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-5676 Lustre <p>For a striped directory, the on-disk master LMV EA only contains the header information, not contains the FIDs of the shards. When some thread tries to access the master LMV EA, it will trigger the iteration against all the shards to collect the FID of each shard to compose of the integrated master LMV EA. Currently, we have no cache for the master LMV EA in LOD, then it will cause iteration every time when the master LMV EA accessed. To avoid that, we can cache the master LMV EA in LOD.</p> LU-5676

DNE 2: cache LMV EA in LOD

Bug Minor Resolved Duplicate Di Wang nasf Sat, 27 Sep 2014 03:09:27 +0000 Fri, 28 Feb 2020 00:00:28 +0000 Fri, 28 Feb 2020 00:00:28 +0000 0 5 <p>This isn't really an LFSCK 3 debt, but rather one for DNE 2. </p> <p>nasf: could you please check the patch in <a href="https://jira.whamcloud.com/browse/LU-5663" title="mds-survey performance regress on master" class="issue-link" data-issue-key="LU-5663"><del>LU-5663</del></a> to see if that is what you need?</p> <p>Di: which patch you mean? I only saw one patch (<a href="http://review.whamcloud.com/#/c/10376/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/10376/</a>) mentioned in <a href="https://jira.whamcloud.com/browse/LU-5663" title="mds-survey performance regress on master" class="issue-link" data-issue-key="LU-5663"><del>LU-5663</del></a>, but I do not think it is related with LMV EA cache. Missed anything?</p> <p>Di: opening this ticket is NOT because some bad test results we have ever observed. I do not think <a href="https://jira.whamcloud.com/browse/LU-5663" title="mds-survey performance regress on master" class="issue-link" data-issue-key="LU-5663"><del>LU-5663</del></a> has any relationship with this one.</p> <p>I believe this was implemented as part of <a href="https://jira.whamcloud.com/browse/LU-7660" title="FS default striping settings only honored on MDT 0" class="issue-link" data-issue-key="LU-7660"><del>LU-7660</del></a>.</p> Related LU-6999 LU-7660 LU-8159 Development Rank 1|hzwx93: Rank (Obsolete) 15898 Severity