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-12071 Lustre <p>pagecache invalidation is quite expensive:</p> <p>pagecache enabled:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>ost 1 sz 268435456K rsz 16384K obj 16 thr 64 write 5094.16 [2287.82, 6383.46] read 5295.85 [5039.42, 5567.47] </pre> </div></div> <p>pagecache disabled:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>ost 1 sz 268435456K rsz 16384K obj 16 thr 64 write 4460.22 [3615.59, 5151.63] read 5218.00 [4847.41, 5551.34] </pre> </div></div> <p>we do already have a mechanism to bypass pagecache in place, just need to use that properly.</p> LU-12071

bypass pagecache for large files

Improvement Minor Resolved Fixed Alex Zhuravlev Alex Zhuravlev Thu, 14 Mar 2019 13:22:57 +0000 Fri, 25 Nov 2022 02:27:28 +0000 Fri, 6 Dec 2019 02:37:27 +0000 Lustre 2.14.0 0 9 <p>Alex Zhuravlev (bzzz@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/34422" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/34422</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12071" title="bypass pagecache for large files" class="issue-link" data-issue-key="LU-12071"><del>LU-12071</del></a> osd-ldiskfs: bypass pagecache if requested<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 4652ad0b0d65b616b11c27829c221521003c623b</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/34422/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/34422/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12071" title="bypass pagecache for large files" class="issue-link" data-issue-key="LU-12071"><del>LU-12071</del></a> osd-ldiskfs: bypass pagecache if requested<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 3043c6f18964b0cc843b2e7866756a1d1ddd61e3</p> <p>Landed for 2.14</p> Duplicate LU-11341 LU-12346 Related LU-410 LU-11347 LU-12016 LU-13680 LU-12179 Development Rank 1|i00dcv: Rank (Obsolete) 9223372036854775807