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-9090 Lustre <p>The default RPC size is still 1MB, even though it could be increased to 4MB. This should be accompanied by a change to the default stripe size to also be 4MB so that widely-striped files can generate full RPCs without pinning so much memory on the client. This should provide a noticeable improvement in performance for streaming read/write workloads.</p> <p> </p> <div class='table-wrap'> <table class='confluenceTable'><tbody> <tr> <td class='confluenceTd'>1MB RPC</td> <td class='confluenceTd'>1MB RPC</td> <td class='confluenceTd'>4MB RPC</td> <td class='confluenceTd'>4MB RPC</td> <td class='confluenceTd'>16MB RPC</td> <td class='confluenceTd'>16MB RPC</td> </tr> <tr> <td class='confluenceTd'>Write(Buffered)</td> <td class='confluenceTd'>Write(O_DIRECT)</td> <td class='confluenceTd'>Write(Buffered)</td> <td class='confluenceTd'>Write(O_DIRECT)</td> <td class='confluenceTd'>Write(Buffered)</td> <td class='confluenceTd'>Write(O_DIRECT)</td> </tr> <tr> <td class='confluenceTd'>16.2</td> <td class='confluenceTd'>22.5</td> <td class='confluenceTd'>26.7</td> <td class='confluenceTd'>30.3</td> <td class='confluenceTd'>28.2</td> <td class='confluenceTd'>32.3</td> </tr> <tr> <td class='confluenceTd'> </td> <td class='confluenceTd'> </td> <td class='confluenceTd'> </td> <td class='confluenceTd'> </td> <td class='confluenceTd'> </td> <td class='confluenceTd'> </td> </tr> <tr> <td class='confluenceTd'>Read(Buffered)</td> <td class='confluenceTd'>Read(O_DIRECT)</td> <td class='confluenceTd'>Read(Buffered)</td> <td class='confluenceTd'>Read(O_DIRECT)</td> <td class='confluenceTd'>Read(Buffered)</td> <td class='confluenceTd'>Read(O_DIRECT)</td> </tr> <tr> <td class='confluenceTd'>15.3</td> <td class='confluenceTd'>17.5</td> <td class='confluenceTd'>22.7</td> <td class='confluenceTd'>21.9</td> <td class='confluenceTd'>31.4</td> <td class='confluenceTd'>26.1</td> </tr> </tbody></table> </div> LU-9090

increase default RPC size to 4MB

Improvement Major Resolved Fixed Jian Yu Andreas Dilger Wed, 30 Sep 2015 22:38:22 +0000 Thu, 23 Jan 2020 20:13:28 +0000 Mon, 29 May 2017 20:53:20 +0000 Lustre 2.10.0 Lustre 2.10.0 0 6 <p>Andreas Dilger (andreas.dilger@intel.com) uploaded a new patch: <a href="https://review.whamcloud.com/25336" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/25336</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-9090" title="increase default RPC size to 4MB" class="issue-link" data-issue-key="LU-9090"><del>LU-9090</del></a> ofd: increase default OST BRW size to 4MB<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 246f0375770a87744aefb883f9d6966b006bc6d6</p> <p>Jian, do you think you have time to look through the test failures on this patch to see what needs to be fixed for it to land? Increasing the default RPC size to 4MB should improve the "out of box" performance for Lustre, and is something that many sites already have configured today, so I think that we should make it the default.</p> <p>Sure, Andreas, will do.</p> <p>Jian Yu (jian.yu@intel.com) uploaded a new patch: <a href="https://review.whamcloud.com/27151" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/27151</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-9090" title="increase default RPC size to 4MB" class="issue-link" data-issue-key="LU-9090"><del>LU-9090</del></a> lov: increase default stripe size to 4MB<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 205e114e64f9640882892a071bca5747d4613bb8</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="https://review.whamcloud.com/25336/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/25336/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-9090" title="increase default RPC size to 4MB" class="issue-link" data-issue-key="LU-9090"><del>LU-9090</del></a> ofd: increase default OST BRW size to 4MB<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 8c9c1f59d99c924e16317495269b8270cb0be921</p> Related LU-10465 LU-10463 Development Rank 1|hzxp93: Rank (Obsolete) 9223372036854775807