https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-4072 Lustre <p>This issue was created by maloo for Nathaniel Clark &lt;nathaniel.l.clark@intel.com&gt;</p> <p>This issue relates to the following test suite run:<br/> <a href="http://maloo.whamcloud.com/test_sets/7592b12c-2ccc-11e3-bda0-52540035b04c" class="external-link" target="_blank" rel="nofollow noopener">http://maloo.whamcloud.com/test_sets/7592b12c-2ccc-11e3-bda0-52540035b04c</a></p> <p>The sub-test test_24v failed with the following error:</p> <blockquote> <p>test failed to respond and timed out</p></blockquote> <p>Info required for matching: sanity 24v</p> <p>This test will eventually complete but can take an inordinate amount of time.</p> LU-4072

sanity, subtest test_24v takes a VERY LONG TIME on ZFS

Bug Minor Resolved Fixed Nathaniel Clark Maloo performance revzfs zfs Mon, 7 Oct 2013 15:41:20 +0000 Sat, 11 Jan 2014 13:35:36 +0000 Mon, 4 Nov 2013 19:53:41 +0000 Lustre 2.5.0 Lustre 2.6.0 Lustre 2.5.1 0 5 <p>Running this test on my local setup of VMs, MDS is sitting in IOWait for 50% of CPU time. I think this issue may be similar to the ones experienced in <a href="https://jira.whamcloud.com/browse/LU-2887" title="sanity-quota test_12a: slow due to ZFS VMs sharing single disk" class="issue-link" data-issue-key="LU-2887"><del>LU-2887</del></a> during parallel-scale tests.</p> <p>Reduce number of files created in test by order of magnitude for ZFS<br/> <a href="http://review.whamcloud.com/7870" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/7870</a></p> <p>Running sanity/24v on local vm setup. On the MDS, the CPU was 50% iowait for the entire run of the test. System was only 3%.</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>== sanity test 24v: list directory with large files (handle hash collision, bug: 17560) == 12:24:25 (1381163065) - created 10000 (time 1381163076.08 total 10.52 last 10.52) - created 20000 (time 1381163092.21 total 26.65 last 16.13) - created 30000 (time 1381163957.78 total 892.22 last 865.57) - created 40000 (time 1381164943.50 total 1877.94 last 985.72) - created 50000 (time 1381166086.74 total 3021.18 last 1143.24) - created 60000 (time 1381167417.27 total 4351.71 last 1330.53) - created 70000 (time 1381168715.83 total 5650.27 last 1298.56) - created 80000 (time 1381169919.18 total 6853.63 last 1203.35) - created 90000 (time 1381171269.40 total 8203.85 last 1350.22) total: 100000 creates in 9826.93 seconds: 10.18 creates/second mdc.nlczfs1-MDT0000-mdc-ffff88003b3e3000.stats=clear Waiting for local destroys to complete Resetting fail_loc on all nodes...done. PASS 24v (32245s) resend_count is set to 4 4 resend_count is set to 4 4 resend_count is set to 4 4 resend_count is set to 4 4 resend_count is set to 4 4 == sanity test complete, duration 32252 sec == 21:21:51 (1381195311) </pre> </div></div> <p>Patch landed to master</p> <p>While validating patches for Lustre b2_5 branch, this failure occurred frequently:<br/> <a href="https://maloo.whamcloud.com/test_sets/34bbbc22-76c1-11e3-a9ab-52540035b04c" class="external-link" target="_blank" rel="nofollow noopener">https://maloo.whamcloud.com/test_sets/34bbbc22-76c1-11e3-a9ab-52540035b04c</a><br/> <a href="https://maloo.whamcloud.com/test_sets/040bb508-7754-11e3-a6a3-52540035b04c" class="external-link" target="_blank" rel="nofollow noopener">https://maloo.whamcloud.com/test_sets/040bb508-7754-11e3-a6a3-52540035b04c</a></p> <p>Here is the back-ported patch for Lustre b2_5 branch: <a href="http://review.whamcloud.com/8769" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/8769</a></p> <p>Landed for Lustre 2.5.1.</p> Related LU-2887 Development Rank 1|hzw50f: Rank (Obsolete) 10926 Severity