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-7140 Lustre <p>We have found that setting osc.max_pages_per_rpc=1024 leads to few 4 MB BRW rpcs.</p> <p>More details and a patch will be uploaded shortly.</p> LU-7140

Few 4 MB BRW rpcs from readahead path

Improvement Minor Resolved Won't Fix WC Triage Andrew Perepechko patch Fri, 11 Sep 2015 08:56:58 +0000 Tue, 31 May 2016 14:02:05 +0000 Tue, 31 May 2016 13:55:02 +0000 0 8 <p>Andrew Perepechko (andrew.perepechko@seagate.com) uploaded a new patch: <a href="http://review.whamcloud.com/16374" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/16374</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-7140" title="Few 4 MB BRW rpcs from readahead path" class="issue-link" data-issue-key="LU-7140"><del>LU-7140</del></a>: configurable readahead step<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 500cc2eac76d1c24f807aa5faf4344a3372e5585</p> <p>I have to ask what is the advantage of making read ahead step size configurable? Wouldn't be simpler to just adjust the read ahead step to be based on max_pages_per_rpc instead. Also if their is a benefit to making the read ahead step configurable why in megabytes. I think it would be better in pages. Especially since user can pass in strange values that end up having to be rounded to the nearest page anyways.</p> <p>James, since so many people requested to make the step automatic, I updated the patch according to Jinshan Xiong's proposal.</p> <p>I think that this work has been superceded by the developmentin <a href="https://jira.whamcloud.com/browse/LU-7990" title=" Large bulk IO support" class="issue-link" data-issue-key="LU-7990"><del>LU-7990</del></a></p> Related LU-7990 Development Rank 1|hzxnaf: Rank (Obsolete) 9223372036854775807