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-4405 Lustre <p>Cray reported an stat performance degradation in master with older servers (pre &lt; 2.4).</p> <p>it's easy replicated with statmany tool, as now it's have only ~600 stats per second for same files.</p> <p>after bisect search by Cray </p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>Patrick Farrell: http://review.whamcloud.com/#/c/6460/8/lustre/mdc/mdc_locks.c Patrick Farrell: That's the patch that my bisection suggests is the problem </pre> </div></div> <p>after looking to logs - i see more getattr rpc's as should be in such situation.<br/> so root cause of additional RPC's - patch tries to match PERM bit in lock for servers don't supported such feature, after disabling it - stat rate is restored.</p> any client with <a href="http://review.whamcloud.com/#/c/6460/8/">http://review.whamcloud.com/#/c/6460/8/</a> patch landed. LU-4405

stat degradation (interoperability bug after landing a LU-3240)

Bug Blocker Resolved Fixed Cliff White Alexey Lyashkov mn4 patch Fri, 20 Dec 2013 11:20:01 +0000 Wed, 28 May 2014 07:03:43 +0000 Thu, 16 Jan 2014 18:35:16 +0000 Lustre 2.4.1 Lustre 2.5.0 Lustre 2.6.0 Lustre 2.5.2 0 8 <p>xyratex bug-id: MRP-1583, LELUS-206</p> <p><a href="http://review.whamcloud.com/8636" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/8636</a></p> <p>Will monitor this, thanks</p> <p>backport to b2_5:<br/> <a href="http://review.whamcloud.com/8847" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/8847</a></p> <p>Oleg will be landing the b2_5 patch soon. Master patch has landed.</p> <p>FYI, the b2_5 patch seems to have been forgotten.</p> <p>I am checking on getting this patch landed. Oleg is at LUG so the response may be a bit slower than normal, but if this patch can't land for some reason this week, I will reopen the ticket.</p> <p>Patch landed for 2.5.2.</p> Related LU-3240 Development Rank 1|hzwbpz: Rank (Obsolete) 12094 Severity