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-6741] OSP should use inline data for small requests https://jira.whamcloud.com/browse/LU-6741 Lustre <p>we shouldn't use bulks to transfer updates unless it's needed. otherwise all "interactive" requests (like lookups, getattrs, etc) need 2 RTTs instead of one.</p> LU-6741 OSP should use inline data for small requests Bug Critical Resolved Fixed Di Wang Alex Zhuravlev Thu, 18 Jun 2015 04:04:43 +0000 Fri, 9 Sep 2016 19:30:00 +0000 Tue, 6 Oct 2015 14:21:22 +0000 Lustre 2.8.0 Lustre 2.8.0 0 6 <p>Alex, what is the impact of this issue? It seems like only a potential performance improvement, but if this is a protocol change for the Async Commit code then I guess it needs to be in 2.8.0?</p> <p>well, the older versions don't support bulks, right? so, i'd think it's a protocol change. then... I'd say this is a performance regression because in the current release we don't need 2*RTT to fetch attributes (e.g., used all the time by LFSCK), it's a single RTT currently..</p> <p>This seems important, so I will work on a patch before 2.8 release.</p> <p>So is the perf regression only for DNE, DNE2? Or would single MDT configs be affected as well?</p> <p>LFSCK uses this protocol to access data on OST, so this will be affected too.</p> <p>wangdi (di.wang@intel.com) uploaded a new patch: <a href="http://review.whamcloud.com/15899" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/15899</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-6741" title="OSP should use inline data for small requests" class="issue-link" data-issue-key="LU-6741"><del>LU-6741</del></a> osp: Pack small request inline<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: c1449b11107442b6cfc81287709b64ac83c5f893</p> <p>wangdi (di.wang@intel.com) uploaded a new patch: <a href="http://review.whamcloud.com/16353" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/16353</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-6741" title="OSP should use inline data for small requests" class="issue-link" data-issue-key="LU-6741"><del>LU-6741</del></a> osp: Pack small request inline<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 94431647ecb69a709928d56bf13104e20843e397</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="http://review.whamcloud.com/16353/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/16353/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-6741" title="OSP should use inline data for small requests" class="issue-link" data-issue-key="LU-6741"><del>LU-6741</del></a> osp: Pack small request inline<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: dcaf8a6724ef36f2124428a755b5bb39bcd0c5fd</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="http://review.whamcloud.com/15899/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/15899/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-6741" title="OSP should use inline data for small requests" class="issue-link" data-issue-key="LU-6741"><del>LU-6741</del></a> osp: bulk transfer for osp_md_read<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 28638e84cde481d0216ffc1d170e272bc2cccc76</p> <p>Landed for 2.8</p> Related LU-6831 LU-7128 Development Rank 1|hzxg3j: Rank (Obsolete) 9223372036854775807 Severity