Whamcloud Community JIRA https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 [LU-10448] policy to pick a primary for mirrored write https://jira.whamcloud.com/browse/LU-10448 Lustre <p>For a mirrored file, when it is written at the first time, the policy to pick a replica as primary is primitive, either it just chooses the first replica or a random one. A policy function should be defined for replica choosing. At least it should avoid the replicas with unavailable OSTs.</p> LU-10448 policy to pick a primary for mirrored write Improvement Major Resolved Fixed Zhenyu Xu Zhenyu Xu Wed, 3 Jan 2018 03:32:47 +0000 Fri, 2 Mar 2018 01:38:57 +0000 Wed, 14 Feb 2018 02:28:50 +0000 Lustre 2.11.0 Lustre 2.11.0 0 5 <p>For 2.11 at a very minimum it should avoid selecting replicas that are not available. Otherwise FLR is mostly not useful in case of failures?</p> <p>Bobi Jam (bobijam@hotmail.com) uploaded a new patch: <a href="https://review.whamcloud.com/30711" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/30711</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-10448" title="policy to pick a primary for mirrored write" class="issue-link" data-issue-key="LU-10448"><del>LU-10448</del></a> lod: pick primary mirror for write<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: dc578c783c1aa74c2656e6cb481e3b69bb01c18a</p> <p>Andreas - this is about the policy for picking a replica for write. FLR is still useful for read w/o this feature.</p> <p>This is needed for 2.11 so that writes don't pick unavailable replicas.</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="https://review.whamcloud.com/30711/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/30711/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-10448" title="policy to pick a primary for mirrored write" class="issue-link" data-issue-key="LU-10448"><del>LU-10448</del></a> lod: pick primary mirror for write<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 6b373937774d0b3736d02b260be9a81c7eff5351</p> <p>Landed for 2.11</p> Related LU-9771 LU-10158 LU-10670 Development Rank 1|hzzqan: Rank (Obsolete) 9223372036854775807