. of Writes:                 9528                125591                 63575

   Block Size:               1024b+                2048b+                4096b+
 No. of Reads:                 2026                  3756                  7697
No. of Writes:                11496                293277                 87768

   Block Size:               8192b+               16384b+               32768b+
 No. of Reads:                15833                 35386                 67097
No. of Writes:             10764933               6849111                289233

   Block Size:              65536b+              131072b+              262144b+
 No. of Reads:               129816              15330275                     0
No. of Writes:               239469              12697465                   324

 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         761089      FORGET
      0.00       0.00 us       0.00 us       0.00 us         877250     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00   27055.56 us   27055.56 us   27055.56 us              1     OPENDIR
      0.00   14055.61 us     418.00 us   53534.63 us              4     SYMLINK
      0.00     205.56 us      99.61 us     988.66 us            348        OPEN
      0.00   53888.73 us     272.35 us  107505.10 us              2    READDIRP
      0.01     352.22 us      95.36 us  146156.03 us           1337    SETXATTR
      0.28      82.27 us      14.07 us    5471.66 us         123111       FLUSH
      0.28     122.98 us      36.31 us   10769.50 us          83127       FSTAT
      0.50   13730.50 us     249.06 us 1510813.17 us           1337       MKDIR
      0.81     135.81 us      25.37 us    8437.55 us         216677      STATFS
      1.22     363.33 us     115.19 us  702658.13 us         122751      RENAME
      1.30      96.66 us      15.12 us   18893.15 us         491322     ENTRYLK
      1.96    2094.11 us      42.38 us  359704.68 us          34240        READ
      1.99      98.62 us      14.67 us   16834.50 us         737142     INODELK
      2.49     183.33 us      49.59 us  293925.11 us         496634     SETATTR
      5.51     151.39 us      34.18 us   19410.12 us        1329114        STAT
     10.98     208.37 us      30.23 us  305491.07 us        1924121      LOOKUP
     12.32     133.79 us      24.19 us   24796.27 us        3362310    READLINK
     24.78    7366.92 us     172.39 us 3216981.76 us         122762      CREATE
     35.55     511.07 us      56.96 us  765927.63 us        2538760       WRITE

    Duration: 2936613 seconds
   Data Read: 2026789649490 bytes
Data Written: 2001490811195 bytes

Interval 0 Stats:
   Block Size:                  2b+                   4b+                   8b+
 No. of Reads:                    4                     3                     7
No. of Writes:                   52                    16                    19

   Block Size:                 16b+                  32b+                  64b+
 No. of Reads:                   33                    53                   169
No. of Writes:                   49                  7913                 48095

   Block Size:                128b+                 256b+                 512b+
 No. of Reads:                  215                   571                  1019
No. of Writes:                 9528                125591                 63575

   Block Size:               1024b+                2048b+                4096b+
 No. of Reads:                 2026                  3756                  7697
No. of Writes:                11496                293277                 87768

   Block Size:               8192b+               16384b+               32768b+
 No. of Reads:                15833                 35386                 67097
No. of Writes:             10764933               6849111                289233

   Block Size:              65536b+              131072b+              262144b+
 No. of Reads:               129816              15330275                     0
No. of Writes:               239469              12697465                   324

 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         761089      FORGET
      0.00       0.00 us       0.00 us       0.00 us         877250     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00   27055.56 us   27055.56 us   27055.56 us              1     OPENDIR
      0.00   14055.61 us     418.00 us   53534.63 us              4     SYMLINK
      0.00     205.56 us      99.61 us     988.66 us            348        OPEN
      0.00   53888.73 us     272.35 us  107505.10 us              2    READDIRP
      0.01     352.22 us      95.36 us  146156.03 us           1337    SETXATTR
      0.28      82.27 us      14.07 us    5471.66 us         123111       FLUSH
      0.28     122.98 us      36.31 us   10769.50 us          83127       FSTAT
      0.50   13730.50 us     249.06 us 1510813.17 us           1337       MKDIR
      0.81     135.81 us      25.37 us    8437.55 us         216677      STATFS
      1.22     363.33 us     115.19 us  702658.13 us         122751      RENAME
      1.30      96.66 us      15.12 us   18893.15 us         491322     ENTRYLK
      1.96    2094.16 us      42.38 us  359704.68 us          34240        READ
      1.99      98.62 us      14.67 us   16834.50 us         737142     INODELK
      2.49     183.33 us      49.59 us  293925.11 us         496634     SETATTR
      5.51     151.39 us      34.18 us   19410.12 us        1329114        STAT
     10.98     208.37 us      30.23 us  305491.07 us        1924121      LOOKUP
     12.32     133.79 us      24.19 us   24796.27 us        3362310    READLINK
     24.78    7366.92 us     172.39 us 3216981.76 us         122762      CREATE
     35.55     511.07 us      56.96 us  765927.63 us        2538760       WRITE

    Duration: 2936613 seconds
   Data Read: 2026789649490 bytes
Data Written: 2001490811195 bytes

Brick: glusterfs-server-006:/srv/glusterfs
------------------------------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+
 No. of Reads:                    0                     0                    12
No. of Writes:                    2                    59                     8

   Block Size:                  8b+                  16b+                  32b+
 No. of Reads:                   19                    20                    61
No. of Writes:                   16                    52                  7775

   Block Size:                 64b+                 128b+                 256b+
 No. of Reads:                  152                   249                   667
No. of Writes:                46572                  8270                124912

   Block Size:                512b+                1024b+                2048b+
 No. of Reads:                 1029                  1806                  3777
No. of Writes:                62658                 12107                293760

   Block Size:               4096b+                8192b+               16384b+
 No. of Reads:                 7591                 16284                 35374
No. of Writes:                87794              10811902               6825757

   Block Size:              32768b+               65536b+              131072b+
 No. of Reads:                66785                129681              15196967
No. of Writes:               290003                238724              12681970

   Block Size:             262144b+
 No. of Reads:                    0
No. of Writes:                  312
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         759997      FORGET
      0.00       0.00 us       0.00 us       0.00 us         876383     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00   25546.82 us   25546.82 us   25546.82 us              1     OPENDIR
      0.00   19223.13 us     181.54 us   38264.73 us              2    READDIRP
      0.00     212.54 us      98.56 us     725.51 us            343        OPEN
      0.00   41228.94 us   17427.73 us   84573.17 us              3     SYMLINK
      0.01     228.90 us      69.37 us    1174.57 us           1337    SETXATTR
      0.29     125.67 us      30.08 us    6781.36 us          82251       FSTAT
      0.29      85.99 us      14.01 us    5756.84 us         122256       FLUSH
      0.47   12732.09 us     251.34 us  557837.65 us           1337       MKDIR
      0.82     136.64 us      29.19 us    5954.76 us         216678      STATFS
      1.36     403.90 us      99.30 us  960987.11 us         121904      RENAME
      1.38     102.06 us      14.64 us   18850.86 us         487950     ENTRYLK
      1.92    1963.09 us      35.94 us  450094.97 us          35237        READ
      2.10     103.57 us      14.68 us   19286.41 us         732092     INODELK
      5.59     151.77 us      31.52 us   21707.17 us        1329145        STAT
      6.04     138.64 us      30.37 us   56900.52 us        1571940    READLINK
      7.05     515.99 us      45.21 us 80443768.38 us         493241     SETATTR
     11.23     214.75 us      27.75 us  583654.68 us        1885952      LOOKUP
     25.98    7688.85 us     153.38 us 16089338.93 us         121913      CREATE
     35.45     503.91 us      47.07 us  969118.07 us        2538136       WRITE

    Duration: 2936612 seconds
   Data Read: 2009273726518 bytes
Data Written: 1999857803405 bytes

Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+
 No. of Reads:                    0                     0                    12
No. of Writes:                    2                    59                     8

   Block Size:                  8b+                  16b+                  32b+
 No. of Reads:                   19                    20                    61
No. of Writes:                   16                    52                  7775

   Block Size:                 64b+                 128b+                 256b+
 No. of Reads:                  152                   249                   667
No. of Writes:                46572                  8270                124912

   Block Size:                512b+                1024b+                2048b+
 No. of Reads:                 1029                  1806                  3777
No. of Writes:                62658                 12107                293760

   Block Size:               4096b+                8192b+               16384b+
 No. of Reads:                 7591                 16284                 35374
No. of Writes:                87794              10811902               6825757

   Block Size:              32768b+               65536b+              131072b+
 No. of Reads:                66785                129681              15196967
No. of Writes:               290003                238724              12681970

   Block Size:             262144b+
 No. of Reads:                    0
No. of Writes:                  312
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         759997      FORGET
      0.00       0.00 us       0.00 us       0.00 us         876383     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00   25546.82 us   25546.82 us   25546.82 us              1     OPENDIR
      0.00   19223.13 us     181.54 us   38264.73 us              2    READDIRP
      0.00     212.54 us      98.56 us     725.51 us            343        OPEN
      0.00   41228.94 us   17427.73 us   84573.17 us              3     SYMLINK
      0.01     228.90 us      69.37 us    1174.57 us           1337    SETXATTR
      0.29     125.67 us      30.08 us    6781.36 us          82251       FSTAT
      0.29      85.99 us      14.01 us    5756.84 us         122256       FLUSH
      0.47   12732.09 us     251.34 us  557837.65 us           1337       MKDIR
      0.82     136.64 us      29.19 us    5954.76 us         216678      STATFS
      1.36     403.90 us      99.30 us  960987.11 us         121904      RENAME
      1.38     102.06 us      14.64 us   18850.86 us         487950     ENTRYLK
      1.92    1963.09 us      35.94 us  450094.97 us          35237        READ
      2.10     103.57 us      14.68 us   19286.41 us         732092     INODELK
      5.59     151.77 us      31.52 us   21707.17 us        1329145        STAT
      6.04     138.64 us      30.37 us   56900.52 us        1571940    READLINK
      7.05     515.99 us      45.21 us 80443768.38 us         493241     SETATTR
     11.23     214.75 us      27.75 us  583654.68 us        1885952      LOOKUP
     25.98    7688.85 us     153.38 us 16089338.93 us         121913      CREATE
     35.45     503.91 us      47.07 us  969118.07 us        2538136       WRITE

    Duration: 2936612 seconds
   Data Read: 2009273726518 bytes
Data Written: 1999857803405 bytes

Brick: glusterfs-server-004:/srv/glusterfs
------------------------------------------------------
Cumulative Stats:
   Block Size:                  1b+                   2b+                   4b+
 No. of Reads:                    0                     2                     9
No. of Writes:                    3                    47                    11

   Block Size:                  8b+                  16b+                  32b+
 No. of Reads:                   15                    34                    51
No. of Writes:                   24                    39                  7729

   Block Size:                 64b+                 128b+                 256b+
 No. of Reads:                  150                   206                   586
No. of Writes:                49078                  8897                125797

   Block Size:                512b+                1024b+                2048b+
 No. of Reads:                 1017                  2103                  3927
No. of Writes:                62556                 11244                294675

   Block Size:               4096b+                8192b+               16384b+
 No. of Reads:                 7994                 15937                 35538
No. of Writes:                88183              10816399               6833859

   Block Size:              32768b+               65536b+              131072b+
 No. of Reads:                67465                129676              15270559
No. of Writes:               294684                241097              12687722

   Block Size:             262144b+
 No. of Reads:                    0
No. of Writes:                  309
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         759877      FORGET
      0.00       0.00 us       0.00 us       0.00 us         876212     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00   20372.47 us     222.50 us   40522.44 us              2    READDIRP
      0.00     190.68 us     100.72 us     487.51 us            374        OPEN
      0.00   48639.83 us    9423.20 us   87856.46 us              2     SYMLINK
      0.00  108883.61 us  108883.61 us  108883.61 us              1     OPENDIR
      0.01     234.64 us      63.55 us   14273.03 us           1337    SETXATTR
      0.30     122.28 us      35.47 us    5785.74 us          82730       FSTAT
      0.31      82.91 us      14.66 us    7258.28 us         122582       FLUSH
      0.61   15288.20 us     206.38 us  476600.42 us           1337       MKDIR
      0.88     134.62 us      30.75 us    8385.37 us         216677      STATFS
      1.40      95.11 us       9.77 us   18536.12 us         489146     ENTRYLK
      2.15      97.48 us      13.42 us   20998.88 us         733890     INODELK
      2.23    2053.85 us      45.72 us  346922.27 us          36151        READ
      2.26     616.26 us     112.17 us 25253859.69 us         122201      RENAME
      2.75     185.47 us      51.28 us  968572.94 us         494427     SETATTR
      6.20     155.41 us      34.07 us   13948.71 us        1329009        STAT
     11.17     204.32 us      30.59 us  257985.38 us        1819858      LOOKUP
     30.76    8381.50 us     128.57 us 47936543.81 us         122208      CREATE
     38.96     511.20 us      55.63 us 1132665.78 us        2538043       WRITE

    Duration: 2936612 seconds
   Data Read: 2018962698577 bytes
Data Written: 2001437401423 bytes

Interval 0 Stats:
   Block Size:                  1b+                   2b+                   4b+
 No. of Reads:                    0                     2                     9
No. of Writes:                    3                    47                    11

   Block Size:                  8b+                  16b+                  32b+
 No. of Reads:                   15                    34                    51
No. of Writes:                   24                    39                  7729

   Block Size:                 64b+                 128b+                 256b+
 No. of Reads:                  150                   206                   586
No. of Writes:                49078                  8897                125797

   Block Size:                512b+                1024b+                2048b+
 No. of Reads:                 1017                  2103                  3927
No. of Writes:                62556                 11244                294675

   Block Size:               4096b+                8192b+               16384b+
 No. of Reads:                 7994                 15937                 35538
No. of Writes:                88183              10816399               6833859

   Block Size:              32768b+               65536b+              131072b+
 No. of Reads:                67465                129676              15270559
No. of Writes:               294684                241097              12687722

   Block Size:             262144b+
 No. of Reads:                    0
No. of Writes:                  309
 %-latency   Avg-latency   Min-Latency   Max-Latency   No. of calls         Fop
 ---------   -----------   -----------   -----------   ------------        ----
      0.00       0.00 us       0.00 us       0.00 us         759877      FORGET
      0.00       0.00 us       0.00 us       0.00 us         876212     RELEASE
      0.00       0.00 us       0.00 us       0.00 us          16092  RELEASEDIR
      0.00   20372.47 us     222.50 us   40522.44 us              2    READDIRP
      0.00     190.68 us     100.72 us     487.51 us            374        OPEN
      0.00   48639.83 us    9423.20 us   87856.46 us              2     SYMLINK
      0.00  108883.61 us  108883.61 us  108883.61 us              1     OPENDIR
      0.01     234.64 us      63.55 us   14273.03 us           1337    SETXATTR
      0.30     122.28 us      35.47 us    5785.74 us          82730       FSTAT
      0.31      82.91 us      14.66 us    7258.28 us         122582       FLUSH
      0.61   15288.20 us     206.38 us  476600.42 us           1337       MKDIR
      0.88     134.62 us      30.75 us    8385.37 us         216677      STATFS
      1.40      95.11 us       9.77 us   18536.12 us         489146     ENTRYLK
      2.15      97.48 us      13.42 us   20998.88 us         733890     INODELK
      2.23    2053.85 us      45.72 us  346922.27 us          36151        READ
      2.26     616.26 us     112.17 us 25253859.69 us         122201      RENAME
      2.75     185.47 us      51.28 us  968572.94 us         494427     SETATTR
      6.20     155.41 us      34.07 us   13948.71 us        1329009        STAT
     11.17     204.32 us      30.59 us  257985.38 us        1819858      LOOKUP
     30.76    8381.50 us     128.57 us 47936543.81 us         122208      CREATE
     38.96     511.20 us      55.63 us 1132665.78 us        2538043       WRITE

    Duration: 2936612 seconds
   Data Read: 2018962698577 bytes
Data Written: 2001437401423 bytes


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