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-11404 Lustre <p>workload like dd oflag=sync causes MDS_SYNC RPC on every write(2) syscall.</p> <p>given the only things we store on MDS are file itself and layout it should be enough to send MDS_SYNC once (to sync file creation) and once for every layout change.</p> <p> </p> LU-11404

improve fsync() and fdatasync()

Improvement Minor Resolved Fixed Alex Zhuravlev Alex Zhuravlev Wed, 19 Sep 2018 18:58:58 +0000 Tue, 11 Apr 2023 20:33:01 +0000 Tue, 11 Apr 2023 20:33:01 +0000 Upstream Lustre 2.16.0 0 4 <p>with <a href="https://review.whamcloud.com/#/c/33175/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/#/c/33175/</a> :</p> <p>SLOW=yes sh sanity-benchmark.sh the client got 6931 fsync() requests and 3362 (48.5%) were need to be sent to MDT.</p> <p>Is DoM a special case in that sense and need own handling?</p> <p>"Oleg Drokin &lt;green@whamcloud.com&gt;" merged in patch <a href="https://review.whamcloud.com/c/fs/lustre-release/+/33175/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/33175/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11404" title="improve fsync() and fdatasync()" class="issue-link" data-issue-key="LU-11404"><del>LU-11404</del></a> llite: only first sync to MDS matter<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 1c8a49bedff274677594833cb4958027c6b338db</p> <p>Landed for 2.16</p> Development Rank 1|i002qf: Rank (Obsolete) 9223372036854775807