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-3859 Lustre <p>While invested a sort of LNet bugs i tried to dump a rpc cache on OST after fail and find most of rpc in cache is grant shrink requests - it's produce a large load to the routers and OST's.</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">ffff8807b9cc3440 rpc_cache 1024 313 896 224 4k # grep -c RQF_OST_SET_GRANT_INFO \&amp;\ log 304 </pre> </div></div> <p>so 304 from 313 RPC's is flood from grant shrinker.</p> xyratex lustre (mostly 2.1 based) LU-3859

grant shrinker floods OST and produce a large load

Bug Critical Resolved Cannot Reproduce WC Triage Alexey Lyashkov Thu, 29 Aug 2013 15:26:52 +0000 Tue, 11 Dec 2018 00:02:01 +0000 Tue, 11 Dec 2018 00:02:01 +0000 0 2 <p>We don't actually have OBD_CONNECT_GRANT_SHRINK enabled on the clients in our version of Lustre.</p> <p>I agree that it shouldn't be flooding the server with these requests - grant shrinking should only happen occasionally, like on a ping. The default interval GRANT_SHRINK_INTERVAL is 1200s, but this would be sent from multiple clients if they are idle and not using the grant. It should only be a one-time event.</p> <p>No activity here in 5 years and this is likely fixed with <a href="https://jira.whamcloud.com/browse/LU-8708" title="Grant shrinking disabled all the time" class="issue-link" data-issue-key="LU-8708"><del>LU-8708</del></a>.</p> Related LU-6951 LU-8708 LU-7015 Development Rank 1|hzvznz: Rank (Obsolete) 10011 Severity