<div dir="ltr">Hi all again:<div><br></div><div>I'm now subscribed to gluster-users as well, so I should get any replies from that side too.</div><div><br></div><div>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.</div><div><br></div><div>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?</div><div><br></div><div>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:</div><div><br></div><div><div>[ 6604.536156] perf: interrupt took too long (9593 > 9565), lowering kernel.perf_event_max_sample_rate to 20000</div><div>[ 8280.188734] INFO: task xfsaild/dm-10:1061 blocked for more than 120 seconds.</div><div>[ 8280.188787] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.</div><div>[ 8280.188837] xfsaild/dm-10 D ffff93203a2eeeb0 0 1061 2 0x00000000</div><div>[ 8280.188843] Call Trace:</div><div>[ 8280.188857] [<ffffffff960a3a2e>] ? try_to_del_timer_sync+0x5e/0x90</div><div>[ 8280.188864] [<ffffffff96713f79>] schedule+0x29/0x70</div><div>[ 8280.188932] [<ffffffffc049fe36>] _xfs_log_force+0x1c6/0x2c0 [xfs]</div><div>[ 8280.188939] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20</div><div>[ 8280.188972] [<ffffffffc04abfec>] ? xfsaild+0x16c/0x6f0 [xfs]</div><div>[ 8280.189003] [<ffffffffc049ff5c>] xfs_log_force+0x2c/0x70 [xfs]</div><div>[ 8280.189035] [<ffffffffc04abe80>] ? xfs_trans_ail_cursor_first+0x90/0x90 [xfs]</div><div>[ 8280.189067] [<ffffffffc04abfec>] xfsaild+0x16c/0x6f0 [xfs]</div><div>[ 8280.189100] [<ffffffffc04abe80>] ? xfs_trans_ail_cursor_first+0x90/0x90 [xfs]</div><div>[ 8280.189105] [<ffffffff960bb161>] kthread+0xd1/0xe0</div><div>[ 8280.189109] [<ffffffff960bb090>] ? insert_kthread_work+0x40/0x40</div><div>[ 8280.189117] [<ffffffff96720677>] ret_from_fork_nospec_begin+0x21/0x21</div><div>[ 8280.189121] [<ffffffff960bb090>] ? insert_kthread_work+0x40/0x40</div><div>[ 8280.189161] INFO: task glusterclogfsyn:6421 blocked for more than 120 seconds.</div><div>[ 8280.189207] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.</div><div>[ 8280.189256] glusterclogfsyn D ffff93203a2edee0 0 6421 1 0x00000080</div><div>[ 8280.189260] Call Trace:</div><div>[ 8280.189265] [<ffffffff96713f79>] schedule+0x29/0x70</div><div>[ 8280.189300] [<ffffffffc04a0388>] _xfs_log_force_lsn+0x2e8/0x340 [xfs]</div><div>[ 8280.189305] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20</div><div>[ 8280.189333] [<ffffffffc0480b97>] xfs_file_fsync+0x107/0x1e0 [xfs]</div><div>[ 8280.189340] [<ffffffff9624f0e7>] do_fsync+0x67/0xb0</div><div>[ 8280.189345] [<ffffffff9672076f>] ? system_call_after_swapgs+0xbc/0x160</div><div>[ 8280.189348] [<ffffffff9624f3d0>] SyS_fsync+0x10/0x20</div><div>[ 8280.189352] [<ffffffff9672082f>] system_call_fastpath+0x1c/0x21</div><div>[ 8280.189356] [<ffffffff9672077b>] ? system_call_after_swapgs+0xc8/0x160</div><div>[ 8280.189360] INFO: task glusteriotwr2:766 blocked for more than 120 seconds.</div><div>[ 8280.189404] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.</div><div>[ 8280.189453] glusteriotwr2 D ffff931cfa510000 0 766 1 0x00000080</div><div>[ 8280.189457] Call Trace:</div><div>[ 8280.189476] [<ffffffffc01a3839>] ? __split_and_process_bio+0x2e9/0x520 [dm_mod]</div><div>[ 8280.189480] [<ffffffff96713f79>] schedule+0x29/0x70</div><div>[ 8280.189484] [<ffffffff967118e9>] schedule_timeout+0x239/0x2c0</div><div>[ 8280.189494] [<ffffffffc01a3d98>] ? dm_make_request+0x128/0x1a0 [dm_mod]</div><div>[ 8280.189498] [<ffffffff9671348d>] io_schedule_timeout+0xad/0x130</div><div>[ 8280.189502] [<ffffffff967145ad>] wait_for_completion_io+0xfd/0x140</div><div>[ 8280.189507] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20</div><div>[ 8280.189513] [<ffffffff9631e574>] blkdev_issue_flush+0xb4/0x110</div><div>[ 8280.189546] [<ffffffffc04984b9>] xfs_blkdev_issue_flush+0x19/0x20 [xfs]</div><div>[ 8280.189588] [<ffffffffc0480c40>] xfs_file_fsync+0x1b0/0x1e0 [xfs]</div><div>[ 8280.189593] [<ffffffff9624f0e7>] do_fsync+0x67/0xb0</div><div>[ 8280.189597] [<ffffffff9672076f>] ? system_call_after_swapgs+0xbc/0x160</div><div>[ 8280.189600] [<ffffffff9624f3d0>] SyS_fsync+0x10/0x20</div><div>[ 8280.189604] [<ffffffff9672082f>] system_call_fastpath+0x1c/0x21</div><div>[ 8280.189608] [<ffffffff9672077b>] ? system_call_after_swapgs+0xc8/0x160</div><div>[ 8400.186024] INFO: task xfsaild/dm-10:1061 blocked for more than 120 seconds.</div><div>[ 8400.186077] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.</div><div>[ 8400.186127] xfsaild/dm-10 D ffff93203a2eeeb0 0 1061 2 0x00000000</div><div>[ 8400.186133] Call Trace:</div><div>[ 8400.186146] [<ffffffff960a3a2e>] ? try_to_del_timer_sync+0x5e/0x90</div><div>[ 8400.186153] [<ffffffff96713f79>] schedule+0x29/0x70</div><div>[ 8400.186221] [<ffffffffc049fe36>] _xfs_log_force+0x1c6/0x2c0 [xfs]</div><div>[ 8400.186227] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20</div><div>[ 8400.186260] [<ffffffffc04abfec>] ? xfsaild+0x16c/0x6f0 [xfs]</div><div>[ 8400.186292] [<ffffffffc049ff5c>] xfs_log_force+0x2c/0x70 [xfs]</div><div>[ 8400.186324] [<ffffffffc04abe80>] ? xfs_trans_ail_cursor_first+0x90/0x90 [xfs]</div><div>[ 8400.186356] [<ffffffffc04abfec>] xfsaild+0x16c/0x6f0 [xfs]</div><div>[ 8400.186388] [<ffffffffc04abe80>] ? xfs_trans_ail_cursor_first+0x90/0x90 [xfs]</div><div>[ 8400.186394] [<ffffffff960bb161>] kthread+0xd1/0xe0</div><div>[ 8400.186398] [<ffffffff960bb090>] ? insert_kthread_work+0x40/0x40</div><div>[ 8400.186405] [<ffffffff96720677>] ret_from_fork_nospec_begin+0x21/0x21</div><div>[ 8400.186409] [<ffffffff960bb090>] ? insert_kthread_work+0x40/0x40</div><div>[ 8400.186450] INFO: task glusterclogfsyn:6421 blocked for more than 120 seconds.</div><div>[ 8400.186496] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.</div><div>[ 8400.186545] glusterclogfsyn D ffff93203a2edee0 0 6421 1 0x00000080</div><div>[ 8400.186549] Call Trace:</div><div>[ 8400.186554] [<ffffffff96713f79>] schedule+0x29/0x70</div><div>[ 8400.186589] [<ffffffffc04a0388>] _xfs_log_force_lsn+0x2e8/0x340 [xfs]</div><div>[ 8400.186593] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20</div><div>[ 8400.186622] [<ffffffffc0480b97>] xfs_file_fsync+0x107/0x1e0 [xfs]</div><div>[ 8400.186629] [<ffffffff9624f0e7>] do_fsync+0x67/0xb0</div><div>[ 8400.186634] [<ffffffff9672076f>] ? system_call_after_swapgs+0xbc/0x160</div><div>[ 8400.186637] [<ffffffff9624f3d0>] SyS_fsync+0x10/0x20</div><div>[ 8400.186641] [<ffffffff9672082f>] system_call_fastpath+0x1c/0x21</div><div>[ 8400.186645] [<ffffffff9672077b>] ? system_call_after_swapgs+0xc8/0x160</div><div>[ 8400.186649] INFO: task glusteriotwr2:766 blocked for more than 120 seconds.</div><div>[ 8400.186693] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.</div><div>[ 8400.186741] glusteriotwr2 D ffff931cfa510000 0 766 1 0x00000080</div><div>[ 8400.186746] Call Trace:</div><div>[ 8400.186764] [<ffffffffc01a3839>] ? __split_and_process_bio+0x2e9/0x520 [dm_mod]</div><div>[ 8400.186768] [<ffffffff96713f79>] schedule+0x29/0x70</div><div>[ 8400.186772] [<ffffffff967118e9>] schedule_timeout+0x239/0x2c0</div><div>[ 8400.186782] [<ffffffffc01a3d98>] ? dm_make_request+0x128/0x1a0 [dm_mod]</div><div>[ 8400.186786] [<ffffffff9671348d>] io_schedule_timeout+0xad/0x130</div><div>[ 8400.186790] [<ffffffff967145ad>] wait_for_completion_io+0xfd/0x140</div><div>[ 8400.186795] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20</div><div>[ 8400.186800] [<ffffffff9631e574>] blkdev_issue_flush+0xb4/0x110</div><div>[ 8400.186833] [<ffffffffc04984b9>] xfs_blkdev_issue_flush+0x19/0x20 [xfs]</div><div>[ 8400.186862] [<ffffffffc0480c40>] xfs_file_fsync+0x1b0/0x1e0 [xfs]</div><div>[ 8400.186879] [<ffffffff9624f0e7>] do_fsync+0x67/0xb0</div><div>[ 8400.186884] [<ffffffff9672076f>] ? system_call_after_swapgs+0xbc/0x160</div><div>[ 8400.186887] [<ffffffff9624f3d0>] SyS_fsync+0x10/0x20</div><div>[ 8400.186891] [<ffffffff9672082f>] system_call_fastpath+0x1c/0x21</div><div>[ 8400.186895] [<ffffffff9672077b>] ? system_call_after_swapgs+0xc8/0x160</div><div>[ 8400.186912] INFO: task kworker/3:4:3191 blocked for more than 120 seconds.</div><div>[ 8400.186957] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.</div><div>[ 8400.187006] kworker/3:4 D ffff931faf598fd0 0 3191 2 0x00000080</div><div>[ 8400.187041] Workqueue: xfs-sync/dm-10 xfs_log_worker [xfs]</div><div>[ 8400.187043] Call Trace:</div><div>[ 8400.187050] [<ffffffff9614e45f>] ? delayacct_end+0x8f/0xb0</div><div>[ 8400.187055] [<ffffffff960dbbc8>] ? update_group_power+0x28/0x280</div><div>[ 8400.187059] [<ffffffff96713f79>] schedule+0x29/0x70</div><div>[ 8400.187062] [<ffffffff967118e9>] schedule_timeout+0x239/0x2c0</div><div>[ 8400.187066] [<ffffffff9671432d>] wait_for_completion+0xfd/0x140</div><div>[ 8400.187071] [<ffffffff960cf1b0>] ? wake_up_state+0x20/0x20</div><div>[ 8400.187075] [<ffffffff960b418d>] flush_work+0xfd/0x190</div><div>[ 8400.187079] [<ffffffff960b06e0>] ? move_linked_works+0x90/0x90</div><div>[ 8400.187110] [<ffffffffc04a1d8a>] xlog_cil_force_lsn+0x8a/0x210 [xfs]</div><div>[ 8400.187142] [<ffffffffc049fcf5>] _xfs_log_force+0x85/0x2c0 [xfs]</div><div>[ 8400.187174] [<ffffffffc049ffd6>] ? xfs_log_worker+0x36/0x100 [xfs]</div><div>[ 8400.187206] [<ffffffffc049ff5c>] xfs_log_force+0x2c/0x70 [xfs]</div><div>[ 8400.187237] [<ffffffffc049ffd6>] xfs_log_worker+0x36/0x100 [xfs]</div><div>[ 8400.187241] [<ffffffff960b312f>] process_one_work+0x17f/0x440</div><div>[ 8400.187245] [<ffffffff960b3df6>] worker_thread+0x126/0x3c0</div><div>[ 8400.187249] [<ffffffff960b3cd0>] ? manage_workers.isra.24+0x2a0/0x2a0</div><div>[ 8400.187253] [<ffffffff960bb161>] kthread+0xd1/0xe0</div><div>[ 8400.187257] [<ffffffff960bb090>] ? insert_kthread_work+0x40/0x40</div><div>[ 8400.187261] [<ffffffff96720677>] ret_from_fork_nospec_begin+0x21/0x21</div><div>[ 8400.187265] [<ffffffff960bb090>] ? insert_kthread_work+0x40/0x40</div><div>[13493.643624] perf: interrupt took too long (12026 > 11991), lowering kernel.perf_event_max_sample_rate to 16000</div></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, May 30, 2018 at 2:44 AM, Krutika Dhananjay <span dir="ltr"><<a href="mailto:kdhananj@redhat.com" target="_blank">kdhananj@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>The profile seems to suggest very high latencies on the brick at <span class="m_8325978663967049795gmail-im">ovirt1.nwfiber.com:/gluster/br<wbr>ick1/engine<br></span></div><div>ovirt2.* shows decent numbers. Is everything OK with the brick on ovirt1?</div><div>Are the bricks of engine volume on both these servers identical in terms of their config?</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>-Krutika<br></div><div><span class="m_8325978663967049795gmail-im"></span></div><br></font></span></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Wed, May 30, 2018 at 3:07 PM, Jim Kusznir <span dir="ltr"><<a href="mailto:jim@palousetech.com" target="_blank">jim@palousetech.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi:<div><br></div><div>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:</div><div><br></div><div><div>Brick: ovirt1.nwfiber.com:/gluster/br<wbr>ick1/engine</div><div>------------------------------<wbr>------------------</div><div>Cumulative Stats:</div><div> Block Size: 256b+ 512b+ 4096b+ </div><div> No. of Reads: 702 24 772 </div><div>No. of Writes: 0 939 4802 </div><div> </div><div> Block Size: 8192b+ 16384b+ 32768b+ </div><div> No. of Reads: 0 51 49 </div><div>No. of Writes: 4211 858 291 </div><div> </div><div> Block Size: 65536b+ 131072b+ </div><div> No. of Reads: 49 5232 </div><div>No. of Writes: 333 588 </div><span><div> %-latency Avg-latency Min-Latency Max-Latency No. of calls Fop</div><div> --------- ----------- ----------- ----------- ------------ ----</div></span><div> 0.00 0.00 us 0.00 us 0.00 us 3 FORGET</div><div> 0.00 0.00 us 0.00 us 0.00 us 1227 RELEASE</div><div> 0.00 0.00 us 0.00 us 0.00 us 1035 RELEASEDIR</div><div> 0.00 827.00 us 619.00 us 1199.00 us 10 READDIRP</div><div> 0.00 98.38 us 30.00 us 535.00 us 144 ENTRYLK</div><div> 0.00 180.11 us 121.00 us 257.00 us 94 REMOVEXATTR</div><div> 0.00 208.03 us 23.00 us 1980.00 us 182 GETXATTR</div><div> 0.00 1212.71 us 35.00 us 29459.00 us 38 READDIR</div><div> 0.01 260.39 us 172.00 us 552.00 us 376 XATTROP</div><div> 0.01 305.10 us 45.00 us 144983.00 us 727 STATFS</div><div> 0.03 1267.23 us 22.00 us 418399.00 us 451 FLUSH</div><div> 0.04 1164.14 us 86.00 us 437638.00 us 600 OPEN</div><div> 0.07 2253.75 us 3.00 us 645037.00 us 598 OPENDIR</div><div> 0.08 17360.97 us 149.00 us 962156.00 us 94 SETATTR</div><div> 0.12 2733.36 us 50.00 us 1683945.00 us 877 FSTAT</div><div> 0.21 3041.55 us 29.00 us 1021732.00 us 1368 INODELK</div><div> 0.24 389.93 us 107.00 us 550203.00 us 11840 FXATTROP</div><div> 0.34 14820.49 us 38.00 us 1935527.00 us 444 STAT</div><div> 0.88 3765.77 us 42.00 us 1341978.00 us 4581 LOOKUP</div><div> 15.06 19624.04 us 26.00 us 6412511.00 us 14971 FINODELK</div><div> 21.63 59817.26 us 45.00 us 4008832.00 us 7054 FSYNC</div><div> 23.19 263941.14 us 86.00 us 4130892.00 us 1714 READ</div><div> 38.10 125578.64 us 207.00 us 7682338.00 us 5919 WRITE</div><div> </div><div> Duration: 6957 seconds</div><div> Data Read: 694832857 bytes</div><div>Data Written: 192751104 bytes</div><div> </div><div>Interval 0 Stats:</div><div> Block Size: 256b+ 512b+ 4096b+ </div><div> No. of Reads: 702 24 772 </div><div>No. of Writes: 0 939 4802 </div><div> </div><div> Block Size: 8192b+ 16384b+ 32768b+ </div><div> No. of Reads: 0 51 49 </div><div>No. of Writes: 4211 858 291 </div><div> </div><div> Block Size: 65536b+ 131072b+ </div><div> No. of Reads: 49 5232 </div><div>No. of Writes: 333 588 </div><span><div> %-latency Avg-latency Min-Latency Max-Latency No. of calls Fop</div><div> --------- ----------- ----------- ----------- ------------ ----</div></span><div> 0.00 0.00 us 0.00 us 0.00 us 3 FORGET</div><div> 0.00 0.00 us 0.00 us 0.00 us 1227 RELEASE</div><div> 0.00 0.00 us 0.00 us 0.00 us 1035 RELEASEDIR</div><div> 0.00 827.00 us 619.00 us 1199.00 us 10 READDIRP</div><div> 0.00 98.38 us 30.00 us 535.00 us 144 ENTRYLK</div><div> 0.00 180.11 us 121.00 us 257.00 us 94 REMOVEXATTR</div><div> 0.00 208.03 us 23.00 us 1980.00 us 182 GETXATTR</div><div> 0.00 1212.71 us 35.00 us 29459.00 us 38 READDIR</div><div> 0.01 260.39 us 172.00 us 552.00 us 376 XATTROP</div><div> 0.01 305.10 us 45.00 us 144983.00 us 727 STATFS</div><div> 0.03 1267.23 us 22.00 us 418399.00 us 451 FLUSH</div><div> 0.04 1164.14 us 86.00 us 437638.00 us 600 OPEN</div><div> 0.07 2253.75 us 3.00 us 645037.00 us 598 OPENDIR</div><div> 0.08 17360.97 us 149.00 us 962156.00 us 94 SETATTR</div><div> 0.12 2733.36 us 50.00 us 1683945.00 us 877 FSTAT</div><div> 0.21 3041.55 us 29.00 us 1021732.00 us 1368 INODELK</div><div> 0.24 389.93 us 107.00 us 550203.00 us 11840 FXATTROP</div><div> 0.34 14820.49 us 38.00 us 1935527.00 us 444 STAT</div><div> 0.91 3859.75 us 42.00 us 1341978.00 us 4581 LOOKUP</div><div> 15.05 19622.80 us 26.00 us 6412511.00 us 14971 FINODELK</div><div> 21.62 59809.04 us 45.00 us 4008832.00 us 7054 FSYNC</div><div> 23.18 263941.14 us 86.00 us 4130892.00 us 1714 READ</div><div> 38.09 125562.74 us 207.00 us 7682338.00 us 5919 WRITE</div><div> </div><div> Duration: 6957 seconds</div><div> Data Read: 694832857 bytes</div><div>Data Written: 192751104 bytes</div><div> </div><div>Brick: ovirt2.nwfiber.com:/gluster/br<wbr>ick1/engine</div><div>------------------------------<wbr>------------------</div><span><div>Cumulative Stats:</div><div> Block Size: 256b+ 512b+ 1024b+ </div></span><div> No. of Reads: 704 167 216 </div><div>No. of Writes: 0 939 0 </div><span><div> </div><div> Block Size: 2048b+ 4096b+ 8192b+ </div></span><div> No. of Reads: 424 34918 9866 </div><div>No. of Writes: 0 4802 4211 </div><span><div> </div><div> Block Size: 16384b+ 32768b+ 65536b+ </div></span><div> No. of Reads: 12695 3290 3880 </div><div>No. of Writes: 858 291 333 </div><div> </div><div> Block Size: 131072b+ </div><div> No. of Reads: 13718 </div><div>No. of Writes: 596 </div><span><div> %-latency Avg-latency Min-Latency Max-Latency No. of calls Fop</div><div> --------- ----------- ----------- ----------- ------------ ----</div></span><div> 0.00 0.00 us 0.00 us 0.00 us 3 FORGET</div><div> 0.00 0.00 us 0.00 us 0.00 us 1228 RELEASE</div><div> 0.00 0.00 us 0.00 us 0.00 us 1041 RELEASEDIR</div><div> 0.06 74.26 us 21.00 us 915.00 us 144 ENTRYLK</div><div> 0.07 141.97 us 87.00 us 268.00 us 94 REMOVEXATTR</div><div> 0.08 370.68 us 22.00 us 1311.00 us 38 READDIR</div><div> 0.09 184.88 us 108.00 us 316.00 us 94 SETATTR</div><div> 0.14 56.41 us 21.00 us 540.00 us 451 FLUSH</div><div> 0.14 139.42 us 18.00 us 3251.00 us 184 GETXATTR</div><div> 0.31 96.06 us 2.00 us 2293.00 us 598 OPENDIR</div><div> 0.35 88.76 us 31.00 us 716.00 us 727 STATFS</div><div> 0.43 131.96 us 59.00 us 784.00 us 600 OPEN</div><div> 0.44 214.77 us 110.00 us 851.00 us 376 XATTROP</div><div> 0.44 81.02 us 21.00 us 3029.00 us 998 STAT</div><div> 0.51 68.57 us 17.00 us 3039.00 us 1368 INODELK</div><div> 1.26 429.06 us 274.00 us 988.00 us 539 READDIRP</div><div> 1.89 109.48 us 38.00 us 2492.00 us 3175 FSTAT</div><div> 5.09 62.48 us 19.00 us 4578.00 us 14967 FINODELK</div><div> 5.72 229.43 us 32.00 us 979.00 us 4581 LOOKUP</div><div> 11.48 356.40 us 144.00 us 16222.00 us 5917 WRITE</div><div> 12.40 192.55 us 87.00 us 4372.00 us 11834 FXATTROP</div><div> 12.48 325.11 us 33.00 us 10702.00 us 7051 FSYNC</div><div> 46.61 2063.11 us 131.00 us 193833.00 us 4151 READ</div><div> </div><div> Duration: 6958 seconds</div><div> Data Read: 2782908225 bytes</div><div>Data Written: 193799680 bytes</div><span><div> </div><div>Interval 0 Stats:</div><div> Block Size: 256b+ 512b+ 1024b+ </div></span><div> No. of Reads: 704 167 216 </div><div>No. of Writes: 0 939 0 </div><span><div> </div><div> Block Size: 2048b+ 4096b+ 8192b+ </div></span><div> No. of Reads: 424 34918 9866 </div><div>No. of Writes: 0 4802 4211 </div><span><div> </div><div> Block Size: 16384b+ 32768b+ 65536b+ </div></span><div> No. of Reads: 12695 3290 3880 </div><div>No. of Writes: 858 291 333 </div><div> </div><div> Block Size: 131072b+ </div><div> No. of Reads: 13718 </div><div>No. of Writes: 596 </div><span><div> %-latency Avg-latency Min-Latency Max-Latency No. of calls Fop</div><div> --------- ----------- ----------- ----------- ------------ ----</div></span><div> 0.00 0.00 us 0.00 us 0.00 us 3 FORGET</div><div> 0.00 0.00 us 0.00 us 0.00 us 1228 RELEASE</div><div> 0.00 0.00 us 0.00 us 0.00 us 1041 RELEASEDIR</div><div> 0.06 74.26 us 21.00 us 915.00 us 144 ENTRYLK</div><div> 0.07 141.97 us 87.00 us 268.00 us 94 REMOVEXATTR</div><div> 0.08 370.68 us 22.00 us 1311.00 us 38 READDIR</div><div> 0.09 184.88 us 108.00 us 316.00 us 94 SETATTR</div><div> 0.14 56.41 us 21.00 us 540.00 us 451 FLUSH</div><div> 0.14 139.42 us 18.00 us 3251.00 us 184 GETXATTR</div><div> 0.31 96.06 us 2.00 us 2293.00 us 598 OPENDIR</div><div> 0.35 88.76 us 31.00 us 716.00 us 727 STATFS</div><div> 0.43 131.96 us 59.00 us 784.00 us 600 OPEN</div><div> 0.44 214.77 us 110.00 us 851.00 us 376 XATTROP</div><div> 0.44 81.02 us 21.00 us 3029.00 us 998 STAT</div><div> 0.51 68.57 us 17.00 us 3039.00 us 1368 INODELK</div><div> 1.26 429.06 us 274.00 us 988.00 us 539 READDIRP</div><div> 1.89 109.51 us 38.00 us 2492.00 us 3175 FSTAT</div><div> 5.09 62.48 us 19.00 us 4578.00 us 14967 FINODELK</div><div> 5.72 229.43 us 32.00 us 979.00 us 4581 LOOKUP</div><div> 11.48 356.40 us 144.00 us 16222.00 us 5917 WRITE</div><div> 12.40 192.55 us 87.00 us 4372.00 us 11834 FXATTROP</div><div> 12.48 325.11 us 33.00 us 10702.00 us 7051 FSYNC</div><div> 46.62 2063.91 us 131.00 us 193833.00 us 4151 READ</div><div> </div><div> Duration: 6958 seconds</div><div> Data Read: 2782908225 bytes</div><div>Data Written: 193799680 bytes</div><div> </div></div><div><br></div><div><br></div><div><div>gluster> volume info engine</div><span><div> </div><div>Volume Name: engine</div><div>Type: Replicate</div><div>Volume ID: 87ad86b9-d88b-457e-ba21-5d3173<wbr>c612de</div><div>Status: Started</div><div>Snapshot Count: 0</div><div>Number of Bricks: 1 x (2 + 1) = 3</div><div>Transport-type: tcp</div><div>Bricks:</div><div>Brick1: ovirt1.nwfiber.com:/gluster/br<wbr>ick1/engine</div><div>Brick2: ovirt2.nwfiber.com:/gluster/br<wbr>ick1/engine</div><div>Brick3: ovirt3.nwfiber.com:/gluster/br<wbr>ick1/engine (arbiter)</div><div>Options Reconfigured:</div></span><div>diagnostics.count-fop-hits: on</div><div>diagnostics.latency-measuremen<wbr>t: on</div><span><div>performance.strict-o-direct: on</div><div>nfs.disable: on</div><div>user.cifs: off</div><div>network.ping-timeout: 30</div><div>cluster.shd-max-threads: 6</div><div>cluster.shd-wait-qlength: 10000</div><div>cluster.locking-scheme: granular</div><div>cluster.data-self-heal-algorit<wbr>hm: full</div><div>performance.low-prio-threads: 32</div><div>features.shard-block-size: 512MB</div><div>features.shard: on</div><div>storage.owner-gid: 36</div><div>storage.owner-uid: 36</div><div>cluster.server-quorum-type: server</div><div>cluster.quorum-type: auto</div><div>network.remote-dio: off</div></span><div>cluster.eager-lock: off</div><span><div>performance.stat-prefetch: off</div><div>performance.io-cache: off</div><div>performance.read-ahead: off</div><div>performance.quick-read: off</div><div>performance.readdir-ahead: on</div></span><div>geo-replication.indexing: on</div><div>geo-replication.ignore-pid-che<wbr>ck: on</div><div>changelog.changelog: on</div></div><div><br></div></div><div class="m_8325978663967049795HOEnZb"><div class="m_8325978663967049795h5"><div class="gmail_extra"><br><div class="gmail_quote">On Tue, May 29, 2018 at 9:17 PM, Krutika Dhananjay <span dir="ltr"><<a href="mailto:kdhananj@redhat.com" target="_blank">kdhananj@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Adding Ravi to look into the heal issue.</div><div><br></div><div>As for the fsync hang and subsequent IO errors, it seems a lot like <a href="https://bugzilla.redhat.com/show_bug.cgi?id=1497156" target="_blank">https://bugzilla.redhat.com/sh<wbr>ow_bug.cgi?id=1497156</a> and Paolo Bonzini from qemu had pointed out that this would be fixed by the following commit:</div><div><br></div><div><pre class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262gmail-bz_comment_text m_8325978663967049795m_-6646859184097749740m_-4054420348781964262gmail-bz_wrap_comment_text" id="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262gmail-comment_text_20"> commit e72c9a2a67a6400c8ef3d01d4c461d<wbr>bbbfa0e1f0
Author: Paolo Bonzini <<a href="mailto:pbonzini@redhat.com" target="_blank">pbonzini@redhat.com</a>>
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 <<a href="mailto:dougmill@linux.vnet.ibm.com" target="_blank">dougmill@linux.vnet.ibm.com</a>>
Cc: "James E.J. Bottomley" <<a href="mailto:jejb@linux.vnet.ibm.com" target="_blank">jejb@linux.vnet.ibm.com</a>>
Cc: "Martin K. Petersen" <<a href="mailto:martin.petersen@oracle.com" target="_blank">martin.petersen@oracle.com</a>>
Cc: Hannes Reinecke <<a href="mailto:hare@suse.de" target="_blank">hare@suse.de</a>>
Cc: <a href="mailto:linux-scsi@vger.kernel.org" target="_blank">linux-scsi@vger.kernel.org</a>
Cc: <a href="mailto:stable@vger.kernel.org" target="_blank">stable@vger.kernel.org</a>
Signed-off-by: Paolo Bonzini <<a href="mailto:pbonzini@redhat.com" target="_blank">pbonzini@redhat.com</a>>
Signed-off-by: Martin K. Petersen <<a href="mailto:martin.petersen@oracle.com" target="_blank">martin.petersen@oracle.com</a>></pre></div><div><br></div><div>Adding Paolo/Kevin to comment.</div><div><br></div><div>As for the poor gluster performance, could you disable cluster.eager-lock and see if that makes any difference:</div><div><br></div><div># gluster volume set <VOL> cluster.eager-lock off</div><div><br></div><div>Do also capture the volume profile again if you still see performance issues after disabling eager-lock.<br></div><div><br></div><div>-Krutika</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="m_8325978663967049795m_-6646859184097749740h5">On Wed, May 30, 2018 at 6:55 AM, Jim Kusznir <span dir="ltr"><<a href="mailto:jim@palousetech.com" target="_blank">jim@palousetech.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="m_8325978663967049795m_-6646859184097749740h5"><div dir="ltr">I also finally found the following in my system log on one server:<div><br></div><div><div>[10679.524491] INFO: task glusterclogro:14933 blocked for more than 120 seconds.</div><div>[10679.525826] "echo 0 > /proc/sys/kernel/hung_task_tim<wbr>eout_secs" disables this message.</div><div>[10679.527144] glusterclogro D ffff97209832bf40 0 14933 1 0x00000080</div><div>[10679.527150] Call Trace:</div><div>[10679.527161] [<ffffffffb9913f79>] schedule+0x29/0x70</div><div>[10679.527218] [<ffffffffc060e388>] _xfs_log_force_lsn+0x2e8/0x340 [xfs]</div><div>[10679.527225] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20</div><div>[10679.527254] [<ffffffffc05eeb97>] xfs_file_fsync+0x107/0x1e0 [xfs]</div><div>[10679.527260] [<ffffffffb944f0e7>] do_fsync+0x67/0xb0</div><div>[10679.527268] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/<wbr>0x160</div><div>[10679.527271] [<ffffffffb944f3d0>] SyS_fsync+0x10/0x20</div><div>[10679.527275] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21</div><div>[10679.527279] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/<wbr>0x160</div><div>[10679.527283] INFO: task glusterposixfsy:14941 blocked for more than 120 seconds.</div><div>[10679.528608] "echo 0 > /proc/sys/kernel/hung_task_tim<wbr>eout_secs" disables this message.</div><div>[10679.529956] glusterposixfsy D ffff972495f84f10 0 14941 1 0x00000080</div><div>[10679.529961] Call Trace:</div><div>[10679.529966] [<ffffffffb9913f79>] schedule+0x29/0x70</div><div>[10679.530003] [<ffffffffc060e388>] _xfs_log_force_lsn+0x2e8/0x340 [xfs]</div><div>[10679.530008] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20</div><div>[10679.530038] [<ffffffffc05eeb97>] xfs_file_fsync+0x107/0x1e0 [xfs]</div><div>[10679.530042] [<ffffffffb944f0e7>] do_fsync+0x67/0xb0</div><div>[10679.530046] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/<wbr>0x160</div><div>[10679.530050] [<ffffffffb944f3f3>] SyS_fdatasync+0x13/0x20</div><div>[10679.530054] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21</div><div>[10679.530058] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/<wbr>0x160</div><div>[10679.530062] INFO: task glusteriotwr13:15486 blocked for more than 120 seconds.</div><div>[10679.531805] "echo 0 > /proc/sys/kernel/hung_task_tim<wbr>eout_secs" disables this message.</div><div>[10679.533732] glusteriotwr13 D ffff9720a83f0000 0 15486 1 0x00000080</div><div>[10679.533738] Call Trace:</div><div>[10679.533747] [<ffffffffb9913f79>] schedule+0x29/0x70</div><div>[10679.533799] [<ffffffffc060e388>] _xfs_log_force_lsn+0x2e8/0x340 [xfs]</div><div>[10679.533806] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20</div><div>[10679.533846] [<ffffffffc05eeb97>] xfs_file_fsync+0x107/0x1e0 [xfs]</div><div>[10679.533852] [<ffffffffb944f0e7>] do_fsync+0x67/0xb0</div><div>[10679.533858] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/<wbr>0x160</div><div>[10679.533863] [<ffffffffb944f3f3>] SyS_fdatasync+0x13/0x20</div><div>[10679.533868] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21</div><div>[10679.533873] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/<wbr>0x160</div><div>[10919.512757] INFO: task glusterclogro:14933 blocked for more than 120 seconds.</div><div>[10919.514714] "echo 0 > /proc/sys/kernel/hung_task_tim<wbr>eout_secs" disables this message.</div><div>[10919.516663] glusterclogro D ffff97209832bf40 0 14933 1 0x00000080</div><div>[10919.516677] Call Trace:</div><div>[10919.516690] [<ffffffffb9913f79>] schedule+0x29/0x70</div><div>[10919.516696] [<ffffffffb99118e9>] schedule_timeout+0x239/0x2c0</div><div>[10919.516703] [<ffffffffb951cc04>] ? blk_finish_plug+0x14/0x40</div><div>[10919.516768] [<ffffffffc05e9224>] ? _xfs_buf_ioapply+0x334/0x460 [xfs]</div><div>[10919.516774] [<ffffffffb991432d>] wait_for_completion+0xfd/0x140</div><div>[10919.516782] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20</div><div>[10919.516821] [<ffffffffc05eb0a3>] ? _xfs_buf_read+0x23/0x40 [xfs]</div><div>[10919.516859] [<ffffffffc05eafa9>] xfs_buf_submit_wait+0xf9/0x1d0 [xfs]</div><div>[10919.516902] [<ffffffffc061b279>] ? xfs_trans_read_buf_map+0x199/0<wbr>x400 [xfs]</div><div>[10919.516940] [<ffffffffc05eb0a3>] _xfs_buf_read+0x23/0x40 [xfs]</div><div>[10919.516977] [<ffffffffc05eb1b9>] xfs_buf_read_map+0xf9/0x160 [xfs]</div><div>[10919.517022] [<ffffffffc061b279>] xfs_trans_read_buf_map+0x199/0<wbr>x400 [xfs]</div><div>[10919.517057] [<ffffffffc05c8d04>] xfs_da_read_buf+0xd4/0x100 [xfs]</div><div>[10919.517091] [<ffffffffc05c8d53>] xfs_da3_node_read+0x23/0xd0 [xfs]</div><div>[10919.517126] [<ffffffffc05c9fee>] xfs_da3_node_lookup_int+0x6e/0<wbr>x2f0 [xfs]</div><div>[10919.517160] [<ffffffffc05d5a1d>] xfs_dir2_node_lookup+0x4d/0x17<wbr>0 [xfs]</div><div>[10919.517194] [<ffffffffc05ccf5d>] xfs_dir_lookup+0x1bd/0x1e0 [xfs]</div><div>[10919.517233] [<ffffffffc05fd8d9>] xfs_lookup+0x69/0x140 [xfs]</div><div>[10919.517271] [<ffffffffc05fa018>] xfs_vn_lookup+0x78/0xc0 [xfs]</div><div>[10919.517278] [<ffffffffb9425cf3>] lookup_real+0x23/0x60</div><div>[10919.517283] [<ffffffffb9426702>] __lookup_hash+0x42/0x60</div><div>[10919.517288] [<ffffffffb942d519>] SYSC_renameat2+0x3a9/0x5a0</div><div>[10919.517296] [<ffffffffb94d3753>] ? selinux_file_free_security+0x2<wbr>3/0x30</div><div>[10919.517304] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/<wbr>0x160</div><div>[10919.517309] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/<wbr>0x160</div><div>[10919.517313] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/<wbr>0x160</div><div>[10919.517318] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/<wbr>0x160</div><div>[10919.517323] [<ffffffffb942e58e>] SyS_renameat2+0xe/0x10</div><div>[10919.517328] [<ffffffffb942e5ce>] SyS_rename+0x1e/0x20</div><div>[10919.517333] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21</div><div>[10919.517339] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/<wbr>0x160</div><div>[11159.496095] INFO: task glusteriotwr9:15482 blocked for more than 120 seconds.</div><div>[11159.497546] "echo 0 > /proc/sys/kernel/hung_task_tim<wbr>eout_secs" disables this message.</div><div>[11159.498978] glusteriotwr9 D ffff971fa0fa1fa0 0 15482 1 0x00000080</div><div>[11159.498984] Call Trace:</div><div>[11159.498995] [<ffffffffb9911f00>] ? bit_wait+0x50/0x50</div><div>[11159.498999] [<ffffffffb9913f79>] schedule+0x29/0x70</div><div>[11159.499003] [<ffffffffb99118e9>] schedule_timeout+0x239/0x2c0</div><div>[11159.499056] [<ffffffffc05dd9b7>] ? xfs_iext_bno_to_ext+0xa7/0x1a0 [xfs]</div><div>[11159.499082] [<ffffffffc05dd43e>] ? xfs_iext_bno_to_irec+0x8e/0xd0 [xfs]</div><div>[11159.499090] [<ffffffffb92f7a12>] ? ktime_get_ts64+0x52/0xf0</div><div>[11159.499093] [<ffffffffb9911f00>] ? bit_wait+0x50/0x50</div><div>[11159.499097] [<ffffffffb991348d>] io_schedule_timeout+0xad/0x130</div><div>[11159.499101] [<ffffffffb9913528>] io_schedule+0x18/0x20</div><div>[11159.499104] [<ffffffffb9911f11>] bit_wait_io+0x11/0x50</div><div>[11159.499107] [<ffffffffb9911ac1>] __wait_on_bit_lock+0x61/0xc0</div><div>[11159.499113] [<ffffffffb9393634>] __lock_page+0x74/0x90</div><div>[11159.499118] [<ffffffffb92bc210>] ? wake_bit_function+0x40/0x40</div><div>[11159.499121] [<ffffffffb9394154>] __find_lock_page+0x54/0x70</div><div>[11159.499125] [<ffffffffb9394e85>] grab_cache_page_write_begin+0x<wbr>55/0xc0</div><div>[11159.499130] [<ffffffffb9484b76>] iomap_write_begin+0x66/0x100</div><div>[11159.499135] [<ffffffffb9484edf>] iomap_write_actor+0xcf/0x1d0</div><div>[11159.499140] [<ffffffffb9484e10>] ? iomap_write_end+0x80/0x80</div><div>[11159.499144] [<ffffffffb94854e7>] iomap_apply+0xb7/0x150</div><div>[11159.499149] [<ffffffffb9485621>] iomap_file_buffered_write+0xa1<wbr>/0xe0</div><div>[11159.499153] [<ffffffffb9484e10>] ? iomap_write_end+0x80/0x80</div><div>[11159.499182] [<ffffffffc05f025d>] xfs_file_buffered_aio_write+0x<wbr>12d/0x2c0 [xfs]</div><div>[11159.499213] [<ffffffffc05f057d>] xfs_file_aio_write+0x18d/0x1b0 [xfs]</div><div>[11159.499217] [<ffffffffb941a533>] do_sync_write+0x93/0xe0</div><div>[11159.499222] [<ffffffffb941b010>] vfs_write+0xc0/0x1f0</div><div>[11159.499225] [<ffffffffb941c002>] SyS_pwrite64+0x92/0xc0</div><div>[11159.499230] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/<wbr>0x160</div><div>[11159.499234] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21</div><div>[11159.499238] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/<wbr>0x160</div><div>[11279.488720] INFO: task xfsaild/dm-10:1134 blocked for more than 120 seconds.</div><div>[11279.490197] "echo 0 > /proc/sys/kernel/hung_task_tim<wbr>eout_secs" disables this message.</div><div>[11279.491665] xfsaild/dm-10 D ffff9720a8660fd0 0 1134 2 0x00000000</div><div>[11279.491671] Call Trace:</div><div>[11279.491682] [<ffffffffb92a3a2e>] ? try_to_del_timer_sync+0x5e/0x9<wbr>0</div><div>[11279.491688] [<ffffffffb9913f79>] schedule+0x29/0x70</div><div>[11279.491744] [<ffffffffc060de36>] _xfs_log_force+0x1c6/0x2c0 [xfs]</div><div>[11279.491750] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20</div><div>[11279.491783] [<ffffffffc0619fec>] ? xfsaild+0x16c/0x6f0 [xfs]</div><div>[11279.491817] [<ffffffffc060df5c>] xfs_log_force+0x2c/0x70 [xfs]</div><div>[11279.491849] [<ffffffffc0619e80>] ? xfs_trans_ail_cursor_first+0x9<wbr>0/0x90 [xfs]</div><div>[11279.491880] [<ffffffffc0619fec>] xfsaild+0x16c/0x6f0 [xfs]</div><div>[11279.491913] [<ffffffffc0619e80>] ? xfs_trans_ail_cursor_first+0x9<wbr>0/0x90 [xfs]</div><div>[11279.491919] [<ffffffffb92bb161>] kthread+0xd1/0xe0</div><div>[11279.491926] [<ffffffffb92bb090>] ? insert_kthread_work+0x40/0x40</div><div>[11279.491932] [<ffffffffb9920677>] ret_from_fork_nospec_begin+0x2<wbr>1/0x21</div><div>[11279.491936] [<ffffffffb92bb090>] ? insert_kthread_work+0x40/0x40</div><div>[11279.491976] INFO: task glusterclogfsyn:14934 blocked for more than 120 seconds.</div><div>[11279.493466] "echo 0 > /proc/sys/kernel/hung_task_tim<wbr>eout_secs" disables this message.</div><div>[11279.494952] glusterclogfsyn D ffff97209832af70 0 14934 1 0x00000080</div><div>[11279.494957] Call Trace:</div><div>[11279.494979] [<ffffffffc0309839>] ? __split_and_process_bio+0x2e9/<wbr>0x520 [dm_mod]</div><div>[11279.494983] [<ffffffffb9913f79>] schedule+0x29/0x70</div><div>[11279.494987] [<ffffffffb99118e9>] schedule_timeout+0x239/0x2c0</div><div>[11279.494997] [<ffffffffc0309d98>] ? dm_make_request+0x128/0x1a0 [dm_mod]</div><div>[11279.495001] [<ffffffffb991348d>] io_schedule_timeout+0xad/0x130</div><div>[11279.495005] [<ffffffffb99145ad>] wait_for_completion_io+0xfd/0x<wbr>140</div><div>[11279.495010] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20</div><div>[11279.495016] [<ffffffffb951e574>] blkdev_issue_flush+0xb4/0x110</div><div>[11279.495049] [<ffffffffc06064b9>] xfs_blkdev_issue_flush+0x19/0x<wbr>20 [xfs]</div><div>[11279.495079] [<ffffffffc05eec40>] xfs_file_fsync+0x1b0/0x1e0 [xfs]</div><div>[11279.495086] [<ffffffffb944f0e7>] do_fsync+0x67/0xb0</div><div>[11279.495090] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/<wbr>0x160</div><div>[11279.495094] [<ffffffffb944f3d0>] SyS_fsync+0x10/0x20</div><div>[11279.495098] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21</div><div>[11279.495102] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/<wbr>0x160</div><div>[11279.495105] INFO: task glusterposixfsy:14941 blocked for more than 120 seconds.</div><div>[11279.496606] "echo 0 > /proc/sys/kernel/hung_task_tim<wbr>eout_secs" disables this message.</div><div>[11279.498114] glusterposixfsy D ffff972495f84f10 0 14941 1 0x00000080</div><div>[11279.498118] Call Trace:</div><div>[11279.498134] [<ffffffffc0309839>] ? __split_and_process_bio+0x2e9/<wbr>0x520 [dm_mod]</div><div>[11279.498138] [<ffffffffb9913f79>] schedule+0x29/0x70</div><div>[11279.498142] [<ffffffffb99118e9>] schedule_timeout+0x239/0x2c0</div><div>[11279.498152] [<ffffffffc0309d98>] ? dm_make_request+0x128/0x1a0 [dm_mod]</div><div>[11279.498156] [<ffffffffb991348d>] io_schedule_timeout+0xad/0x130</div><div>[11279.498160] [<ffffffffb99145ad>] wait_for_completion_io+0xfd/0x<wbr>140</div><div>[11279.498165] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20</div><div>[11279.498169] [<ffffffffb951e574>] blkdev_issue_flush+0xb4/0x110</div><div>[11279.498202] [<ffffffffc06064b9>] xfs_blkdev_issue_flush+0x19/0x<wbr>20 [xfs]</div><div>[11279.498231] [<ffffffffc05eec40>] xfs_file_fsync+0x1b0/0x1e0 [xfs]</div><div>[11279.498238] [<ffffffffb944f0e7>] do_fsync+0x67/0xb0</div><div>[11279.498242] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/<wbr>0x160</div><div>[11279.498246] [<ffffffffb944f3f3>] SyS_fdatasync+0x13/0x20</div><div>[11279.498250] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21</div><div>[11279.498254] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/<wbr>0x160</div><div>[11279.498257] INFO: task glusteriotwr1:14950 blocked for more than 120 seconds.</div><div>[11279.499789] "echo 0 > /proc/sys/kernel/hung_task_tim<wbr>eout_secs" disables this message.</div><div>[11279.501343] glusteriotwr1 D ffff97208b6daf70 0 14950 1 0x00000080</div><div>[11279.501348] Call Trace:</div><div>[11279.501353] [<ffffffffb9913f79>] schedule+0x29/0x70</div><div>[11279.501390] [<ffffffffc060e388>] _xfs_log_force_lsn+0x2e8/0x340 [xfs]</div><div>[11279.501396] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20</div><div>[11279.501428] [<ffffffffc05eeb97>] xfs_file_fsync+0x107/0x1e0 [xfs]</div><div>[11279.501432] [<ffffffffb944ef3f>] generic_write_sync+0x4f/0x70</div><div>[11279.501461] [<ffffffffc05f0545>] xfs_file_aio_write+0x155/0x1b0 [xfs]</div><div>[11279.501466] [<ffffffffb941a533>] do_sync_write+0x93/0xe0</div><div>[11279.501471] [<ffffffffb941b010>] vfs_write+0xc0/0x1f0</div><div>[11279.501475] [<ffffffffb941c002>] SyS_pwrite64+0x92/0xc0</div><div>[11279.501479] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/<wbr>0x160</div><div>[11279.501483] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21</div><div>[11279.501489] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/<wbr>0x160</div><div>[11279.501493] INFO: task glusteriotwr4:14953 blocked for more than 120 seconds.</div><div>[11279.503047] "echo 0 > /proc/sys/kernel/hung_task_tim<wbr>eout_secs" disables this message.</div><div>[11279.504630] glusteriotwr4 D ffff972499f2bf40 0 14953 1 0x00000080</div><div>[11279.504635] Call Trace:</div><div>[11279.504640] [<ffffffffb9913f79>] schedule+0x29/0x70</div><div>[11279.504676] [<ffffffffc060e388>] _xfs_log_force_lsn+0x2e8/0x340 [xfs]</div><div>[11279.504681] [<ffffffffb92cf1b0>] ? wake_up_state+0x20/0x20</div><div>[11279.504710] [<ffffffffc05eeb97>] xfs_file_fsync+0x107/0x1e0 [xfs]</div><div>[11279.504714] [<ffffffffb944f0e7>] do_fsync+0x67/0xb0</div><div>[11279.504718] [<ffffffffb992076f>] ? system_call_after_swapgs+0xbc/<wbr>0x160</div><div>[11279.504722] [<ffffffffb944f3d0>] SyS_fsync+0x10/0x20</div><div>[11279.504725] [<ffffffffb992082f>] system_call_fastpath+0x1c/0x21</div><div>[11279.504730] [<ffffffffb992077b>] ? system_call_after_swapgs+0xc8/<wbr>0x160</div><div>[12127.466494] perf: interrupt took too long (8263 > 8150), lowering kernel.perf_event_max_sample_r<wbr>ate to 24000</div></div><div><br></div><div>--------------------</div><div>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....</div><div><br></div><div>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?</div><span class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262HOEnZb"><font color="#888888"><div><br></div><div>--Jim</div></font></span></div><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262HOEnZb"><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262h5"><div class="gmail_extra"><br><div class="gmail_quote">On Tue, May 29, 2018 at 3:01 PM, Jim Kusznir <span dir="ltr"><<a href="mailto:jim@palousetech.com" target="_blank">jim@palousetech.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">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:<div><br></div><div><div>[root@ovirt2 yum.repos.d]# gluster volume profile data info</div><div>Brick: ovirt2.nwfiber.com:/gluster/br<wbr>ick2/data</div><div>------------------------------<wbr>----------------</div><div>Cumulative Stats:</div><div> Block Size: 256b+ 512b+ 1024b+ </div><div> No. of Reads: 983 2696 1059 </div><div>No. of Writes: 0 1113 302 </div><div> </div><div> Block Size: 2048b+ 4096b+ 8192b+ </div><div> No. of Reads: 852 88608 53526 </div><div>No. of Writes: 522 812340 76257 </div><div> </div><div> Block Size: 16384b+ 32768b+ 65536b+ </div><div> No. of Reads: 54351 241901 15024 </div><div>No. of Writes: 21636 8656 8976 </div><div> </div><div> Block Size: 131072b+ </div><div> No. of Reads: 524156 </div><div>No. of Writes: 296071 </div><div> %-latency Avg-latency Min-Latency Max-Latency No. of calls Fop</div><div> --------- ----------- ----------- ----------- ------------ ----</div><div> 0.00 0.00 us 0.00 us 0.00 us 4189 RELEASE</div><div> 0.00 0.00 us 0.00 us 0.00 us 1257 RELEASEDIR</div><div> 0.00 46.19 us 12.00 us 187.00 us 69 FLUSH</div><div> 0.00 147.00 us 78.00 us 367.00 us 86 REMOVEXATTR</div><div> 0.00 223.46 us 24.00 us 1166.00 us 149 READDIR</div><div> 0.00 565.34 us 76.00 us 3639.00 us 88 FTRUNCATE</div><div> 0.00 263.28 us 20.00 us 28385.00 us 228 LK</div><div> 0.00 98.84 us 2.00 us 880.00 us 1198 OPENDIR</div><div> 0.00 91.59 us 26.00 us 10371.00 us 3853 STATFS</div><div> 0.00 494.14 us 17.00 us 193439.00 us 1171 GETXATTR</div><div> 0.00 299.42 us 35.00 us 9799.00 us 2044 READDIRP</div><div> 0.00 1965.31 us 110.00 us 382258.00 us 321 XATTROP</div><div> 0.01 113.40 us 24.00 us 61061.00 us 8134 STAT</div><div> 0.01 755.38 us 57.00 us 607603.00 us 3196 DISCARD</div><div> 0.05 2690.09 us 58.00 us 2704761.00 us 3206 OPEN</div><div> 0.10 119978.25 us 97.00 us 9406684.00 us 154 SETATTR</div><div> 0.18 101.73 us 28.00 us 700477.00 us 313379 FSTAT</div><div> 0.23 1059.84 us 25.00 us 2716124.00 us 38255 LOOKUP</div><div> 0.47 1024.11 us 54.00 us 6197164.00 us 81455 FXATTROP</div><div> 1.72 2984.00 us 15.00 us 37098954.00 us 103020 FINODELK</div><div> 5.92 44315.32 us 51.00 us 24731536.00 us 23957 FSYNC</div><div> 13.27 2399.78 us 25.00 us 22089540.00 us 991005 READ</div><div> 37.00 5980.43 us 52.00 us 22099889.00 us 1108976 WRITE</div><div> 41.04 5452.75 us 13.00 us 22102452.00 us 1349053 INODELK</div><div> </div><div> Duration: 10026 seconds</div><div> Data Read: 80046027759 bytes</div><div>Data Written: 44496632320 bytes</div><div> </div><div>Interval 1 Stats:</div><div> Block Size: 256b+ 512b+ 1024b+ </div><div> No. of Reads: 983 2696 1059 </div><div>No. of Writes: 0 838 185 </div><div> </div><div> Block Size: 2048b+ 4096b+ 8192b+ </div><div> No. of Reads: 852 85856 51575 </div><div>No. of Writes: 382 705802 57812 </div><div> </div><div> Block Size: 16384b+ 32768b+ 65536b+ </div><div> No. of Reads: 52673 232093 14984 </div><div>No. of Writes: 13499 4908 4242 </div><div> </div><div> Block Size: 131072b+ </div><div> No. of Reads: 460040 </div><div>No. of Writes: 6411 </div><div> %-latency Avg-latency Min-Latency Max-Latency No. of calls Fop</div><div> --------- ----------- ----------- ----------- ------------ ----</div><div> 0.00 0.00 us 0.00 us 0.00 us 2093 RELEASE</div><div> 0.00 0.00 us 0.00 us 0.00 us 1093 RELEASEDIR</div><div> 0.00 53.38 us 26.00 us 111.00 us 16 FLUSH</div><div> 0.00 145.14 us 78.00 us 367.00 us 71 REMOVEXATTR</div><div> 0.00 190.96 us 114.00 us 298.00 us 71 SETATTR</div><div> 0.00 213.38 us 24.00 us 1145.00 us 90 READDIR</div><div> 0.00 263.28 us 20.00 us 28385.00 us 228 LK</div><div> 0.00 101.76 us 2.00 us 880.00 us 1093 OPENDIR</div><div> 0.01 93.60 us 27.00 us 10371.00 us 3090 STATFS</div><div> 0.02 537.47 us 17.00 us 193439.00 us 1038 GETXATTR</div><div> 0.03 297.44 us 35.00 us 9799.00 us 1990 READDIRP</div><div> 0.03 2357.28 us 110.00 us 382258.00 us 253 XATTROP</div><div> 0.04 385.93 us 58.00 us 47593.00 us 2091 OPEN</div><div> 0.04 114.86 us 24.00 us 61061.00 us 7715 STAT</div><div> 0.06 444.59 us 57.00 us 333240.00 us 3053 DISCARD</div><div> 0.42 316.24 us 25.00 us 290728.00 us 29823 LOOKUP</div><div> 0.73 257.92 us 54.00 us 344812.00 us 63296 FXATTROP</div><div> 1.37 98.30 us 28.00 us 67621.00 us 313172 FSTAT</div><div> 1.58 2124.69 us 51.00 us 849200.00 us 16717 FSYNC</div><div> 5.73 162.46 us 52.00 us 748492.00 us 794079 WRITE</div><div> 7.19 2065.17 us 16.00 us 37098954.00 us 78381 FINODELK</div><div> 36.44 886.32 us 25.00 us 2216436.00 us 925421 READ</div><div> 46.30 1178.04 us 13.00 us 1700704.00 us 884635 INODELK</div><div> </div><div> Duration: 7485 seconds</div><div> Data Read: 71250527215 bytes</div><div>Data Written: 5119903744 bytes</div><div> </div><div>Brick: ovirt3.nwfiber.com:/gluster/br<wbr>ick2/data</div><div>------------------------------<wbr>----------------</div><div>Cumulative Stats:</div><div> Block Size: 1b+ </div><div> No. of Reads: 0 </div><div>No. of Writes: 3264419 </div><div> %-latency Avg-latency Min-Latency Max-Latency No. of calls Fop</div><div> --------- ----------- ----------- ----------- ------------ ----</div><div> 0.00 0.00 us 0.00 us 0.00 us 90 FORGET</div><div> 0.00 0.00 us 0.00 us 0.00 us 9462 RELEASE</div><div> 0.00 0.00 us 0.00 us 0.00 us 4254 RELEASEDIR</div><div> 0.00 50.52 us 13.00 us 190.00 us 71 FLUSH</div><div> 0.00 186.97 us 87.00 us 713.00 us 86 REMOVEXATTR</div><div> 0.00 79.32 us 33.00 us 189.00 us 228 LK</div><div> 0.00 220.98 us 129.00 us 513.00 us 86 SETATTR</div><div> 0.01 259.30 us 26.00 us 2632.00 us 137 READDIR</div><div> 0.02 322.76 us 145.00 us 2125.00 us 321 XATTROP</div><div> 0.03 109.55 us 2.00 us 1258.00 us 1193 OPENDIR</div><div> 0.05 70.21 us 21.00 us 431.00 us 3196 DISCARD</div><div> 0.05 169.26 us 21.00 us 2315.00 us 1545 GETXATTR</div><div> 0.12 176.85 us 63.00 us 2844.00 us 3206 OPEN</div><div> 0.61 303.49 us 90.00 us 3085.00 us 9633 FSTAT</div><div> 2.44 305.66 us 28.00 us 3716.00 us 38230 LOOKUP</div><div> 4.52 266.22 us 55.00 us 53424.00 us 81455 FXATTROP</div><div> 6.96 1397.99 us 51.00 us 64822.00 us 23889 FSYNC</div><div> 16.48 84.74 us 25.00 us 6917.00 us 932592 WRITE</div><div> 30.16 106.90 us 13.00 us 3920189.00 us 1353046 INODELK</div><div> 38.55 1794.52 us 14.00 us 16210553.00 us 103039 FINODELK</div><div> </div><div> Duration: 66562 seconds</div><div> Data Read: 0 bytes</div><div>Data Written: 3264419 bytes</div><div> </div><div>Interval 1 Stats:</div><div> Block Size: 1b+ </div><div> No. of Reads: 0 </div><div>No. of Writes: 794080 </div><div> %-latency Avg-latency Min-Latency Max-Latency No. of calls Fop</div><div> --------- ----------- ----------- ----------- ------------ ----</div><div> 0.00 0.00 us 0.00 us 0.00 us 2093 RELEASE</div><div> 0.00 0.00 us 0.00 us 0.00 us 1093 RELEASEDIR</div><div> 0.00 70.31 us 26.00 us 125.00 us 16 FLUSH</div><div> 0.00 193.10 us 103.00 us 713.00 us 71 REMOVEXATTR</div><div> 0.01 227.32 us 133.00 us 513.00 us 71 SETATTR</div><div> 0.01 79.32 us 33.00 us 189.00 us 228 LK</div><div> 0.01 259.83 us 35.00 us 1138.00 us 89 READDIR</div><div> 0.03 318.26 us 145.00 us 2047.00 us 253 XATTROP</div><div> 0.04 112.67 us 3.00 us 1258.00 us 1093 OPENDIR</div><div> 0.06 167.98 us 23.00 us 1951.00 us 1014 GETXATTR</div><div> 0.08 70.97 us 22.00 us 431.00 us 3053 DISCARD</div><div> 0.13 183.78 us 66.00 us 2844.00 us 2091 OPEN</div><div> 1.01 303.82 us 90.00 us 3085.00 us 9610 FSTAT</div><div> 3.27 316.59 us 30.00 us 3716.00 us 29820 LOOKUP</div><div> 5.83 265.79 us 59.00 us 53424.00 us 63296 FXATTROP</div><div> 7.95 1373.89 us 51.00 us 64822.00 us 16717 FSYNC</div><div> 23.17 851.99 us 14.00 us 16210553.00 us 78555 FINODELK</div><div> 24.04 87.44 us 27.00 us 6917.00 us 794081 WRITE</div><div> 34.36 111.91 us 14.00 us 984871.00 us 886790 INODELK</div><div> </div><div> Duration: 7485 seconds</div><div> Data Read: 0 bytes</div><div>Data Written: 794080 bytes</div></div><div><br></div><div><br></div><div>-----------------------</div><div>Here is the data from the volume that is backed by the SHDDs and has one failed disk:</div><div><div>[root@ovirt2 yum.repos.d]# gluster volume profile data-hdd info</div><div>Brick: 172.172.1.12:/gluster/brick3/d<wbr>ata-hdd</div><div>------------------------------<wbr>--------------</div><div>Cumulative Stats:</div><div> Block Size: 256b+ 512b+ 1024b+ </div><div> No. of Reads: 1702 86 16 </div><div>No. of Writes: 0 767 71 </div><div> </div><div> Block Size: 2048b+ 4096b+ 8192b+ </div><div> No. of Reads: 19 51841 2049 </div><div>No. of Writes: 76 60668 35727 </div><div> </div><div> Block Size: 16384b+ 32768b+ 65536b+ </div><div> No. of Reads: 1744 639 1088 </div><div>No. of Writes: 8524 2410 1285 </div><div> </div><div> Block Size: 131072b+ </div><div> No. of Reads: 771999 </div><div>No. of Writes: 29584 </div><div> %-latency Avg-latency Min-Latency Max-Latency No. of calls Fop</div><div> --------- ----------- ----------- ----------- ------------ ----</div><div> 0.00 0.00 us 0.00 us 0.00 us 2902 RELEASE</div><div> 0.00 0.00 us 0.00 us 0.00 us 1517 RELEASEDIR</div><div> 0.00 197.00 us 197.00 us 197.00 us 1 FTRUNCATE</div><div> 0.00 70.24 us 16.00 us 758.00 us 51 FLUSH</div><div> 0.00 143.93 us 82.00 us 305.00 us 57 REMOVEXATTR</div><div> 0.00 178.63 us 105.00 us 712.00 us 60 SETATTR</div><div> 0.00 67.30 us 19.00 us 572.00 us 555 LK</div><div> 0.00 322.80 us 23.00 us 4673.00 us 138 READDIR</div><div> 0.00 336.56 us 106.00 us 11994.00 us 237 XATTROP</div><div> 0.00 84.70 us 28.00 us 1071.00 us 3469 STATFS</div><div> 0.01 387.75 us 2.00 us 146017.00 us 1467 OPENDIR</div><div> 0.01 148.59 us 21.00 us 64374.00 us 4454 STAT</div><div> 0.02 783.02 us 16.00 us 93502.00 us 1902 GETXATTR</div><div> 0.03 1516.10 us 17.00 us 210690.00 us 1364 ENTRYLK</div><div> 0.03 2555.47 us 300.00 us 674454.00 us 1064 READDIRP</div><div> 0.07 85.74 us 19.00 us 68340.00 us 62849 FSTAT</div><div> 0.07 1978.12 us 59.00 us 202596.00 us 2729 OPEN</div><div> 0.22 708.57 us 15.00 us 394799.00 us 25447 LOOKUP</div><div> 5.94 2331.74 us 15.00 us 1099530.00 us 207534 FINODELK</div><div> 7.31 8311.75 us 58.00 us 1800216.00 us 71668 FXATTROP</div><div> 12.49 7735.19 us 51.00 us 3595513.00 us 131642 WRITE</div><div> 17.70 957.08 us 16.00 us 13700466.00 us 1508160 INODELK</div><div> 24.55 2546.43 us 26.00 us 5077347.00 us 786060 READ</div><div> 31.56 49699.15 us 47.00 us 3746331.00 us 51777 FSYNC</div><div> </div><div> Duration: 10101 seconds</div><div> Data Read: 101562897361 bytes</div><div>Data Written: 4834450432 bytes</div><div> </div><div>Interval 0 Stats:</div><div> Block Size: 256b+ 512b+ 1024b+ </div><div> No. of Reads: 1702 86 16 </div><div>No. of Writes: 0 767 71 </div><div> </div><div> Block Size: 2048b+ 4096b+ 8192b+ </div><div> No. of Reads: 19 51841 2049 </div><div>No. of Writes: 76 60668 35727 </div><div> </div><div> Block Size: 16384b+ 32768b+ 65536b+ </div><div> No. of Reads: 1744 639 1088 </div><div>No. of Writes: 8524 2410 1285 </div><div> </div><div> Block Size: 131072b+ </div><div> No. of Reads: 771999 </div><div>No. of Writes: 29584 </div><div> %-latency Avg-latency Min-Latency Max-Latency No. of calls Fop</div><div> --------- ----------- ----------- ----------- ------------ ----</div><div> 0.00 0.00 us 0.00 us 0.00 us 2902 RELEASE</div><div> 0.00 0.00 us 0.00 us 0.00 us 1517 RELEASEDIR</div><div> 0.00 197.00 us 197.00 us 197.00 us 1 FTRUNCATE</div><div> 0.00 70.24 us 16.00 us 758.00 us 51 FLUSH</div><div> 0.00 143.93 us 82.00 us 305.00 us 57 REMOVEXATTR</div><div> 0.00 178.63 us 105.00 us 712.00 us 60 SETATTR</div><div> 0.00 67.30 us 19.00 us 572.00 us 555 LK</div><div> 0.00 322.80 us 23.00 us 4673.00 us 138 READDIR</div><div> 0.00 336.56 us 106.00 us 11994.00 us 237 XATTROP</div><div> 0.00 84.70 us 28.00 us 1071.00 us 3469 STATFS</div><div> 0.01 387.75 us 2.00 us 146017.00 us 1467 OPENDIR</div><div> 0.01 148.59 us 21.00 us 64374.00 us 4454 STAT</div><div> 0.02 783.02 us 16.00 us 93502.00 us 1902 GETXATTR</div><div> 0.03 1516.10 us 17.00 us 210690.00 us 1364 ENTRYLK</div><div> 0.03 2555.47 us 300.00 us 674454.00 us 1064 READDIRP</div><div> 0.07 85.73 us 19.00 us 68340.00 us 62849 FSTAT</div><div> 0.07 1978.12 us 59.00 us 202596.00 us 2729 OPEN</div><div> 0.22 708.57 us 15.00 us 394799.00 us 25447 LOOKUP</div><div> 5.94 2334.57 us 15.00 us 1099530.00 us 207534 FINODELK</div><div> 7.31 8311.49 us 58.00 us 1800216.00 us 71668 FXATTROP</div><div> 12.49 7735.32 us 51.00 us 3595513.00 us 131642 WRITE</div><div> 17.71 957.08 us 16.00 us 13700466.00 us 1508160 INODELK</div><div> 24.56 2546.42 us 26.00 us 5077347.00 us 786060 READ</div><div> 31.54 49651.63 us 47.00 us 3746331.00 us 51777 FSYNC</div><div> </div><div> Duration: 10101 seconds</div><div> Data Read: 101562897361 bytes</div><div>Data Written: 4834450432 bytes</div></div><div><br></div></div><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276HOEnZb"><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276h5"><div class="gmail_extra"><br><div class="gmail_quote">On Tue, May 29, 2018 at 2:55 PM, Jim Kusznir <span dir="ltr"><<a href="mailto:jim@palousetech.com" target="_blank">jim@palousetech.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Thank you for your response.<div><br></div><div>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.</div><div><br></div><div>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).</div><div><br></div><div>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.</div><div><br></div><div>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.</div><div><br></div><div>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.</div><div><br></div><div>Am I correct in believing that once the failed disk was brought offline that performance should return to normal?</div></div><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930HOEnZb"><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930h5"><div class="gmail_extra"><br><div class="gmail_quote">On Tue, May 29, 2018 at 1:27 PM, Alex K <span dir="ltr"><<a href="mailto:rightkicktech@gmail.com" target="_blank">rightkicktech@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">I would check disks status and accessibility of mount points where your gluster volumes reside.</div><br><div class="gmail_quote"><div><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930m_-4909453786756208844h5"><div dir="ltr">On Tue, May 29, 2018, 22:28 Jim Kusznir <<a href="mailto:jim@palousetech.com" target="_blank">jim@palousetech.com</a>> wrote:<br></div></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930m_-4909453786756208844h5"><div dir="ltr">On one ovirt server, I'm now seeing these messages:<div><div>[56474.239725] blk_update_request: 63 callbacks suppressed</div><div>[56474.239732] blk_update_request: I/O error, dev dm-2, sector 0</div><div>[56474.240602] blk_update_request: I/O error, dev dm-2, sector 3905945472</div><div>[56474.241346] blk_update_request: I/O error, dev dm-2, sector 3905945584</div><div>[56474.242236] blk_update_request: I/O error, dev dm-2, sector 2048</div><div>[56474.243072] blk_update_request: I/O error, dev dm-2, sector 3905943424</div><div>[56474.243997] blk_update_request: I/O error, dev dm-2, sector 3905943536</div><div>[56474.247347] blk_update_request: I/O error, dev dm-2, sector 0</div><div>[56474.248315] blk_update_request: I/O error, dev dm-2, sector 3905945472</div><div>[56474.249231] blk_update_request: I/O error, dev dm-2, sector 3905945584</div><div>[56474.250221] blk_update_request: I/O error, dev dm-2, sector 2048</div></div><div><br></div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, May 29, 2018 at 11:59 AM, Jim Kusznir <span dir="ltr"><<a href="mailto:jim@palousetech.com" rel="noreferrer" target="_blank">jim@palousetech.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I see in messages on ovirt3 (my 3rd machine, the one upgraded to 4.2):<div><br></div><div><div>May 29 11:54:41 ovirt3 ovs-vsctl: ovs|00001|db_ctl_base|ERR|unix<wbr>:/var/run/openvswitch/db.sock: database connection failed (No such file or directory)</div><div>May 29 11:54:51 ovirt3 ovs-vsctl: ovs|00001|db_ctl_base|ERR|unix<wbr>:/var/run/openvswitch/db.sock: database connection failed (No such file or directory)</div><div>May 29 11:55:01 ovirt3 ovs-vsctl: ovs|00001|db_ctl_base|ERR|unix<wbr>:/var/run/openvswitch/db.sock: database connection failed (No such file or directory)</div></div><div>(appears a lot).</div><div><br></div><div>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.</div><div><br></div><div>Gluster generates a bunch of different log files, I don't know what ones you want, or from which machine(s).</div><div><br></div><div>How do I do "volume profiling"?</div><div><br></div><div>Thanks!</div></div><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930m_-4909453786756208844m_-1594786904780884718m_492621309039667928HOEnZb"><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930m_-4909453786756208844m_-1594786904780884718m_492621309039667928h5"><div class="gmail_extra"><br><div class="gmail_quote">On Tue, May 29, 2018 at 11:53 AM, Sahina Bose <span dir="ltr"><<a href="mailto:sabose@redhat.com" rel="noreferrer" target="_blank">sabose@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Do you see errors reported in the mount logs for the volume? If so, could you attach the logs?<br></div>Any issues with your underlying disks. Can you also attach output of volume profiling?<br></div><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930m_-4909453786756208844m_-1594786904780884718m_492621309039667928m_-6088757787094439702HOEnZb"><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930m_-4909453786756208844m_-1594786904780884718m_492621309039667928m_-6088757787094439702h5"><div class="gmail_extra"><br><div class="gmail_quote">On Wed, May 30, 2018 at 12:13 AM, Jim Kusznir <span dir="ltr"><<a href="mailto:jim@palousetech.com" rel="noreferrer" target="_blank">jim@palousetech.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">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.<div><br></div><div>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...</div><div><br></div><div>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?</div><div><br></div><div>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.</div><span class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930m_-4909453786756208844m_-1594786904780884718m_492621309039667928m_-6088757787094439702m_1448879657997877339HOEnZb"><font color="#888888"><div><br></div><div>--Jim</div></font></span></div><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930m_-4909453786756208844m_-1594786904780884718m_492621309039667928m_-6088757787094439702m_1448879657997877339HOEnZb"><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930m_-4909453786756208844m_-1594786904780884718m_492621309039667928m_-6088757787094439702m_1448879657997877339h5"><div class="gmail_extra"><br><div class="gmail_quote">On Mon, May 28, 2018 at 10:50 PM, Sahina Bose <span dir="ltr"><<a href="mailto:sabose@redhat.com" rel="noreferrer" target="_blank">sabose@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">[Adding gluster-users to look at the heal issue]<br></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930m_-4909453786756208844m_-1594786904780884718m_492621309039667928m_-6088757787094439702m_1448879657997877339m_2506865858631215125h5">On Tue, May 29, 2018 at 9:17 AM, Jim Kusznir <span dir="ltr"><<a href="mailto:jim@palousetech.com" rel="noreferrer" target="_blank">jim@palousetech.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930m_-4909453786756208844m_-1594786904780884718m_492621309039667928m_-6088757787094439702m_1448879657997877339m_2506865858631215125h5"><div dir="ltr">Hello:<div><br></div><div>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.</div><div><br></div><div>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:</div><div><br></div><div><div>[root@ovirt3 ~]# gluster volume heal data-hdd info</div><div>Brick 172.172.1.11:/gluster/brick3/d<wbr>ata-hdd</div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/48d7ecb8-7ac5-4<wbr>725-bca5-b3519681cf2f/0d6080b0<wbr>-7018-4fa3-bb82-1dd9ef07d9b9 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/647be733-f153-4<wbr>cdc-85bd-ba72544c2631/b453a300<wbr>-0602-4be1-8310-8bd5abe00971 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/6da854d1-b6be-4<wbr>46b-9bf0-90a0dbbea830/3c93bd1f<wbr>-b7fa-4aa2-b445-6904e31839ba </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/7f647567-d18c-4<wbr>4f1-a58e-9b8865833acb/f9364470<wbr>-9770-4bb1-a6b9-a54861849625 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/f3c8e7aa-6ef2-4<wbr>2a7-93d4-e0a4df6dd2fa/2eb0b1ad<wbr>-2606-44ef-9cd3-ae59610a504b </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/b1ea3f62-0f05-4<wbr>ded-8c82-9c91c90e0b61/d5d6bf5a<wbr>-499f-431d-9013-5453db93ed32 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/8c8b5147-e9d6-4<wbr>810-b45b-185e3ed65727/16f08231<wbr>-93b0-489d-a2fd-687b6bf88eaa </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/12924435-b9c2-4<wbr>aab-ba19-1c1bc31310ef/07b3db69<wbr>-440e-491e-854c-bbfa18a7cff2 </div><div>Status: Connected</div><div>Number of entries: 8</div><div><br></div><div>Brick 172.172.1.12:/gluster/brick3/d<wbr>ata-hdd</div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/48d7ecb8-7ac5-4<wbr>725-bca5-b3519681cf2f/0d6080b0<wbr>-7018-4fa3-bb82-1dd9ef07d9b9 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/647be733-f153-4<wbr>cdc-85bd-ba72544c2631/b453a300<wbr>-0602-4be1-8310-8bd5abe00971 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/b1ea3f62-0f05-4<wbr>ded-8c82-9c91c90e0b61/d5d6bf5a<wbr>-499f-431d-9013-5453db93ed32 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/6da854d1-b6be-4<wbr>46b-9bf0-90a0dbbea830/3c93bd1f<wbr>-b7fa-4aa2-b445-6904e31839ba </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/7f647567-d18c-4<wbr>4f1-a58e-9b8865833acb/f9364470<wbr>-9770-4bb1-a6b9-a54861849625 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/8c8b5147-e9d6-4<wbr>810-b45b-185e3ed65727/16f08231<wbr>-93b0-489d-a2fd-687b6bf88eaa </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/12924435-b9c2-4<wbr>aab-ba19-1c1bc31310ef/07b3db69<wbr>-440e-491e-854c-bbfa18a7cff2 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/f3c8e7aa-6ef2-4<wbr>2a7-93d4-e0a4df6dd2fa/2eb0b1ad<wbr>-2606-44ef-9cd3-ae59610a504b </div><div>Status: Connected</div><div>Number of entries: 8</div><div><br></div><div>Brick 172.172.1.13:/gluster/brick3/d<wbr>ata-hdd</div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/b1ea3f62-0f05-4<wbr>ded-8c82-9c91c90e0b61/d5d6bf5a<wbr>-499f-431d-9013-5453db93ed32 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/8c8b5147-e9d6-4<wbr>810-b45b-185e3ed65727/16f08231<wbr>-93b0-489d-a2fd-687b6bf88eaa </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/12924435-b9c2-4<wbr>aab-ba19-1c1bc31310ef/07b3db69<wbr>-440e-491e-854c-bbfa18a7cff2 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/f3c8e7aa-6ef2-4<wbr>2a7-93d4-e0a4df6dd2fa/2eb0b1ad<wbr>-2606-44ef-9cd3-ae59610a504b </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/647be733-f153-4<wbr>cdc-85bd-ba72544c2631/b453a300<wbr>-0602-4be1-8310-8bd5abe00971 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/48d7ecb8-7ac5-4<wbr>725-bca5-b3519681cf2f/0d6080b0<wbr>-7018-4fa3-bb82-1dd9ef07d9b9 </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/6da854d1-b6be-4<wbr>46b-9bf0-90a0dbbea830/3c93bd1f<wbr>-b7fa-4aa2-b445-6904e31839ba </div><div>/cc65f671-3377-494a-a7d4-1d9f7<wbr>c3ae46c/images/7f647567-d18c-4<wbr>4f1-a58e-9b8865833acb/f9364470<wbr>-9770-4bb1-a6b9-a54861849625 </div><div>Status: Connected</div><div>Number of entries: 8</div></div><div><br></div><div>---------</div><div>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.</div><div><br></div><div>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.</div><div><br></div><div>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?</div><div><br></div><div>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:</div><div><div>Message from syslogd@unifi at May 28 20:39:23 ...</div><div> kernel:[6171996.308904] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [mongod:14766]</div></div><div><br></div><div>(the process and PID are often different)</div><div><br></div><div>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...</div><div><br></div><div>Thanks!</div><span class="m_8325978663967049795m_-6646859184097749740m_-4054420348781964262m_-5992202424066002276m_1037085839393797930m_-4909453786756208844m_-1594786904780884718m_492621309039667928m_-6088757787094439702m_1448879657997877339m_2506865858631215125m_-3484925472286407273HOEnZb"><font color="#888888"><div>--Jim</div></font></span></div>
<br></div></div>______________________________<wbr>_________________<br>
Users mailing list -- <a href="mailto:users@ovirt.org" rel="noreferrer" target="_blank">users@ovirt.org</a><br>
To unsubscribe send an email to <a href="mailto:users-leave@ovirt.org" rel="noreferrer" target="_blank">users-leave@ovirt.org</a><br>
Privacy Statement: <a href="https://www.ovirt.org/site/privacy-policy/" rel="noreferrer noreferrer" target="_blank">https://www.ovirt.org/site/pri<wbr>vacy-policy/</a><br>
oVirt Code of Conduct: <a href="https://www.ovirt.org/community/about/community-guidelines/" rel="noreferrer noreferrer" target="_blank">https://www.ovirt.org/communit<wbr>y/about/community-guidelines/</a><br>
List Archives: <a href="https://lists.ovirt.org/archives/list/users@ovirt.org/message/3LEV6ZQ3JV2XLAL7NYBTXOYMYUOTIRQF/" rel="noreferrer noreferrer" target="_blank">https://lists.ovirt.org/archiv<wbr>es/list/users@ovirt.org/messag<wbr>e/3LEV6ZQ3JV2XLAL7NYBTXOYMYUOT<wbr>IRQF/</a><br>
<br></blockquote></div><br></div>
</blockquote></div><br></div>
</div></div></blockquote></div><br></div>
</div></div></blockquote></div><br></div>
</div></div></blockquote></div><br></div>
______________________________<wbr>_________________<br>
Users mailing list -- <a href="mailto:users@ovirt.org" rel="noreferrer" target="_blank">users@ovirt.org</a><br>
To unsubscribe send an email to <a href="mailto:users-leave@ovirt.org" rel="noreferrer" target="_blank">users-leave@ovirt.org</a><br>
Privacy Statement: <a href="https://www.ovirt.org/site/privacy-policy/" rel="noreferrer noreferrer" target="_blank">https://www.ovirt.org/site/pri<wbr>vacy-policy/</a><br>
oVirt Code of Conduct: <a href="https://www.ovirt.org/community/about/community-guidelines/" rel="noreferrer noreferrer" target="_blank">https://www.ovirt.org/communit<wbr>y/about/community-guidelines/</a><br></div></div>
List Archives: <a href="https://lists.ovirt.org/archives/list/users@ovirt.org/message/ACO7RFSLBSRBAIONIC2HQ6Z24ZDES5MF/" rel="noreferrer noreferrer" target="_blank">https://lists.ovirt.org/archiv<wbr>es/list/users@ovirt.org/messag<wbr>e/ACO7RFSLBSRBAIONIC2HQ6Z24ZDE<wbr>S5MF/</a><br>
</blockquote></div>
</blockquote></div><br></div>
</div></div></blockquote></div><br></div>
</div></div></blockquote></div><br></div>
</div></div><br>______________________________<wbr>_________________<br>
Users mailing list -- <a href="mailto:users@ovirt.org" target="_blank">users@ovirt.org</a><br>
To unsubscribe send an email to <a href="mailto:users-leave@ovirt.org" target="_blank">users-leave@ovirt.org</a><br>
Privacy Statement: <a href="https://www.ovirt.org/site/privacy-policy/" rel="noreferrer" target="_blank">https://www.ovirt.org/site/pri<wbr>vacy-policy/</a><br>
oVirt Code of Conduct: <a href="https://www.ovirt.org/community/about/community-guidelines/" rel="noreferrer" target="_blank">https://www.ovirt.org/communit<wbr>y/about/community-guidelines/</a><br></div></div>
List Archives: <a href="https://lists.ovirt.org/archives/list/users@ovirt.org/message/3DEQQLJM3WHQNZJ7KEMRZVFZ52MTIL74/" rel="noreferrer" target="_blank">https://lists.ovirt.org/archiv<wbr>es/list/users@ovirt.org/messag<wbr>e/3DEQQLJM3WHQNZJ7KEMRZVFZ52MT<wbr>IL74/</a><br>
<br></blockquote></div><br></div>
</blockquote></div><br></div>
</div></div></blockquote></div><br></div>
</div></div></blockquote></div><br></div>