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-13668 Lustre <p>it should be possible to create mirror(s) while a file is opened for read.</p> LU-13668

open-for-read should not conflict with mirror creation

Improvement Minor Resolved Fixed Alex Zhuravlev Alex Zhuravlev HPv3 Fri, 12 Jun 2020 04:43:35 +0000 Fri, 14 Jan 2022 13:10:09 +0000 Sat, 11 Sep 2021 13:54:17 +0000 Lustre 2.15.0 0 8 <p>as reported by <a href="https://jira.whamcloud.com/secure/ViewProfile.jspa?name=jhammond" class="user-hover" rel="jhammond">jhammond</a> even lfs getstripe can interrupt replication:</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> # lfs mirror extend -N /mnt/lustre/f0 &amp; # lfs getstripe /mnt/lustre/f0 ... error: lfs mirror extend: /mnt/lustre/f0: data copy failed: Device or resource busy </pre> </div></div> <p>Alex Zhuravlev (bzzz@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/38964" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/38964</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-13668" title="open-for-read should not conflict with mirror creation" class="issue-link" data-issue-key="LU-13668"><del>LU-13668</del></a> mdt: change lock mode for lease<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 64412dd3964f2bece51aff3046b2c4af725d2392</p> <p>I hit the same issue while reading or writing to a file that is being replicated:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre># lfs mirror extend -N --pool=slow_pool -c 3 /mnt/lustre/dir/file &amp; [1] 55601 # tail /mnt/lustre/dir/file &lt;~snip~&gt; error: lfs mirror extend: /mnt/lustre/dir/file: data copy failed: Device or resource busy # lfs mirror extend -N --pool=slow_pool -c 3 /mnt/lustre/dir/file &amp; [1] 55603 # echo foo &gt;&gt; /mnt/lustre/dir/file error: lfs mirror extend: /mnt/lustre/dir/file: data copy failed: Device or resource busy </pre> </div></div> <p>"Oleg Drokin &lt;green@whamcloud.com&gt;" merged in patch <a href="https://review.whamcloud.com/38964/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/38964/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-13668" title="open-for-read should not conflict with mirror creation" class="issue-link" data-issue-key="LU-13668"><del>LU-13668</del></a> mdt: change lock mode for lease<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 2869f429ddc92ea6660fe210b098f6ff83c167f1</p> <p>Landed for 2.15</p> <p>"Etienne AUJAMES &lt;eaujames@ddn.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/46113" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/46113</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-13668" title="open-for-read should not conflict with mirror creation" class="issue-link" data-issue-key="LU-13668"><del>LU-13668</del></a> mdt: change lock mode for lease<br/> Project: fs/lustre-release<br/> Branch: b2_12<br/> Current Patch Set: 1<br/> Commit: 02e845c3f9dfdcc08cd3c3ff3a8c6ee750b1eb68</p> <p>This issue could be annoying when migrating files with "--non-blocking" option on a filesystem with a scanning software (like robinhood).<br/> We observed at the CEA that robinhood can cause lot of migration failures by getting file layout information (or fid : "lfs path2fid").</p> Related LU-13693 Development Rank 1|i012lj: Rank (Obsolete) 9223372036854775807