[Gluster-users] [ovirt-users] Re: Gluster problems, cluster performance issues

Krutika Dhananjay kdhananj at redhat.com
Wed May 30 09:44:42 UTC 2018


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
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