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-14508 Lustre <p><tt>lfs mirror extend -N</tt> sometimes causes the file atime to go backwards:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre># echo XXX &gt; f0; stat f0; sleep 60; cat f0; stat f0; sleep 60; date; lfs mirror extend -N -p ddn_hdd f0; stat f0 File: ‘f0’ Size: 4 Blocks: 1 IO Block: 4194304 regular file Device: 2c54f966h/743766374d Inode: 144115205289279491 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2021-03-10 10:17:48.000000000 -0600 Modify: 2021-03-10 10:17:48.000000000 -0600 Change: 2021-03-10 10:17:48.000000000 -0600 Birth: - XXX File: ‘f0’ Size: 4 Blocks: 8 IO Block: 4194304 regular file Device: 2c54f966h/743766374d Inode: 144115205289279491 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2021-03-10 10:18:48.000000000 -0600 Modify: 2021-03-10 10:17:48.000000000 -0600 Change: 2021-03-10 10:17:48.000000000 -0600 Birth: - Wed Mar 10 10:19:48 CST 2021 File: ‘f0’ Size: 4 Blocks: 8 IO Block: 4194304 regular file Device: 2c54f966h/743766374d Inode: 144115205289279491 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2021-03-10 10:17:48.000000000 -0600 Modify: 2021-03-10 10:17:48.000000000 -0600 Change: 2021-03-10 10:17:48.000000000 -0600 Birth: - </pre> </div></div> LU-14508

lfs mirror operations do not preserve timestamps

Bug Minor Resolved Fixed Zhenyu Xu John Hammond bjhpflr Wed, 10 Mar 2021 20:30:34 +0000 Mon, 13 Feb 2023 17:00:08 +0000 Thu, 22 Jul 2021 03:41:02 +0000 Lustre 2.15.0 0 5 <p>This could happen if the most recent atime was stored on the OST objects from patch <a href="https://review.whamcloud.com/38024" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/38024</a> "<tt><a href="https://jira.whamcloud.com/browse/LU-13383" title="lazy atime update on OST" class="issue-link" data-issue-key="LU-13383"><del>LU-13383</del></a> ofd: lazy atime update</tt>", but is not propagated to the new OST mirror and the old mirror is removed? It <em>shouldn't</em> happen just from adding a mirror, AFAIK, unless the "stat" is only accessing the new mirror copy's OST objects and not the old mirror's objects. Another possibility is that the "<tt>cat</tt>" step is causing LSOM to store the size/blocks on the MDT, and then the client is no longer fetching attributes from the OST(s) at all, but that would require a new client with statx() support (maybe RHEL8.3/Ubuntu20.04).</p> <p>John L. Hammond (jhammond@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/42009" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/42009</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-14508" title="lfs mirror operations do not preserve timestamps" class="issue-link" data-issue-key="LU-14508"><del>LU-14508</del></a> lfs: make mirror operations preserve timesstamps<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: b6968a22b0e5271085fc8f63aec92599e259b249</p> <p><a href="https://jira.whamcloud.com/secure/ViewProfile.jspa?name=bobijam" class="user-hover" rel="bobijam">bobijam</a> could you take over on this one too? I created a patch that doesn't quite work and seems to have some ldlm issues. But perhaps you can fix it or at least reuse the tests.</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/42009/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/42009/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-14508" title="lfs mirror operations do not preserve timestamps" class="issue-link" data-issue-key="LU-14508"><del>LU-14508</del></a> lfs: make mirror operations preserve timestamps<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 9f672d8a71d8f77d2e807f1d4df926239ade8ebd</p> <p>Landed for 2.15</p> Duplicate LU-15557 Related LU-14526 Development Rank 1|i01p13: Rank (Obsolete) 9223372036854775807 Severity