[Gluster-users] [ovirt-users] Re: Gluster problems, cluster performance issues
Jim Kusznir
jim at palousetech.com
Wed May 30 16:36:42 UTC 2018
Hi all again:
I'm now subscribed to gluster-users as well, so I should get any replies
from that side too.
At this point, I am seeing acceptable (although slower than I expect)
performance much of the time, with periodic massive spikes in latency
(occasionally so bad as to cause ovirt to detect a engine bad health
status). Often, if I check the logs just then, I'll see those call traces
in xfs_log_worker or other gluster processes, as well as hung task timeout
messages.
As to the profile suggesting ovirt1 had poorer performance than ovirt2, I
don't have an explanation. gluster volume info engine on both hosts are
identical. The computers and drives are identical (Dell R610 with PERC 6/i
controller configured to pass through the drive). ovirt1 and ovirt2's
partiion scheme/map do vary somewhat, but I figured that wouldn't be a big
deal and gluster just uses the least common denominator. Is that accurate?
In case it was missed, here are the dmesg errors being thrown by gluster
(as far as I can tell). They definately started after I upgraded from
gluster 3.8 to 3.12:
[ 6604.536156] perf: interrupt took too long (9593 > 9565), lowering
kernel.perf_event_max_sample_rate to 20000
[ 8280.188734] INFO: task xfsaild/dm-10:1061 blocked for more than 120
seconds.
[ 8280.188787] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 8280.188837] xfsaild/dm-10 D ffff93203a2eeeb0 0 1061 2
0x00000000
[ 8280.188843] Call Trace:
[ 8280.188857] [<ffffffff960a3a2e>] ? try_to_del_timer_sync+0x5e/0x90
[ 8280.188864] [<ffffffff96713f79>] schedule+0x29/0x70
[ 8280.188932] [<ffffffffc049fe36>] _xfs_log_force+0x1c6/0x2c0 [xfs]
[ 8280.188939] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20
[ 8280.188972] [<ffffffffc04abfec>] ? xfsaild+0x16c/0x6f0 [xfs]
[ 8280.189003] [<ffffffffc049ff5c>] xfs_log_force+0x2c/0x70 [xfs]
[ 8280.189035] [<ffffffffc04abe80>] ? xfs_trans_ail_cursor_first+0x90/0x90
[xfs]
[ 8280.189067] [<ffffffffc04abfec>] xfsaild+0x16c/0x6f0 [xfs]
[ 8280.189100] [<ffffffffc04abe80>] ? xfs_trans_ail_cursor_first+0x90/0x90
[xfs]
[ 8280.189105] [<ffffffff960bb161>] kthread+0xd1/0xe0
[ 8280.189109] [<ffffffff960bb090>] ? insert_kthread_work+0x40/0x40
[ 8280.189117] [<ffffffff96720677>] ret_from_fork_nospec_begin+0x21/0x21
[ 8280.189121] [<ffffffff960bb090>] ? insert_kthread_work+0x40/0x40
[ 8280.189161] INFO: task glusterclogfsyn:6421 blocked for more than 120
seconds.
[ 8280.189207] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 8280.189256] glusterclogfsyn D ffff93203a2edee0 0 6421 1
0x00000080
[ 8280.189260] Call Trace:
[ 8280.189265] [<ffffffff96713f79>] schedule+0x29/0x70
[ 8280.189300] [<ffffffffc04a0388>] _xfs_log_force_lsn+0x2e8/0x340 [xfs]
[ 8280.189305] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20
[ 8280.189333] [<ffffffffc0480b97>] xfs_file_fsync+0x107/0x1e0 [xfs]
[ 8280.189340] [<ffffffff9624f0e7>] do_fsync+0x67/0xb0
[ 8280.189345] [<ffffffff9672076f>] ? system_call_after_swapgs+0xbc/0x160
[ 8280.189348] [<ffffffff9624f3d0>] SyS_fsync+0x10/0x20
[ 8280.189352] [<ffffffff9672082f>] system_call_fastpath+0x1c/0x21
[ 8280.189356] [<ffffffff9672077b>] ? system_call_after_swapgs+0xc8/0x160
[ 8280.189360] INFO: task glusteriotwr2:766 blocked for more than 120
seconds.
[ 8280.189404] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 8280.189453] glusteriotwr2 D ffff931cfa510000 0 766 1
0x00000080
[ 8280.189457] Call Trace:
[ 8280.189476] [<ffffffffc01a3839>] ? __split_and_process_bio+0x2e9/0x520
[dm_mod]
[ 8280.189480] [<ffffffff96713f79>] schedule+0x29/0x70
[ 8280.189484] [<ffffffff967118e9>] schedule_timeout+0x239/0x2c0
[ 8280.189494] [<ffffffffc01a3d98>] ? dm_make_request+0x128/0x1a0 [dm_mod]
[ 8280.189498] [<ffffffff9671348d>] io_schedule_timeout+0xad/0x130
[ 8280.189502] [<ffffffff967145ad>] wait_for_completion_io+0xfd/0x140
[ 8280.189507] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20
[ 8280.189513] [<ffffffff9631e574>] blkdev_issue_flush+0xb4/0x110
[ 8280.189546] [<ffffffffc04984b9>] xfs_blkdev_issue_flush+0x19/0x20 [xfs]
[ 8280.189588] [<ffffffffc0480c40>] xfs_file_fsync+0x1b0/0x1e0 [xfs]
[ 8280.189593] [<ffffffff9624f0e7>] do_fsync+0x67/0xb0
[ 8280.189597] [<ffffffff9672076f>] ? system_call_after_swapgs+0xbc/0x160
[ 8280.189600] [<ffffffff9624f3d0>] SyS_fsync+0x10/0x20
[ 8280.189604] [<ffffffff9672082f>] system_call_fastpath+0x1c/0x21
[ 8280.189608] [<ffffffff9672077b>] ? system_call_after_swapgs+0xc8/0x160
[ 8400.186024] INFO: task xfsaild/dm-10:1061 blocked for more than 120
seconds.
[ 8400.186077] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 8400.186127] xfsaild/dm-10 D ffff93203a2eeeb0 0 1061 2
0x00000000
[ 8400.186133] Call Trace:
[ 8400.186146] [<ffffffff960a3a2e>] ? try_to_del_timer_sync+0x5e/0x90
[ 8400.186153] [<ffffffff96713f79>] schedule+0x29/0x70
[ 8400.186221] [<ffffffffc049fe36>] _xfs_log_force+0x1c6/0x2c0 [xfs]
[ 8400.186227] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20
[ 8400.186260] [<ffffffffc04abfec>] ? xfsaild+0x16c/0x6f0 [xfs]
[ 8400.186292] [<ffffffffc049ff5c>] xfs_log_force+0x2c/0x70 [xfs]
[ 8400.186324] [<ffffffffc04abe80>] ? xfs_trans_ail_cursor_first+0x90/0x90
[xfs]
[ 8400.186356] [<ffffffffc04abfec>] xfsaild+0x16c/0x6f0 [xfs]
[ 8400.186388] [<ffffffffc04abe80>] ? xfs_trans_ail_cursor_first+0x90/0x90
[xfs]
[ 8400.186394] [<ffffffff960bb161>] kthread+0xd1/0xe0
[ 8400.186398] [<ffffffff960bb090>] ? insert_kthread_work+0x40/0x40
[ 8400.186405] [<ffffffff96720677>] ret_from_fork_nospec_begin+0x21/0x21
[ 8400.186409] [<ffffffff960bb090>] ? insert_kthread_work+0x40/0x40
[ 8400.186450] INFO: task glusterclogfsyn:6421 blocked for more than 120
seconds.
[ 8400.186496] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 8400.186545] glusterclogfsyn D ffff93203a2edee0 0 6421 1
0x00000080
[ 8400.186549] Call Trace:
[ 8400.186554] [<ffffffff96713f79>] schedule+0x29/0x70
[ 8400.186589] [<ffffffffc04a0388>] _xfs_log_force_lsn+0x2e8/0x340 [xfs]
[ 8400.186593] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20
[ 8400.186622] [<ffffffffc0480b97>] xfs_file_fsync+0x107/0x1e0 [xfs]
[ 8400.186629] [<ffffffff9624f0e7>] do_fsync+0x67/0xb0
[ 8400.186634] [<ffffffff9672076f>] ? system_call_after_swapgs+0xbc/0x160
[ 8400.186637] [<ffffffff9624f3d0>] SyS_fsync+0x10/0x20
[ 8400.186641] [<ffffffff9672082f>] system_call_fastpath+0x1c/0x21
[ 8400.186645] [<ffffffff9672077b>] ? system_call_after_swapgs+0xc8/0x160
[ 8400.186649] INFO: task glusteriotwr2:766 blocked for more than 120
seconds.
[ 8400.186693] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 8400.186741] glusteriotwr2 D ffff931cfa510000 0 766 1
0x00000080
[ 8400.186746] Call Trace:
[ 8400.186764] [<ffffffffc01a3839>] ? __split_and_process_bio+0x2e9/0x520
[dm_mod]
[ 8400.186768] [<ffffffff96713f79>] schedule+0x29/0x70
[ 8400.186772] [<ffffffff967118e9>] schedule_timeout+0x239/0x2c0
[ 8400.186782] [<ffffffffc01a3d98>] ? dm_make_request+0x128/0x1a0 [dm_mod]
[ 8400.186786] [<ffffffff9671348d>] io_schedule_timeout+0xad/0x130
[ 8400.186790] [<ffffffff967145ad>] wait_for_completion_io+0xfd/0x140
[ 8400.186795] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20
[ 8400.186800] [<ffffffff9631e574>] blkdev_issue_flush+0xb4/0x110
[ 8400.186833] [<ffffffffc04984b9>] xfs_blkdev_issue_flush+0x19/0x20 [xfs]
[ 8400.186862] [<ffffffffc0480c40>] xfs_file_fsync+0x1b0/0x1e0 [xfs]
[ 8400.186879] [<ffffffff9624f0e7>] do_fsync+0x67/0xb0
[ 8400.186884] [<ffffffff9672076f>] ? system_call_after_swapgs+0xbc/0x160
[ 8400.186887] [<ffffffff9624f3d0>] SyS_fsync+0x10/0x20
[ 8400.186891] [<ffffffff9672082f>] system_call_fastpath+0x1c/0x21
[ 8400.186895] [<ffffffff9672077b>] ? system_call_after_swapgs+0xc8/0x160
[ 8400.186912] INFO: task kworker/3:4:3191 blocked for more than 120
seconds.
[ 8400.186957] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 8400.187006] kworker/3:4 D ffff931faf598fd0 0 3191 2
0x00000080
[ 8400.187041] Workqueue: xfs-sync/dm-10 xfs_log_worker [xfs]
[ 8400.187043] Call Trace:
[ 8400.187050] [<ffffffff9614e45f>] ? delayacct_end+0x8f/0xb0
[ 8400.187055] [<ffffffff960dbbc8>] ? update_group_power+0x28/0x280
[ 8400.187059] [<ffffffff96713f79>] schedule+0x29/0x70
[ 8400.187062] [<ffffffff967118e9>] schedule_timeout+0x239/0x2c0
[ 8400.187066] [<ffffffff9671432d>] wait_for_completion+0xfd/0x140
[ 8400.187071] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20
[ 8400.187075] [<ffffffff960b418d>] flush_work+0xfd/0x190
[ 8400.187079] [<ffffffff960b06e0>] ? move_linked_works+0x90/0x90
[ 8400.187110] [<ffffffffc04a1d8a>] xlog_cil_force_lsn+0x8a/0x210 [xfs]
[ 8400.187142] [<ffffffffc049fcf5>] _xfs_log_force+0x85/0x2c0 [xfs]
[ 8400.187174] [<ffffffffc049ffd6>] ? xfs_log_worker+0x36/0x100 [xfs]
[ 8400.187206] [<ffffffffc049ff5c>] xfs_log_force+0x2c/0x70 [xfs]
[ 8400.187237] [<ffffffffc049ffd6>] xfs_log_worker+0x36/0x100 [xfs]
[ 8400.187241] [<ffffffff960b312f>] process_one_work+0x17f/0x440
[ 8400.187245] [<ffffffff960b3df6>] worker_thread+0x126/0x3c0
[ 8400.187249] [<ffffffff960b3cd0>] ? manage_workers.isra.24+0x2a0/0x2a0
[ 8400.187253] [<ffffffff960bb161>] kthread+0xd1/0xe0
[ 8400.187257] [<ffffffff960bb090>] ? insert_kthread_work+0x40/0x40
[ 8400.187261] [<ffffffff96720677>] ret_from_fork_nospec_begin+0x21/0x21
[ 8400.187265] [<ffffffff960bb090>] ? insert_kthread_work+0x40/0x40
[13493.643624] perf: interrupt took too long (12026 > 11991), lowering
kernel.perf_event_max_sample_rate to 16000
On Wed, May 30, 2018 at 2:44 AM, Krutika Dhananjay <kdhananj at redhat.com>
wrote:
> The profile seems to suggest very high latencies on the brick at
> ovirt1.nwfiber.com:/gluster/brick1/engine
> ovirt2.* shows decent numbers. Is everything OK with the brick on ovirt1?
> Are the bricks of engine volume on both these servers identical in terms
> of their config?
>
> -Krutika
>
>
> On Wed, May 30, 2018 at 3:07 PM, Jim Kusznir <jim at palousetech.com> wrote:
>
>> Hi:
>>
>> Thank you. I was finally able to get my cluster minimally functional
>> again (its 2am local here; had to be up by 6am). I set the
>> cluster.eager-lock off, but I'm still seeing performance issues. Here's
>> the engine volume:
>>
>> Brick: ovirt1.nwfiber.com:/gluster/brick1/engine
>> ------------------------------------------------
>> Cumulative Stats:
>> Block Size: 256b+ 512b+
>> 4096b+
>> No. of Reads: 702 24
>> 772
>> No. of Writes: 0 939
>> 4802
>>
>> Block Size: 8192b+ 16384b+
>> 32768b+
>> No. of Reads: 0 51
>> 49
>> No. of Writes: 4211 858
>> 291
>>
>> Block Size: 65536b+ 131072b+
>> No. of Reads: 49 5232
>> No. of Writes: 333 588
>> %-latency Avg-latency Min-Latency Max-Latency No. of calls
>> Fop
>> --------- ----------- ----------- ----------- ------------
>> ----
>> 0.00 0.00 us 0.00 us 0.00 us 3
>> FORGET
>> 0.00 0.00 us 0.00 us 0.00 us 1227
>> RELEASE
>> 0.00 0.00 us 0.00 us 0.00 us 1035
>> RELEASEDIR
>> 0.00 827.00 us 619.00 us 1199.00 us 10
>> READDIRP
>> 0.00 98.38 us 30.00 us 535.00 us 144
>> ENTRYLK
>> 0.00 180.11 us 121.00 us 257.00 us 94
>> REMOVEXATTR
>> 0.00 208.03 us 23.00 us 1980.00 us 182
>> GETXATTR
>> 0.00 1212.71 us 35.00 us 29459.00 us 38
>> READDIR
>> 0.01 260.39 us 172.00 us 552.00 us 376
>> XATTROP
>> 0.01 305.10 us 45.00 us 144983.00 us 727
>> STATFS
>> 0.03 1267.23 us 22.00 us 418399.00 us 451
>> FLUSH
>> 0.04 1164.14 us 86.00 us 437638.00 us 600
>> OPEN
>> 0.07 2253.75 us 3.00 us 645037.00 us 598
>> OPENDIR
>> 0.08 17360.97 us 149.00 us 962156.00 us 94
>> SETATTR
>> 0.12 2733.36 us 50.00 us 1683945.00 us 877
>> FSTAT
>> 0.21 3041.55 us 29.00 us 1021732.00 us 1368
>> INODELK
>> 0.24 389.93 us 107.00 us 550203.00 us 11840
>> FXATTROP
>> 0.34 14820.49 us 38.00 us 1935527.00 us 444
>> STAT
>> 0.88 3765.77 us 42.00 us 1341978.00 us 4581
>> LOOKUP
>> 15.06 19624.04 us 26.00 us 6412511.00 us 14971
>> FINODELK
>> 21.63 59817.26 us 45.00 us 4008832.00 us 7054
>> FSYNC
>> 23.19 263941.14 us 86.00 us 4130892.00 us 1714
>> READ
>> 38.10 125578.64 us 207.00 us 7682338.00 us 5919
>> WRITE
>>
>> Duration: 6957 seconds
>> Data Read: 694832857 bytes
>> Data Written: 192751104 bytes
>>
>> Interval 0 Stats:
>> Block Size: 256b+ 512b+
>> 4096b+
>> No. of Reads: 702 24
>> 772
>> No. of Writes: 0 939
>> 4802
>>
>> Block Size: 8192b+ 16384b+
>> 32768b+
>> No. of Reads: 0 51
>> 49
>> No. of Writes: 4211 858
>> 291
>>
>> Block Size: 65536b+ 131072b+
>> No. of Reads: 49 5232
>> No. of Writes: 333 588
>> %-latency Avg-latency Min-Latency Max-Latency No. of calls
>> Fop
>> --------- ----------- ----------- ----------- ------------
>> ----
>> 0.00 0.00 us 0.00 us 0.00 us 3
>> FORGET
>> 0.00 0.00 us 0.00 us 0.00 us 1227
>> RELEASE
>> 0.00 0.00 us 0.00 us 0.00 us 1035
>> RELEASEDIR
>> 0.00 827.00 us 619.00 us 1199.00 us 10
>> READDIRP
>> 0.00 98.38 us 30.00 us 535.00 us 144
>> ENTRYLK
>> 0.00 180.11 us 121.00 us 257.00 us 94
>> REMOVEXATTR
>> 0.00 208.03 us 23.00 us 1980.00 us 182
>> GETXATTR
>> 0.00 1212.71 us 35.00 us 29459.00 us 38
>> READDIR
>> 0.01 260.39 us 172.00 us 552.00 us 376
>> XATTROP
>> 0.01 305.10 us 45.00 us 144983.00 us 727
>> STATFS
>> 0.03 1267.23 us 22.00 us 418399.00 us 451
>> FLUSH
>> 0.04 1164.14 us 86.00 us 437638.00 us 600
>> OPEN
>> 0.07 2253.75 us 3.00 us 645037.00 us 598
>> OPENDIR
>> 0.08 17360.97 us 149.00 us 962156.00 us 94
>> SETATTR
>> 0.12 2733.36 us 50.00 us 1683945.00 us 877
>> FSTAT
>> 0.21 3041.55 us 29.00 us 1021732.00 us 1368
>> INODELK
>> 0.24 389.93 us 107.00 us 550203.00 us 11840
>> FXATTROP
>> 0.34 14820.49 us 38.00 us 1935527.00 us 444
>> STAT
>> 0.91 3859.75 us 42.00 us 1341978.00 us 4581
>> LOOKUP
>> 15.05 19622.80 us 26.00 us 6412511.00 us 14971
>> FINODELK
>> 21.62 59809.04 us 45.00 us 4008832.00 us 7054
>> FSYNC
>> 23.18 263941.14 us 86.00 us 4130892.00 us 1714
>> READ
>> 38.09 125562.74 us 207.00 us 7682338.00 us 5919
>> WRITE
>>
>> Duration: 6957 seconds
>> Data Read: 694832857 bytes
>> Data Written: 192751104 bytes
>>
>> Brick: ovirt2.nwfiber.com:/gluster/brick1/engine
>> ------------------------------------------------
>> Cumulative Stats:
>> Block Size: 256b+ 512b+
>> 1024b+
>> No. of Reads: 704 167
>> 216
>> No. of Writes: 0 939
>> 0
>>
>> Block Size: 2048b+ 4096b+
>> 8192b+
>> No. of Reads: 424 34918
>> 9866
>> No. of Writes: 0 4802
>> 4211
>>
>> Block Size: 16384b+ 32768b+
>> 65536b+
>> No. of Reads: 12695 3290
>> 3880
>> No. of Writes: 858 291
>> 333
>>
>> Block Size: 131072b+
>> No. of Reads: 13718
>> No. of Writes: 596
>> %-latency Avg-latency Min-Latency Max-Latency No. of calls
>> Fop
>> --------- ----------- ----------- ----------- ------------
>> ----
>> 0.00 0.00 us 0.00 us 0.00 us 3
>> FORGET
>> 0.00 0.00 us 0.00 us 0.00 us 1228
>> RELEASE
>> 0.00 0.00 us 0.00 us 0.00 us 1041
>> RELEASEDIR
>> 0.06 74.26 us 21.00 us 915.00 us 144
>> ENTRYLK
>> 0.07 141.97 us 87.00 us 268.00 us 94
>> REMOVEXATTR
>> 0.08 370.68 us 22.00 us 1311.00 us 38
>> READDIR
>> 0.09 184.88 us 108.00 us 316.00 us 94
>> SETATTR
>> 0.14 56.41 us 21.00 us 540.00 us 451
>> FLUSH
>> 0.14 139.42 us 18.00 us 3251.00 us 184
>> GETXATTR
>> 0.31 96.06 us 2.00 us 2293.00 us 598
>> OPENDIR
>> 0.35 88.76 us 31.00 us 716.00 us 727
>> STATFS
>> 0.43 131.96 us 59.00 us 784.00 us 600
>> OPEN
>> 0.44 214.77 us 110.00 us 851.00 us 376
>> XATTROP
>> 0.44 81.02 us 21.00 us 3029.00 us 998
>> STAT
>> 0.51 68.57 us 17.00 us 3039.00 us 1368
>> INODELK
>> 1.26 429.06 us 274.00 us 988.00 us 539
>> READDIRP
>> 1.89 109.48 us 38.00 us 2492.00 us 3175
>> FSTAT
>> 5.09 62.48 us 19.00 us 4578.00 us 14967
>> FINODELK
>> 5.72 229.43 us 32.00 us 979.00 us 4581
>> LOOKUP
>> 11.48 356.40 us 144.00 us 16222.00 us 5917
>> WRITE
>> 12.40 192.55 us 87.00 us 4372.00 us 11834
>> FXATTROP
>> 12.48 325.11 us 33.00 us 10702.00 us 7051
>> FSYNC
>> 46.61 2063.11 us 131.00 us 193833.00 us 4151
>> READ
>>
>> Duration: 6958 seconds
>> Data Read: 2782908225 bytes
>> Data Written: 193799680 bytes
>>
>> Interval 0 Stats:
>> Block Size: 256b+ 512b+
>> 1024b+
>> No. of Reads: 704 167
>> 216
>> No. of Writes: 0 939
>> 0
>>
>> Block Size: 2048b+ 4096b+
>> 8192b+
>> No. of Reads: 424 34918
>> 9866
>> No. of Writes: 0 4802
>> 4211
>>
>> Block Size: 16384b+ 32768b+
>> 65536b+
>> No. of Reads: 12695 3290
>> 3880
>> No. of Writes: 858 291
>> 333
>>
>> Block Size: 131072b+
>> No. of Reads: 13718
>> No. of Writes: 596
>> %-latency Avg-latency Min-Latency Max-Latency No. of calls
>> Fop
>> --------- ----------- ----------- ----------- ------------
>> ----
>> 0.00 0.00 us 0.00 us 0.00 us 3
>> FORGET
>> 0.00 0.00 us 0.00 us 0.00 us 1228
>> RELEASE
>> 0.00 0.00 us 0.00 us 0.00 us 1041
>> RELEASEDIR
>> 0.06 74.26 us 21.00 us 915.00 us 144
>> ENTRYLK
>> 0.07 141.97 us 87.00 us 268.00 us 94
>> REMOVEXATTR
>> 0.08 370.68 us 22.00 us 1311.00 us 38
>> READDIR
>> 0.09 184.88 us 108.00 us 316.00 us 94
>> SETATTR
>> 0.14 56.41 us 21.00 us 540.00 us 451
>> FLUSH
>> 0.14 139.42 us 18.00 us 3251.00 us 184
>> GETXATTR
>> 0.31 96.06 us 2.00 us 2293.00 us 598
>> OPENDIR
>> 0.35 88.76 us 31.00 us 716.00 us 727
>> STATFS
>> 0.43 131.96 us 59.00 us 784.00 us 600
>> OPEN
>> 0.44 214.77 us 110.00 us 851.00 us 376
>> XATTROP
>> 0.44 81.02 us 21.00 us 3029.00 us 998
>> STAT
>> 0.51 68.57 us 17.00 us 3039.00 us 1368
>> INODELK
>> 1.26 429.06 us 274.00 us 988.00 us 539
>> READDIRP
>> 1.89 109.51 us 38.00 us 2492.00 us 3175
>> FSTAT
>> 5.09 62.48 us 19.00 us 4578.00 us 14967
>> FINODELK
>> 5.72 229.43 us 32.00 us 979.00 us 4581
>> LOOKUP
>> 11.48 356.40 us 144.00 us 16222.00 us 5917
>> WRITE
>> 12.40 192.55 us 87.00 us 4372.00 us 11834
>> FXATTROP
>> 12.48 325.11 us 33.00 us 10702.00 us 7051
>> FSYNC
>> 46.62 2063.91 us 131.00 us 193833.00 us 4151
>> READ
>>
>> Duration: 6958 seconds
>> Data Read: 2782908225 bytes
>> Data Written: 193799680 bytes
>>
>>
>>
>> gluster> volume info engine
>>
>> Volume Name: engine
>> Type: Replicate
>> Volume ID: 87ad86b9-d88b-457e-ba21-5d3173c612de
>> Status: Started
>> Snapshot Count: 0
>> Number of Bricks: 1 x (2 + 1) = 3
>> Transport-type: tcp
>> Bricks:
>> Brick1: ovirt1.nwfiber.com:/gluster/brick1/engine
>> Brick2: ovirt2.nwfiber.com:/gluster/brick1/engine
>> Brick3: ovirt3.nwfiber.com:/gluster/brick1/engine (arbiter)
>> Options Reconfigured:
>> diagnostics.count-fop-hits: on
>> diagnostics.latency-measurement: on
>> performance.strict-o-direct: on
>> nfs.disable: on
>> user.cifs: off
>> network.ping-timeout: 30
>> cluster.shd-max-threads: 6
>> cluster.shd-wait-qlength: 10000
>> cluster.locking-scheme: granular
>> cluster.data-self-heal-algorithm: full
>> performance.low-prio-threads: 32
>> features.shard-block-size: 512MB
>> features.shard: on
>> storage.owner-gid: 36
>> storage.owner-uid: 36
>> cluster.server-quorum-type: server
>> cluster.quorum-type: auto
>> network.remote-dio: off
>> cluster.eager-lock: off
>> performance.stat-prefetch: off
>> performance.io-cache: off
>> performance.read-ahead: off
>> performance.quick-read: off
>> performance.readdir-ahead: on
>> geo-replication.indexing: on
>> geo-replication.ignore-pid-check: on
>> changelog.changelog: on
>>
>>
>> On Tue, May 29, 2018 at 9:17 PM, Krutika Dhananjay <kdhananj at redhat.com>
>> wrote:
>>
>>> Adding Ravi to look into the heal issue.
>>>
>>> As for the fsync hang and subsequent IO errors, it seems a lot like
>>> https://bugzilla.redhat.com/show_bug.cgi?id=1497156 and Paolo Bonzini
>>> from qemu had pointed out that this would be fixed by the following commit:
>>>
>>> commit e72c9a2a67a6400c8ef3d01d4c461dbbbfa0e1f0
>>> Author: Paolo Bonzini <pbonzini at redhat.com>
>>> Date: Wed Jun 21 16:35:46 2017 +0200
>>>
>>> scsi: virtio_scsi: let host do exception handling
>>>
>>> virtio_scsi tries to do exception handling after the default 30 seconds
>>> timeout expires. However, it's better to let the host control the
>>> timeout, otherwise with a heavy I/O load it is likely that an abort will
>>> also timeout. This leads to fatal errors like filesystems going
>>> offline.
>>>
>>> Disable the 'sd' timeout and allow the host to do exception handling,
>>> following the precedent of the storvsc driver.
>>>
>>> Hannes has a proposal to introduce timeouts in virtio, but this provides
>>> an immediate solution for stable kernels too.
>>>
>>> [mkp: fixed typo]
>>>
>>> Reported-by: Douglas Miller <dougmill at linux.vnet.ibm.com>
>>> Cc: "James E.J. Bottomley" <jejb at linux.vnet.ibm.com>
>>> Cc: "Martin K. Petersen" <martin.petersen at oracle.com>
>>> Cc: Hannes Reinecke <hare at suse.de>
>>> Cc: linux-scsi at vger.kernel.org
>>> Cc: stable at vger.kernel.org
>>> Signed-off-by: Paolo Bonzini <pbonzini at redhat.com>
>>> Signed-off-by: Martin K. Petersen <martin.petersen at oracle.com>
>>>
>>>
>>> Adding Paolo/Kevin to comment.
>>>
>>> As for the poor gluster performance, could you disable
>>> cluster.eager-lock and see if that makes any difference:
>>>
>>> # gluster volume set <VOL> cluster.eager-lock off
>>>
>>> Do also capture the volume profile again if you still see performance
>>> issues after disabling eager-lock.
>>>
>>> -Krutika
>>>
>>>
>>> On Wed, May 30, 2018 at 6:55 AM, Jim Kusznir <jim at palousetech.com>
>>> wrote:
>>>
>>>> I also finally found the following in my system log on one server:
>>>>
>>>> [10679.524491] INFO: task glusterclogro:14933 blocked for more than 120
>>>> seconds.
>>>> [10679.525826] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
>>>> disables this message.
>>>> [10679.527144] glusterclogro D ffff97209832bf40 0 14933 1
>>>> 0x00000080
>>>> [10679.527150] Call Trace:
>>>> [10679.527161] [<ffffffffb9913f79>] schedule+0x29/0x70
>>>> [10679.527218] [<ffffffffc060e388>] _xfs_log_force_lsn+0x2e8/0x340
>>>> [xfs]
>>>> [10679.527225] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20
>>>> [10679.527254] [<ffffffffc05eeb97>] xfs_file_fsync+0x107/0x1e0 [xfs]
>>>> [10679.527260] [<ffffffffb944f0e7>] do_fsync+0x67/0xb0
>>>> [10679.527268] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/
>>>> 0x160
>>>> [10679.527271] [<ffffffffb944f3d0>] SyS_fsync+0x10/0x20
>>>> [10679.527275] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21
>>>> [10679.527279] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/
>>>> 0x160
>>>> [10679.527283] INFO: task glusterposixfsy:14941 blocked for more than
>>>> 120 seconds.
>>>> [10679.528608] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
>>>> disables this message.
>>>> [10679.529956] glusterposixfsy D ffff972495f84f10 0 14941 1
>>>> 0x00000080
>>>> [10679.529961] Call Trace:
>>>> [10679.529966] [<ffffffffb9913f79>] schedule+0x29/0x70
>>>> [10679.530003] [<ffffffffc060e388>] _xfs_log_force_lsn+0x2e8/0x340
>>>> [xfs]
>>>> [10679.530008] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20
>>>> [10679.530038] [<ffffffffc05eeb97>] xfs_file_fsync+0x107/0x1e0 [xfs]
>>>> [10679.530042] [<ffffffffb944f0e7>] do_fsync+0x67/0xb0
>>>> [10679.530046] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/
>>>> 0x160
>>>> [10679.530050] [<ffffffffb944f3f3>] SyS_fdatasync+0x13/0x20
>>>> [10679.530054] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21
>>>> [10679.530058] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/
>>>> 0x160
>>>> [10679.530062] INFO: task glusteriotwr13:15486 blocked for more than
>>>> 120 seconds.
>>>> [10679.531805] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
>>>> disables this message.
>>>> [10679.533732] glusteriotwr13 D ffff9720a83f0000 0 15486 1
>>>> 0x00000080
>>>> [10679.533738] Call Trace:
>>>> [10679.533747] [<ffffffffb9913f79>] schedule+0x29/0x70
>>>> [10679.533799] [<ffffffffc060e388>] _xfs_log_force_lsn+0x2e8/0x340
>>>> [xfs]
>>>> [10679.533806] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20
>>>> [10679.533846] [<ffffffffc05eeb97>] xfs_file_fsync+0x107/0x1e0 [xfs]
>>>> [10679.533852] [<ffffffffb944f0e7>] do_fsync+0x67/0xb0
>>>> [10679.533858] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/
>>>> 0x160
>>>> [10679.533863] [<ffffffffb944f3f3>] SyS_fdatasync+0x13/0x20
>>>> [10679.533868] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21
>>>> [10679.533873] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/
>>>> 0x160
>>>> [10919.512757] INFO: task glusterclogro:14933 blocked for more than 120
>>>> seconds.
>>>> [10919.514714] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
>>>> disables this message.
>>>> [10919.516663] glusterclogro D ffff97209832bf40 0 14933 1
>>>> 0x00000080
>>>> [10919.516677] Call Trace:
>>>> [10919.516690] [<ffffffffb9913f79>] schedule+0x29/0x70
>>>> [10919.516696] [<ffffffffb99118e9>] schedule_timeout+0x239/0x2c0
>>>> [10919.516703] [<ffffffffb951cc04>] ? blk_finish_plug+0x14/0x40
>>>> [10919.516768] [<ffffffffc05e9224>] ? _xfs_buf_ioapply+0x334/0x460
>>>> [xfs]
>>>> [10919.516774] [<ffffffffb991432d>] wait_for_completion+0xfd/0x140
>>>> [10919.516782] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20
>>>> [10919.516821] [<ffffffffc05eb0a3>] ? _xfs_buf_read+0x23/0x40 [xfs]
>>>> [10919.516859] [<ffffffffc05eafa9>] xfs_buf_submit_wait+0xf9/0x1d0
>>>> [xfs]
>>>> [10919.516902] [<ffffffffc061b279>] ? xfs_trans_read_buf_map+0x199/0x400
>>>> [xfs]
>>>> [10919.516940] [<ffffffffc05eb0a3>] _xfs_buf_read+0x23/0x40 [xfs]
>>>> [10919.516977] [<ffffffffc05eb1b9>] xfs_buf_read_map+0xf9/0x160 [xfs]
>>>> [10919.517022] [<ffffffffc061b279>] xfs_trans_read_buf_map+0x199/0x400
>>>> [xfs]
>>>> [10919.517057] [<ffffffffc05c8d04>] xfs_da_read_buf+0xd4/0x100 [xfs]
>>>> [10919.517091] [<ffffffffc05c8d53>] xfs_da3_node_read+0x23/0xd0 [xfs]
>>>> [10919.517126] [<ffffffffc05c9fee>] xfs_da3_node_lookup_int+0x6e/0x2f0
>>>> [xfs]
>>>> [10919.517160] [<ffffffffc05d5a1d>] xfs_dir2_node_lookup+0x4d/0x170
>>>> [xfs]
>>>> [10919.517194] [<ffffffffc05ccf5d>] xfs_dir_lookup+0x1bd/0x1e0 [xfs]
>>>> [10919.517233] [<ffffffffc05fd8d9>] xfs_lookup+0x69/0x140 [xfs]
>>>> [10919.517271] [<ffffffffc05fa018>] xfs_vn_lookup+0x78/0xc0 [xfs]
>>>> [10919.517278] [<ffffffffb9425cf3>] lookup_real+0x23/0x60
>>>> [10919.517283] [<ffffffffb9426702>] __lookup_hash+0x42/0x60
>>>> [10919.517288] [<ffffffffb942d519>] SYSC_renameat2+0x3a9/0x5a0
>>>> [10919.517296] [<ffffffffb94d3753>] ? selinux_file_free_security+0x2
>>>> 3/0x30
>>>> [10919.517304] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/
>>>> 0x160
>>>> [10919.517309] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/
>>>> 0x160
>>>> [10919.517313] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/
>>>> 0x160
>>>> [10919.517318] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/
>>>> 0x160
>>>> [10919.517323] [<ffffffffb942e58e>] SyS_renameat2+0xe/0x10
>>>> [10919.517328] [<ffffffffb942e5ce>] SyS_rename+0x1e/0x20
>>>> [10919.517333] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21
>>>> [10919.517339] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/
>>>> 0x160
>>>> [11159.496095] INFO: task glusteriotwr9:15482 blocked for more than 120
>>>> seconds.
>>>> [11159.497546] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
>>>> disables this message.
>>>> [11159.498978] glusteriotwr9 D ffff971fa0fa1fa0 0 15482 1
>>>> 0x00000080
>>>> [11159.498984] Call Trace:
>>>> [11159.498995] [<ffffffffb9911f00>] ? bit_wait+0x50/0x50
>>>> [11159.498999] [<ffffffffb9913f79>] schedule+0x29/0x70
>>>> [11159.499003] [<ffffffffb99118e9>] schedule_timeout+0x239/0x2c0
>>>> [11159.499056] [<ffffffffc05dd9b7>] ? xfs_iext_bno_to_ext+0xa7/0x1a0
>>>> [xfs]
>>>> [11159.499082] [<ffffffffc05dd43e>] ? xfs_iext_bno_to_irec+0x8e/0xd0
>>>> [xfs]
>>>> [11159.499090] [<ffffffffb92f7a12>] ? ktime_get_ts64+0x52/0xf0
>>>> [11159.499093] [<ffffffffb9911f00>] ? bit_wait+0x50/0x50
>>>> [11159.499097] [<ffffffffb991348d>] io_schedule_timeout+0xad/0x130
>>>> [11159.499101] [<ffffffffb9913528>] io_schedule+0x18/0x20
>>>> [11159.499104] [<ffffffffb9911f11>] bit_wait_io+0x11/0x50
>>>> [11159.499107] [<ffffffffb9911ac1>] __wait_on_bit_lock+0x61/0xc0
>>>> [11159.499113] [<ffffffffb9393634>] __lock_page+0x74/0x90
>>>> [11159.499118] [<ffffffffb92bc210>] ? wake_bit_function+0x40/0x40
>>>> [11159.499121] [<ffffffffb9394154>] __find_lock_page+0x54/0x70
>>>> [11159.499125] [<ffffffffb9394e85>] grab_cache_page_write_begin+0x
>>>> 55/0xc0
>>>> [11159.499130] [<ffffffffb9484b76>] iomap_write_begin+0x66/0x100
>>>> [11159.499135] [<ffffffffb9484edf>] iomap_write_actor+0xcf/0x1d0
>>>> [11159.499140] [<ffffffffb9484e10>] ? iomap_write_end+0x80/0x80
>>>> [11159.499144] [<ffffffffb94854e7>] iomap_apply+0xb7/0x150
>>>> [11159.499149] [<ffffffffb9485621>] iomap_file_buffered_write+0xa1
>>>> /0xe0
>>>> [11159.499153] [<ffffffffb9484e10>] ? iomap_write_end+0x80/0x80
>>>> [11159.499182] [<ffffffffc05f025d>] xfs_file_buffered_aio_write+0x12d/0x2c0
>>>> [xfs]
>>>> [11159.499213] [<ffffffffc05f057d>] xfs_file_aio_write+0x18d/0x1b0
>>>> [xfs]
>>>> [11159.499217] [<ffffffffb941a533>] do_sync_write+0x93/0xe0
>>>> [11159.499222] [<ffffffffb941b010>] vfs_write+0xc0/0x1f0
>>>> [11159.499225] [<ffffffffb941c002>] SyS_pwrite64+0x92/0xc0
>>>> [11159.499230] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/
>>>> 0x160
>>>> [11159.499234] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21
>>>> [11159.499238] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/
>>>> 0x160
>>>> [11279.488720] INFO: task xfsaild/dm-10:1134 blocked for more than 120
>>>> seconds.
>>>> [11279.490197] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
>>>> disables this message.
>>>> [11279.491665] xfsaild/dm-10 D ffff9720a8660fd0 0 1134 2
>>>> 0x00000000
>>>> [11279.491671] Call Trace:
>>>> [11279.491682] [<ffffffffb92a3a2e>] ? try_to_del_timer_sync+0x5e/0x90
>>>> [11279.491688] [<ffffffffb9913f79>] schedule+0x29/0x70
>>>> [11279.491744] [<ffffffffc060de36>] _xfs_log_force+0x1c6/0x2c0 [xfs]
>>>> [11279.491750] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20
>>>> [11279.491783] [<ffffffffc0619fec>] ? xfsaild+0x16c/0x6f0 [xfs]
>>>> [11279.491817] [<ffffffffc060df5c>] xfs_log_force+0x2c/0x70 [xfs]
>>>> [11279.491849] [<ffffffffc0619e80>] ? xfs_trans_ail_cursor_first+0x90/0x90
>>>> [xfs]
>>>> [11279.491880] [<ffffffffc0619fec>] xfsaild+0x16c/0x6f0 [xfs]
>>>> [11279.491913] [<ffffffffc0619e80>] ? xfs_trans_ail_cursor_first+0x90/0x90
>>>> [xfs]
>>>> [11279.491919] [<ffffffffb92bb161>] kthread+0xd1/0xe0
>>>> [11279.491926] [<ffffffffb92bb090>] ? insert_kthread_work+0x40/0x40
>>>> [11279.491932] [<ffffffffb9920677>] ret_from_fork_nospec_begin+0x2
>>>> 1/0x21
>>>> [11279.491936] [<ffffffffb92bb090>] ? insert_kthread_work+0x40/0x40
>>>> [11279.491976] INFO: task glusterclogfsyn:14934 blocked for more than
>>>> 120 seconds.
>>>> [11279.493466] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
>>>> disables this message.
>>>> [11279.494952] glusterclogfsyn D ffff97209832af70 0 14934 1
>>>> 0x00000080
>>>> [11279.494957] Call Trace:
>>>> [11279.494979] [<ffffffffc0309839>] ? __split_and_process_bio+0x2e9/0x520
>>>> [dm_mod]
>>>> [11279.494983] [<ffffffffb9913f79>] schedule+0x29/0x70
>>>> [11279.494987] [<ffffffffb99118e9>] schedule_timeout+0x239/0x2c0
>>>> [11279.494997] [<ffffffffc0309d98>] ? dm_make_request+0x128/0x1a0
>>>> [dm_mod]
>>>> [11279.495001] [<ffffffffb991348d>] io_schedule_timeout+0xad/0x130
>>>> [11279.495005] [<ffffffffb99145ad>] wait_for_completion_io+0xfd/0x140
>>>> [11279.495010] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20
>>>> [11279.495016] [<ffffffffb951e574>] blkdev_issue_flush+0xb4/0x110
>>>> [11279.495049] [<ffffffffc06064b9>] xfs_blkdev_issue_flush+0x19/0x20
>>>> [xfs]
>>>> [11279.495079] [<ffffffffc05eec40>] xfs_file_fsync+0x1b0/0x1e0 [xfs]
>>>> [11279.495086] [<ffffffffb944f0e7>] do_fsync+0x67/0xb0
>>>> [11279.495090] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/
>>>> 0x160
>>>> [11279.495094] [<ffffffffb944f3d0>] SyS_fsync+0x10/0x20
>>>> [11279.495098] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21
>>>> [11279.495102] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/
>>>> 0x160
>>>> [11279.495105] INFO: task glusterposixfsy:14941 blocked for more than
>>>> 120 seconds.
>>>> [11279.496606] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
>>>> disables this message.
>>>> [11279.498114] glusterposixfsy D ffff972495f84f10 0 14941 1
>>>> 0x00000080
>>>> [11279.498118] Call Trace:
>>>> [11279.498134] [<ffffffffc0309839>] ? __split_and_process_bio+0x2e9/0x520
>>>> [dm_mod]
>>>> [11279.498138] [<ffffffffb9913f79>] schedule+0x29/0x70
>>>> [11279.498142] [<ffffffffb99118e9>] schedule_timeout+0x239/0x2c0
>>>> [11279.498152] [<ffffffffc0309d98>] ? dm_make_request+0x128/0x1a0
>>>> [dm_mod]
>>>> [11279.498156] [<ffffffffb991348d>] io_schedule_timeout+0xad/0x130
>>>> [11279.498160] [<ffffffffb99145ad>] wait_for_completion_io+0xfd/0x140
>>>> [11279.498165] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20
>>>> [11279.498169] [<ffffffffb951e574>] blkdev_issue_flush+0xb4/0x110
>>>> [11279.498202] [<ffffffffc06064b9>] xfs_blkdev_issue_flush+0x19/0x20
>>>> [xfs]
>>>> [11279.498231] [<ffffffffc05eec40>] xfs_file_fsync+0x1b0/0x1e0 [xfs]
>>>> [11279.498238] [<ffffffffb944f0e7>] do_fsync+0x67/0xb0
>>>> [11279.498242] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/
>>>> 0x160
>>>> [11279.498246] [<ffffffffb944f3f3>] SyS_fdatasync+0x13/0x20
>>>> [11279.498250] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21
>>>> [11279.498254] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/
>>>> 0x160
>>>> [11279.498257] INFO: task glusteriotwr1:14950 blocked for more than 120
>>>> seconds.
>>>> [11279.499789] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
>>>> disables this message.
>>>> [11279.501343] glusteriotwr1 D ffff97208b6daf70 0 14950 1
>>>> 0x00000080
>>>> [11279.501348] Call Trace:
>>>> [11279.501353] [<ffffffffb9913f79>] schedule+0x29/0x70
>>>> [11279.501390] [<ffffffffc060e388>] _xfs_log_force_lsn+0x2e8/0x340
>>>> [xfs]
>>>> [11279.501396] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20
>>>> [11279.501428] [<ffffffffc05eeb97>] xfs_file_fsync+0x107/0x1e0 [xfs]
>>>> [11279.501432] [<ffffffffb944ef3f>] generic_write_sync+0x4f/0x70
>>>> [11279.501461] [<ffffffffc05f0545>] xfs_file_aio_write+0x155/0x1b0
>>>> [xfs]
>>>> [11279.501466] [<ffffffffb941a533>] do_sync_write+0x93/0xe0
>>>> [11279.501471] [<ffffffffb941b010>] vfs_write+0xc0/0x1f0
>>>> [11279.501475] [<ffffffffb941c002>] SyS_pwrite64+0x92/0xc0
>>>> [11279.501479] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/
>>>> 0x160
>>>> [11279.501483] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21
>>>> [11279.501489] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/
>>>> 0x160
>>>> [11279.501493] INFO: task glusteriotwr4:14953 blocked for more than 120
>>>> seconds.
>>>> [11279.503047] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
>>>> disables this message.
>>>> [11279.504630] glusteriotwr4 D ffff972499f2bf40 0 14953 1
>>>> 0x00000080
>>>> [11279.504635] Call Trace:
>>>> [11279.504640] [<ffffffffb9913f79>] schedule+0x29/0x70
>>>> [11279.504676] [<ffffffffc060e388>] _xfs_log_force_lsn+0x2e8/0x340
>>>> [xfs]
>>>> [11279.504681] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20
>>>> [11279.504710] [<ffffffffc05eeb97>] xfs_file_fsync+0x107/0x1e0 [xfs]
>>>> [11279.504714] [<ffffffffb944f0e7>] do_fsync+0x67/0xb0
>>>> [11279.504718] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/
>>>> 0x160
>>>> [11279.504722] [<ffffffffb944f3d0>] SyS_fsync+0x10/0x20
>>>> [11279.504725] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21
>>>> [11279.504730] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/
>>>> 0x160
>>>> [12127.466494] perf: interrupt took too long (8263 > 8150), lowering
>>>> kernel.perf_event_max_sample_rate to 24000
>>>>
>>>> --------------------
>>>> I think this is the cause of the massive ovirt performance issues
>>>> irrespective of gluster volume. At the time this happened, I was also
>>>> ssh'ed into the host, and was doing some rpm querry commands. I had just
>>>> run rpm -qa |grep glusterfs (to verify what version was actually
>>>> installed), and that command took almost 2 minutes to return! Normally it
>>>> takes less than 2 seconds. That is all pure local SSD IO, too....
>>>>
>>>> I'm no expert, but its my understanding that anytime a software causes
>>>> these kinds of issues, its a serious bug in the software, even if its
>>>> mis-handled exceptions. Is this correct?
>>>>
>>>> --Jim
>>>>
>>>> On Tue, May 29, 2018 at 3:01 PM, Jim Kusznir <jim at palousetech.com>
>>>> wrote:
>>>>
>>>>> I think this is the profile information for one of the volumes that
>>>>> lives on the SSDs and is fully operational with no down/problem disks:
>>>>>
>>>>> [root at ovirt2 yum.repos.d]# gluster volume profile data info
>>>>> Brick: ovirt2.nwfiber.com:/gluster/brick2/data
>>>>> ----------------------------------------------
>>>>> Cumulative Stats:
>>>>> Block Size: 256b+ 512b+
>>>>> 1024b+
>>>>> No. of Reads: 983 2696
>>>>> 1059
>>>>> No. of Writes: 0 1113
>>>>> 302
>>>>>
>>>>> Block Size: 2048b+ 4096b+
>>>>> 8192b+
>>>>> No. of Reads: 852 88608
>>>>> 53526
>>>>> No. of Writes: 522 812340
>>>>> 76257
>>>>>
>>>>> Block Size: 16384b+ 32768b+
>>>>> 65536b+
>>>>> No. of Reads: 54351 241901
>>>>> 15024
>>>>> No. of Writes: 21636 8656
>>>>> 8976
>>>>>
>>>>> Block Size: 131072b+
>>>>> No. of Reads: 524156
>>>>> No. of Writes: 296071
>>>>> %-latency Avg-latency Min-Latency Max-Latency No. of calls
>>>>> Fop
>>>>> --------- ----------- ----------- ----------- ------------
>>>>> ----
>>>>> 0.00 0.00 us 0.00 us 0.00 us 4189
>>>>> RELEASE
>>>>> 0.00 0.00 us 0.00 us 0.00 us 1257
>>>>> RELEASEDIR
>>>>> 0.00 46.19 us 12.00 us 187.00 us 69
>>>>> FLUSH
>>>>> 0.00 147.00 us 78.00 us 367.00 us 86
>>>>> REMOVEXATTR
>>>>> 0.00 223.46 us 24.00 us 1166.00 us 149
>>>>> READDIR
>>>>> 0.00 565.34 us 76.00 us 3639.00 us 88
>>>>> FTRUNCATE
>>>>> 0.00 263.28 us 20.00 us 28385.00 us 228
>>>>> LK
>>>>> 0.00 98.84 us 2.00 us 880.00 us 1198
>>>>> OPENDIR
>>>>> 0.00 91.59 us 26.00 us 10371.00 us 3853
>>>>> STATFS
>>>>> 0.00 494.14 us 17.00 us 193439.00 us 1171
>>>>> GETXATTR
>>>>> 0.00 299.42 us 35.00 us 9799.00 us 2044
>>>>> READDIRP
>>>>> 0.00 1965.31 us 110.00 us 382258.00 us 321
>>>>> XATTROP
>>>>> 0.01 113.40 us 24.00 us 61061.00 us 8134
>>>>> STAT
>>>>> 0.01 755.38 us 57.00 us 607603.00 us 3196
>>>>> DISCARD
>>>>> 0.05 2690.09 us 58.00 us 2704761.00 us 3206
>>>>> OPEN
>>>>> 0.10 119978.25 us 97.00 us 9406684.00 us 154
>>>>> SETATTR
>>>>> 0.18 101.73 us 28.00 us 700477.00 us 313379
>>>>> FSTAT
>>>>> 0.23 1059.84 us 25.00 us 2716124.00 us 38255
>>>>> LOOKUP
>>>>> 0.47 1024.11 us 54.00 us 6197164.00 us 81455
>>>>> FXATTROP
>>>>> 1.72 2984.00 us 15.00 us 37098954.00 us 103020
>>>>> FINODELK
>>>>> 5.92 44315.32 us 51.00 us 24731536.00 us 23957
>>>>> FSYNC
>>>>> 13.27 2399.78 us 25.00 us 22089540.00 us 991005
>>>>> READ
>>>>> 37.00 5980.43 us 52.00 us 22099889.00 us 1108976
>>>>> WRITE
>>>>> 41.04 5452.75 us 13.00 us 22102452.00 us 1349053
>>>>> INODELK
>>>>>
>>>>> Duration: 10026 seconds
>>>>> Data Read: 80046027759 bytes
>>>>> Data Written: 44496632320 bytes
>>>>>
>>>>> Interval 1 Stats:
>>>>> Block Size: 256b+ 512b+
>>>>> 1024b+
>>>>> No. of Reads: 983 2696
>>>>> 1059
>>>>> No. of Writes: 0 838
>>>>> 185
>>>>>
>>>>> Block Size: 2048b+ 4096b+
>>>>> 8192b+
>>>>> No. of Reads: 852 85856
>>>>> 51575
>>>>> No. of Writes: 382 705802
>>>>> 57812
>>>>>
>>>>> Block Size: 16384b+ 32768b+
>>>>> 65536b+
>>>>> No. of Reads: 52673 232093
>>>>> 14984
>>>>> No. of Writes: 13499 4908
>>>>> 4242
>>>>>
>>>>> Block Size: 131072b+
>>>>> No. of Reads: 460040
>>>>> No. of Writes: 6411
>>>>> %-latency Avg-latency Min-Latency Max-Latency No. of calls
>>>>> Fop
>>>>> --------- ----------- ----------- ----------- ------------
>>>>> ----
>>>>> 0.00 0.00 us 0.00 us 0.00 us 2093
>>>>> RELEASE
>>>>> 0.00 0.00 us 0.00 us 0.00 us 1093
>>>>> RELEASEDIR
>>>>> 0.00 53.38 us 26.00 us 111.00 us 16
>>>>> FLUSH
>>>>> 0.00 145.14 us 78.00 us 367.00 us 71
>>>>> REMOVEXATTR
>>>>> 0.00 190.96 us 114.00 us 298.00 us 71
>>>>> SETATTR
>>>>> 0.00 213.38 us 24.00 us 1145.00 us 90
>>>>> READDIR
>>>>> 0.00 263.28 us 20.00 us 28385.00 us 228
>>>>> LK
>>>>> 0.00 101.76 us 2.00 us 880.00 us 1093
>>>>> OPENDIR
>>>>> 0.01 93.60 us 27.00 us 10371.00 us 3090
>>>>> STATFS
>>>>> 0.02 537.47 us 17.00 us 193439.00 us 1038
>>>>> GETXATTR
>>>>> 0.03 297.44 us 35.00 us 9799.00 us 1990
>>>>> READDIRP
>>>>> 0.03 2357.28 us 110.00 us 382258.00 us 253
>>>>> XATTROP
>>>>> 0.04 385.93 us 58.00 us 47593.00 us 2091
>>>>> OPEN
>>>>> 0.04 114.86 us 24.00 us 61061.00 us 7715
>>>>> STAT
>>>>> 0.06 444.59 us 57.00 us 333240.00 us 3053
>>>>> DISCARD
>>>>> 0.42 316.24 us 25.00 us 290728.00 us 29823
>>>>> LOOKUP
>>>>> 0.73 257.92 us 54.00 us 344812.00 us 63296
>>>>> FXATTROP
>>>>> 1.37 98.30 us 28.00 us 67621.00 us 313172
>>>>> FSTAT
>>>>> 1.58 2124.69 us 51.00 us 849200.00 us 16717
>>>>> FSYNC
>>>>> 5.73 162.46 us 52.00 us 748492.00 us 794079
>>>>> WRITE
>>>>> 7.19 2065.17 us 16.00 us 37098954.00 us 78381
>>>>> FINODELK
>>>>> 36.44 886.32 us 25.00 us 2216436.00 us 925421
>>>>> READ
>>>>> 46.30 1178.04 us 13.00 us 1700704.00 us 884635
>>>>> INODELK
>>>>>
>>>>> Duration: 7485 seconds
>>>>> Data Read: 71250527215 bytes
>>>>> Data Written: 5119903744 bytes
>>>>>
>>>>> Brick: ovirt3.nwfiber.com:/gluster/brick2/data
>>>>> ----------------------------------------------
>>>>> Cumulative Stats:
>>>>> Block Size: 1b+
>>>>> No. of Reads: 0
>>>>> No. of Writes: 3264419
>>>>> %-latency Avg-latency Min-Latency Max-Latency No. of calls
>>>>> Fop
>>>>> --------- ----------- ----------- ----------- ------------
>>>>> ----
>>>>> 0.00 0.00 us 0.00 us 0.00 us 90
>>>>> FORGET
>>>>> 0.00 0.00 us 0.00 us 0.00 us 9462
>>>>> RELEASE
>>>>> 0.00 0.00 us 0.00 us 0.00 us 4254
>>>>> RELEASEDIR
>>>>> 0.00 50.52 us 13.00 us 190.00 us 71
>>>>> FLUSH
>>>>> 0.00 186.97 us 87.00 us 713.00 us 86
>>>>> REMOVEXATTR
>>>>> 0.00 79.32 us 33.00 us 189.00 us 228
>>>>> LK
>>>>> 0.00 220.98 us 129.00 us 513.00 us 86
>>>>> SETATTR
>>>>> 0.01 259.30 us 26.00 us 2632.00 us 137
>>>>> READDIR
>>>>> 0.02 322.76 us 145.00 us 2125.00 us 321
>>>>> XATTROP
>>>>> 0.03 109.55 us 2.00 us 1258.00 us 1193
>>>>> OPENDIR
>>>>> 0.05 70.21 us 21.00 us 431.00 us 3196
>>>>> DISCARD
>>>>> 0.05 169.26 us 21.00 us 2315.00 us 1545
>>>>> GETXATTR
>>>>> 0.12 176.85 us 63.00 us 2844.00 us 3206
>>>>> OPEN
>>>>> 0.61 303.49 us 90.00 us 3085.00 us 9633
>>>>> FSTAT
>>>>> 2.44 305.66 us 28.00 us 3716.00 us 38230
>>>>> LOOKUP
>>>>> 4.52 266.22 us 55.00 us 53424.00 us 81455
>>>>> FXATTROP
>>>>> 6.96 1397.99 us 51.00 us 64822.00 us 23889
>>>>> FSYNC
>>>>> 16.48 84.74 us 25.00 us 6917.00 us 932592
>>>>> WRITE
>>>>> 30.16 106.90 us 13.00 us 3920189.00 us 1353046
>>>>> INODELK
>>>>> 38.55 1794.52 us 14.00 us 16210553.00 us 103039
>>>>> FINODELK
>>>>>
>>>>> Duration: 66562 seconds
>>>>> Data Read: 0 bytes
>>>>> Data Written: 3264419 bytes
>>>>>
>>>>> Interval 1 Stats:
>>>>> Block Size: 1b+
>>>>> No. of Reads: 0
>>>>> No. of Writes: 794080
>>>>> %-latency Avg-latency Min-Latency Max-Latency No. of calls
>>>>> Fop
>>>>> --------- ----------- ----------- ----------- ------------
>>>>> ----
>>>>> 0.00 0.00 us 0.00 us 0.00 us 2093
>>>>> RELEASE
>>>>> 0.00 0.00 us 0.00 us 0.00 us 1093
>>>>> RELEASEDIR
>>>>> 0.00 70.31 us 26.00 us 125.00 us 16
>>>>> FLUSH
>>>>> 0.00 193.10 us 103.00 us 713.00 us 71
>>>>> REMOVEXATTR
>>>>> 0.01 227.32 us 133.00 us 513.00 us 71
>>>>> SETATTR
>>>>> 0.01 79.32 us 33.00 us 189.00 us 228
>>>>> LK
>>>>> 0.01 259.83 us 35.00 us 1138.00 us 89
>>>>> READDIR
>>>>> 0.03 318.26 us 145.00 us 2047.00 us 253
>>>>> XATTROP
>>>>> 0.04 112.67 us 3.00 us 1258.00 us 1093
>>>>> OPENDIR
>>>>> 0.06 167.98 us 23.00 us 1951.00 us 1014
>>>>> GETXATTR
>>>>> 0.08 70.97 us 22.00 us 431.00 us 3053
>>>>> DISCARD
>>>>> 0.13 183.78 us 66.00 us 2844.00 us 2091
>>>>> OPEN
>>>>> 1.01 303.82 us 90.00 us 3085.00 us 9610
>>>>> FSTAT
>>>>> 3.27 316.59 us 30.00 us 3716.00 us 29820
>>>>> LOOKUP
>>>>> 5.83 265.79 us 59.00 us 53424.00 us 63296
>>>>> FXATTROP
>>>>> 7.95 1373.89 us 51.00 us 64822.00 us 16717
>>>>> FSYNC
>>>>> 23.17 851.99 us 14.00 us 16210553.00 us 78555
>>>>> FINODELK
>>>>> 24.04 87.44 us 27.00 us 6917.00 us 794081
>>>>> WRITE
>>>>> 34.36 111.91 us 14.00 us 984871.00 us 886790
>>>>> INODELK
>>>>>
>>>>> Duration: 7485 seconds
>>>>> Data Read: 0 bytes
>>>>> Data Written: 794080 bytes
>>>>>
>>>>>
>>>>> -----------------------
>>>>> Here is the data from the volume that is backed by the SHDDs and has
>>>>> one failed disk:
>>>>> [root at ovirt2 yum.repos.d]# gluster volume profile data-hdd info
>>>>> Brick: 172.172.1.12:/gluster/brick3/data-hdd
>>>>> --------------------------------------------
>>>>> Cumulative Stats:
>>>>> Block Size: 256b+ 512b+
>>>>> 1024b+
>>>>> No. of Reads: 1702 86
>>>>> 16
>>>>> No. of Writes: 0 767
>>>>> 71
>>>>>
>>>>> Block Size: 2048b+ 4096b+
>>>>> 8192b+
>>>>> No. of Reads: 19 51841
>>>>> 2049
>>>>> No. of Writes: 76 60668
>>>>> 35727
>>>>>
>>>>> Block Size: 16384b+ 32768b+
>>>>> 65536b+
>>>>> No. of Reads: 1744 639
>>>>> 1088
>>>>> No. of Writes: 8524 2410
>>>>> 1285
>>>>>
>>>>> Block Size: 131072b+
>>>>> No. of Reads: 771999
>>>>> No. of Writes: 29584
>>>>> %-latency Avg-latency Min-Latency Max-Latency No. of calls
>>>>> Fop
>>>>> --------- ----------- ----------- ----------- ------------
>>>>> ----
>>>>> 0.00 0.00 us 0.00 us 0.00 us 2902
>>>>> RELEASE
>>>>> 0.00 0.00 us 0.00 us 0.00 us 1517
>>>>> RELEASEDIR
>>>>> 0.00 197.00 us 197.00 us 197.00 us 1
>>>>> FTRUNCATE
>>>>> 0.00 70.24 us 16.00 us 758.00 us 51
>>>>> FLUSH
>>>>> 0.00 143.93 us 82.00 us 305.00 us 57
>>>>> REMOVEXATTR
>>>>> 0.00 178.63 us 105.00 us 712.00 us 60
>>>>> SETATTR
>>>>> 0.00 67.30 us 19.00 us 572.00 us 555
>>>>> LK
>>>>> 0.00 322.80 us 23.00 us 4673.00 us 138
>>>>> READDIR
>>>>> 0.00 336.56 us 106.00 us 11994.00 us 237
>>>>> XATTROP
>>>>> 0.00 84.70 us 28.00 us 1071.00 us 3469
>>>>> STATFS
>>>>> 0.01 387.75 us 2.00 us 146017.00 us 1467
>>>>> OPENDIR
>>>>> 0.01 148.59 us 21.00 us 64374.00 us 4454
>>>>> STAT
>>>>> 0.02 783.02 us 16.00 us 93502.00 us 1902
>>>>> GETXATTR
>>>>> 0.03 1516.10 us 17.00 us 210690.00 us 1364
>>>>> ENTRYLK
>>>>> 0.03 2555.47 us 300.00 us 674454.00 us 1064
>>>>> READDIRP
>>>>> 0.07 85.74 us 19.00 us 68340.00 us 62849
>>>>> FSTAT
>>>>> 0.07 1978.12 us 59.00 us 202596.00 us 2729
>>>>> OPEN
>>>>> 0.22 708.57 us 15.00 us 394799.00 us 25447
>>>>> LOOKUP
>>>>> 5.94 2331.74 us 15.00 us 1099530.00 us 207534
>>>>> FINODELK
>>>>> 7.31 8311.75 us 58.00 us 1800216.00 us 71668
>>>>> FXATTROP
>>>>> 12.49 7735.19 us 51.00 us 3595513.00 us 131642
>>>>> WRITE
>>>>> 17.70 957.08 us 16.00 us 13700466.00 us 1508160
>>>>> INODELK
>>>>> 24.55 2546.43 us 26.00 us 5077347.00 us 786060
>>>>> READ
>>>>> 31.56 49699.15 us 47.00 us 3746331.00 us 51777
>>>>> FSYNC
>>>>>
>>>>> Duration: 10101 seconds
>>>>> Data Read: 101562897361 bytes
>>>>> Data Written: 4834450432 bytes
>>>>>
>>>>> Interval 0 Stats:
>>>>> Block Size: 256b+ 512b+
>>>>> 1024b+
>>>>> No. of Reads: 1702 86
>>>>> 16
>>>>> No. of Writes: 0 767
>>>>> 71
>>>>>
>>>>> Block Size: 2048b+ 4096b+
>>>>> 8192b+
>>>>> No. of Reads: 19 51841
>>>>> 2049
>>>>> No. of Writes: 76 60668
>>>>> 35727
>>>>>
>>>>> Block Size: 16384b+ 32768b+
>>>>> 65536b+
>>>>> No. of Reads: 1744 639
>>>>> 1088
>>>>> No. of Writes: 8524 2410
>>>>> 1285
>>>>>
>>>>> Block Size: 131072b+
>>>>> No. of Reads: 771999
>>>>> No. of Writes: 29584
>>>>> %-latency Avg-latency Min-Latency Max-Latency No. of calls
>>>>> Fop
>>>>> --------- ----------- ----------- ----------- ------------
>>>>> ----
>>>>> 0.00 0.00 us 0.00 us 0.00 us 2902
>>>>> RELEASE
>>>>> 0.00 0.00 us 0.00 us 0.00 us 1517
>>>>> RELEASEDIR
>>>>> 0.00 197.00 us 197.00 us 197.00 us 1
>>>>> FTRUNCATE
>>>>> 0.00 70.24 us 16.00 us 758.00 us 51
>>>>> FLUSH
>>>>> 0.00 143.93 us 82.00 us 305.00 us 57
>>>>> REMOVEXATTR
>>>>> 0.00 178.63 us 105.00 us 712.00 us 60
>>>>> SETATTR
>>>>> 0.00 67.30 us 19.00 us 572.00 us 555
>>>>> LK
>>>>> 0.00 322.80 us 23.00 us 4673.00 us 138
>>>>> READDIR
>>>>> 0.00 336.56 us 106.00 us 11994.00 us 237
>>>>> XATTROP
>>>>> 0.00 84.70 us 28.00 us 1071.00 us 3469
>>>>> STATFS
>>>>> 0.01 387.75 us 2.00 us 146017.00 us 1467
>>>>> OPENDIR
>>>>> 0.01 148.59 us 21.00 us 64374.00 us 4454
>>>>> STAT
>>>>> 0.02 783.02 us 16.00 us 93502.00 us 1902
>>>>> GETXATTR
>>>>> 0.03 1516.10 us 17.00 us 210690.00 us 1364
>>>>> ENTRYLK
>>>>> 0.03 2555.47 us 300.00 us 674454.00 us 1064
>>>>> READDIRP
>>>>> 0.07 85.73 us 19.00 us 68340.00 us 62849
>>>>> FSTAT
>>>>> 0.07 1978.12 us 59.00 us 202596.00 us 2729
>>>>> OPEN
>>>>> 0.22 708.57 us 15.00 us 394799.00 us 25447
>>>>> LOOKUP
>>>>> 5.94 2334.57 us 15.00 us 1099530.00 us 207534
>>>>> FINODELK
>>>>> 7.31 8311.49 us 58.00 us 1800216.00 us 71668
>>>>> FXATTROP
>>>>> 12.49 7735.32 us 51.00 us 3595513.00 us 131642
>>>>> WRITE
>>>>> 17.71 957.08 us 16.00 us 13700466.00 us 1508160
>>>>> INODELK
>>>>> 24.56 2546.42 us 26.00 us 5077347.00 us 786060
>>>>> READ
>>>>> 31.54 49651.63 us 47.00 us 3746331.00 us 51777
>>>>> FSYNC
>>>>>
>>>>> Duration: 10101 seconds
>>>>> Data Read: 101562897361 bytes
>>>>> Data Written: 4834450432 bytes
>>>>>
>>>>>
>>>>> On Tue, May 29, 2018 at 2:55 PM, Jim Kusznir <jim at palousetech.com>
>>>>> wrote:
>>>>>
>>>>>> Thank you for your response.
>>>>>>
>>>>>> I have 4 gluster volumes. 3 are replica 2 + arbitrator. replica
>>>>>> bricks are on ovirt1 and ovirt2, arbitrator on ovirt3. The 4th volume is
>>>>>> replica 3, with a brick on all three ovirt machines.
>>>>>>
>>>>>> The first 3 volumes are on an SSD disk; the 4th is on a Seagate SSHD
>>>>>> (same in all three machines). On ovirt3, the SSHD has reported hard IO
>>>>>> failures, and that brick is offline. However, the other two replicas are
>>>>>> fully operational (although they still show contents in the heal info
>>>>>> command that won't go away, but that may be the case until I replace the
>>>>>> failed disk).
>>>>>>
>>>>>> What is bothering me is that ALL 4 gluster volumes are showing
>>>>>> horrible performance issues. At this point, as the bad disk has been
>>>>>> completely offlined, I would expect gluster to perform at normal speed, but
>>>>>> that is definitely not the case.
>>>>>>
>>>>>> I've also noticed that the performance hits seem to come in waves:
>>>>>> things seem to work acceptably (but slow) for a while, then suddenly, its
>>>>>> as if all disk IO on all volumes (including non-gluster local OS disk
>>>>>> volumes for the hosts) pause for about 30 seconds, then IO resumes again.
>>>>>> During those times, I start getting VM not responding and host not
>>>>>> responding notices as well as the applications having major issues.
>>>>>>
>>>>>> I've shut down most of my VMs and am down to just my essential core
>>>>>> VMs (shedded about 75% of my VMs). I still am experiencing the same issues.
>>>>>>
>>>>>> Am I correct in believing that once the failed disk was brought
>>>>>> offline that performance should return to normal?
>>>>>>
>>>>>> On Tue, May 29, 2018 at 1:27 PM, Alex K <rightkicktech at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> I would check disks status and accessibility of mount points where
>>>>>>> your gluster volumes reside.
>>>>>>>
>>>>>>> On Tue, May 29, 2018, 22:28 Jim Kusznir <jim at palousetech.com> wrote:
>>>>>>>
>>>>>>>> On one ovirt server, I'm now seeing these messages:
>>>>>>>> [56474.239725] blk_update_request: 63 callbacks suppressed
>>>>>>>> [56474.239732] blk_update_request: I/O error, dev dm-2, sector 0
>>>>>>>> [56474.240602] blk_update_request: I/O error, dev dm-2, sector
>>>>>>>> 3905945472
>>>>>>>> [56474.241346] blk_update_request: I/O error, dev dm-2, sector
>>>>>>>> 3905945584
>>>>>>>> [56474.242236] blk_update_request: I/O error, dev dm-2, sector 2048
>>>>>>>> [56474.243072] blk_update_request: I/O error, dev dm-2, sector
>>>>>>>> 3905943424
>>>>>>>> [56474.243997] blk_update_request: I/O error, dev dm-2, sector
>>>>>>>> 3905943536
>>>>>>>> [56474.247347] blk_update_request: I/O error, dev dm-2, sector 0
>>>>>>>> [56474.248315] blk_update_request: I/O error, dev dm-2, sector
>>>>>>>> 3905945472
>>>>>>>> [56474.249231] blk_update_request: I/O error, dev dm-2, sector
>>>>>>>> 3905945584
>>>>>>>> [56474.250221] blk_update_request: I/O error, dev dm-2, sector 2048
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Tue, May 29, 2018 at 11:59 AM, Jim Kusznir <jim at palousetech.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> I see in messages on ovirt3 (my 3rd machine, the one upgraded to
>>>>>>>>> 4.2):
>>>>>>>>>
>>>>>>>>> May 29 11:54:41 ovirt3 ovs-vsctl: ovs|00001|db_ctl_base|ERR|unix:/var/run/openvswitch/db.sock:
>>>>>>>>> database connection failed (No such file or directory)
>>>>>>>>> May 29 11:54:51 ovirt3 ovs-vsctl: ovs|00001|db_ctl_base|ERR|unix:/var/run/openvswitch/db.sock:
>>>>>>>>> database connection failed (No such file or directory)
>>>>>>>>> May 29 11:55:01 ovirt3 ovs-vsctl: ovs|00001|db_ctl_base|ERR|unix:/var/run/openvswitch/db.sock:
>>>>>>>>> database connection failed (No such file or directory)
>>>>>>>>> (appears a lot).
>>>>>>>>>
>>>>>>>>> I also found on the ssh session of that, some sysv warnings about
>>>>>>>>> the backing disk for one of the gluster volumes (straight replica 3). The
>>>>>>>>> glusterfs process for that disk on that machine went offline. Its my
>>>>>>>>> understanding that it should continue to work with the other two machines
>>>>>>>>> while I attempt to replace that disk, right? Attempted writes (touching an
>>>>>>>>> empty file) can take 15 seconds, repeating it later will be much faster.
>>>>>>>>>
>>>>>>>>> Gluster generates a bunch of different log files, I don't know
>>>>>>>>> what ones you want, or from which machine(s).
>>>>>>>>>
>>>>>>>>> How do I do "volume profiling"?
>>>>>>>>>
>>>>>>>>> Thanks!
>>>>>>>>>
>>>>>>>>> On Tue, May 29, 2018 at 11:53 AM, Sahina Bose <sabose at redhat.com>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> Do you see errors reported in the mount logs for the volume? If
>>>>>>>>>> so, could you attach the logs?
>>>>>>>>>> Any issues with your underlying disks. Can you also attach output
>>>>>>>>>> of volume profiling?
>>>>>>>>>>
>>>>>>>>>> On Wed, May 30, 2018 at 12:13 AM, Jim Kusznir <
>>>>>>>>>> jim at palousetech.com> wrote:
>>>>>>>>>>
>>>>>>>>>>> Ok, things have gotten MUCH worse this morning. I'm getting
>>>>>>>>>>> random errors from VMs, right now, about a third of my VMs have been paused
>>>>>>>>>>> due to storage issues, and most of the remaining VMs are not performing
>>>>>>>>>>> well.
>>>>>>>>>>>
>>>>>>>>>>> At this point, I am in full EMERGENCY mode, as my production
>>>>>>>>>>> services are now impacted, and I'm getting calls coming in with problems...
>>>>>>>>>>>
>>>>>>>>>>> I'd greatly appreciate help...VMs are running VERY slowly (when
>>>>>>>>>>> they run), and they are steadily getting worse. I don't know why. I was
>>>>>>>>>>> seeing CPU peaks (to 100%) on several VMs, in perfect sync, for a few
>>>>>>>>>>> minutes at a time (while the VM became unresponsive and any VMs I was
>>>>>>>>>>> logged into that were linux were giving me the CPU stuck messages in my
>>>>>>>>>>> origional post). Is all this storage related?
>>>>>>>>>>>
>>>>>>>>>>> I also have two different gluster volumes for VM storage, and
>>>>>>>>>>> only one had the issues, but now VMs in both are being affected at the same
>>>>>>>>>>> time and same way.
>>>>>>>>>>>
>>>>>>>>>>> --Jim
>>>>>>>>>>>
>>>>>>>>>>> On Mon, May 28, 2018 at 10:50 PM, Sahina Bose <sabose at redhat.com
>>>>>>>>>>> > wrote:
>>>>>>>>>>>
>>>>>>>>>>>> [Adding gluster-users to look at the heal issue]
>>>>>>>>>>>>
>>>>>>>>>>>> On Tue, May 29, 2018 at 9:17 AM, Jim Kusznir <
>>>>>>>>>>>> jim at palousetech.com> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> Hello:
>>>>>>>>>>>>>
>>>>>>>>>>>>> I've been having some cluster and gluster performance issues
>>>>>>>>>>>>> lately. I also found that my cluster was out of date, and was trying to
>>>>>>>>>>>>> apply updates (hoping to fix some of these), and discovered the ovirt 4.1
>>>>>>>>>>>>> repos were taken completely offline. So, I was forced to begin an upgrade
>>>>>>>>>>>>> to 4.2. According to docs I found/read, I needed only add the new repo, do
>>>>>>>>>>>>> a yum update, reboot, and be good on my hosts (did the yum update, the
>>>>>>>>>>>>> engine-setup on my hosted engine). Things seemed to work relatively well,
>>>>>>>>>>>>> except for a gluster sync issue that showed up.
>>>>>>>>>>>>>
>>>>>>>>>>>>> My cluster is a 3 node hyperconverged cluster. I upgraded the
>>>>>>>>>>>>> hosted engine first, then engine 3. When engine 3 came back up, for some
>>>>>>>>>>>>> reason one of my gluster volumes would not sync. Here's sample output:
>>>>>>>>>>>>>
>>>>>>>>>>>>> [root at ovirt3 ~]# gluster volume heal data-hdd info
>>>>>>>>>>>>> Brick 172.172.1.11:/gluster/brick3/data-hdd
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/48d7ecb8-7ac5-4
>>>>>>>>>>>>> 725-bca5-b3519681cf2f/0d6080b0-7018-4fa3-bb82-1dd9ef07d9b9
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/647be733-f153-4
>>>>>>>>>>>>> cdc-85bd-ba72544c2631/b453a300-0602-4be1-8310-8bd5abe00971
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/6da854d1-b6be-4
>>>>>>>>>>>>> 46b-9bf0-90a0dbbea830/3c93bd1f-b7fa-4aa2-b445-6904e31839ba
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/7f647567-d18c-4
>>>>>>>>>>>>> 4f1-a58e-9b8865833acb/f9364470-9770-4bb1-a6b9-a54861849625
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/f3c8e7aa-6ef2-4
>>>>>>>>>>>>> 2a7-93d4-e0a4df6dd2fa/2eb0b1ad-2606-44ef-9cd3-ae59610a504b
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/b1ea3f62-0f05-4
>>>>>>>>>>>>> ded-8c82-9c91c90e0b61/d5d6bf5a-499f-431d-9013-5453db93ed32
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/8c8b5147-e9d6-4
>>>>>>>>>>>>> 810-b45b-185e3ed65727/16f08231-93b0-489d-a2fd-687b6bf88eaa
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/12924435-b9c2-4
>>>>>>>>>>>>> aab-ba19-1c1bc31310ef/07b3db69-440e-491e-854c-bbfa18a7cff2
>>>>>>>>>>>>> Status: Connected
>>>>>>>>>>>>> Number of entries: 8
>>>>>>>>>>>>>
>>>>>>>>>>>>> Brick 172.172.1.12:/gluster/brick3/data-hdd
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/48d7ecb8-7ac5-4
>>>>>>>>>>>>> 725-bca5-b3519681cf2f/0d6080b0-7018-4fa3-bb82-1dd9ef07d9b9
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/647be733-f153-4
>>>>>>>>>>>>> cdc-85bd-ba72544c2631/b453a300-0602-4be1-8310-8bd5abe00971
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/b1ea3f62-0f05-4
>>>>>>>>>>>>> ded-8c82-9c91c90e0b61/d5d6bf5a-499f-431d-9013-5453db93ed32
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/6da854d1-b6be-4
>>>>>>>>>>>>> 46b-9bf0-90a0dbbea830/3c93bd1f-b7fa-4aa2-b445-6904e31839ba
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/7f647567-d18c-4
>>>>>>>>>>>>> 4f1-a58e-9b8865833acb/f9364470-9770-4bb1-a6b9-a54861849625
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/8c8b5147-e9d6-4
>>>>>>>>>>>>> 810-b45b-185e3ed65727/16f08231-93b0-489d-a2fd-687b6bf88eaa
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/12924435-b9c2-4
>>>>>>>>>>>>> aab-ba19-1c1bc31310ef/07b3db69-440e-491e-854c-bbfa18a7cff2
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/f3c8e7aa-6ef2-4
>>>>>>>>>>>>> 2a7-93d4-e0a4df6dd2fa/2eb0b1ad-2606-44ef-9cd3-ae59610a504b
>>>>>>>>>>>>> Status: Connected
>>>>>>>>>>>>> Number of entries: 8
>>>>>>>>>>>>>
>>>>>>>>>>>>> Brick 172.172.1.13:/gluster/brick3/data-hdd
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/b1ea3f62-0f05-4
>>>>>>>>>>>>> ded-8c82-9c91c90e0b61/d5d6bf5a-499f-431d-9013-5453db93ed32
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/8c8b5147-e9d6-4
>>>>>>>>>>>>> 810-b45b-185e3ed65727/16f08231-93b0-489d-a2fd-687b6bf88eaa
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/12924435-b9c2-4
>>>>>>>>>>>>> aab-ba19-1c1bc31310ef/07b3db69-440e-491e-854c-bbfa18a7cff2
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/f3c8e7aa-6ef2-4
>>>>>>>>>>>>> 2a7-93d4-e0a4df6dd2fa/2eb0b1ad-2606-44ef-9cd3-ae59610a504b
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/647be733-f153-4
>>>>>>>>>>>>> cdc-85bd-ba72544c2631/b453a300-0602-4be1-8310-8bd5abe00971
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/48d7ecb8-7ac5-4
>>>>>>>>>>>>> 725-bca5-b3519681cf2f/0d6080b0-7018-4fa3-bb82-1dd9ef07d9b9
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/6da854d1-b6be-4
>>>>>>>>>>>>> 46b-9bf0-90a0dbbea830/3c93bd1f-b7fa-4aa2-b445-6904e31839ba
>>>>>>>>>>>>> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/7f647567-d18c-4
>>>>>>>>>>>>> 4f1-a58e-9b8865833acb/f9364470-9770-4bb1-a6b9-a54861849625
>>>>>>>>>>>>> Status: Connected
>>>>>>>>>>>>> Number of entries: 8
>>>>>>>>>>>>>
>>>>>>>>>>>>> ---------
>>>>>>>>>>>>> Its been in this state for a couple days now, and bandwidth
>>>>>>>>>>>>> monitoring shows no appreciable data moving. I've tried repeatedly
>>>>>>>>>>>>> commanding a full heal from all three clusters in the node. Its always the
>>>>>>>>>>>>> same files that need healing.
>>>>>>>>>>>>>
>>>>>>>>>>>>> When running gluster volume heal data-hdd statistics, I see
>>>>>>>>>>>>> sometimes different information, but always some number of "heal failed"
>>>>>>>>>>>>> entries. It shows 0 for split brain.
>>>>>>>>>>>>>
>>>>>>>>>>>>> I'm not quite sure what to do. I suspect it may be due to
>>>>>>>>>>>>> nodes 1 and 2 still being on the older ovirt/gluster release, but I'm
>>>>>>>>>>>>> afraid to upgrade and reboot them until I have a good gluster sync (don't
>>>>>>>>>>>>> need to create a split brain issue). How do I proceed with this?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Second issue: I've been experiencing VERY POOR performance on
>>>>>>>>>>>>> most of my VMs. To the tune that logging into a windows 10 vm via remote
>>>>>>>>>>>>> desktop can take 5 minutes, launching quickbooks inside said vm can easily
>>>>>>>>>>>>> take 10 minutes. On some linux VMs, I get random messages like this:
>>>>>>>>>>>>> Message from syslogd at unifi at May 28 20:39:23 ...
>>>>>>>>>>>>> kernel:[6171996.308904] NMI watchdog: BUG: soft lockup -
>>>>>>>>>>>>> CPU#0 stuck for 22s! [mongod:14766]
>>>>>>>>>>>>>
>>>>>>>>>>>>> (the process and PID are often different)
>>>>>>>>>>>>>
>>>>>>>>>>>>> I'm not quite sure what to do about this either. My initial
>>>>>>>>>>>>> thought was upgrad everything to current and see if its still there, but I
>>>>>>>>>>>>> cannot move forward with that until my gluster is healed...
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks!
>>>>>>>>>>>>> --Jim
>>>>>>>>>>>>>
>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>> Users mailing list -- users at ovirt.org
>>>>>>>>>>>>> To unsubscribe send an email to users-leave at ovirt.org
>>>>>>>>>>>>> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
>>>>>>>>>>>>> oVirt Code of Conduct: https://www.ovirt.org/communit
>>>>>>>>>>>>> y/about/community-guidelines/
>>>>>>>>>>>>> List Archives: https://lists.ovirt.org/archiv
>>>>>>>>>>>>> es/list/users at ovirt.org/message/3LEV6ZQ3JV2XLAL7NYBTXOYMYUOT
>>>>>>>>>>>>> IRQF/
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Users mailing list -- users at ovirt.org
>>>>>>>> To unsubscribe send an email to users-leave at ovirt.org
>>>>>>>> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
>>>>>>>> oVirt Code of Conduct: https://www.ovirt.org/communit
>>>>>>>> y/about/community-guidelines/
>>>>>>>> List Archives: https://lists.ovirt.org/archiv
>>>>>>>> es/list/users at ovirt.org/message/ACO7RFSLBSRBAIONIC2HQ6Z24ZDES5MF/
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>> _______________________________________________
>>>> Users mailing list -- users at ovirt.org
>>>> To unsubscribe send an email to users-leave at ovirt.org
>>>> Privacy Statement: https://www.ovirt.org/site/privacy-policy/
>>>> oVirt Code of Conduct: https://www.ovirt.org/communit
>>>> y/about/community-guidelines/
>>>> List Archives: https://lists.ovirt.org/archiv
>>>> es/list/users at ovirt.org/message/3DEQQLJM3WHQNZJ7KEMRZVFZ52MTIL74/
>>>>
>>>>
>>>
>>
>
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