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-16214 Lustre <p>When LNET is restarted at a target the kfilnd peer is marked as stale. An incoming message from the initiator peer is silently dropped and a peer handshake exchange is started.</p> <p>While this works as designed, since kfilnd is connectionless, it is not optimal because kfilnd clients must rely on their error handing to figure out a message was dropped and then retry.</p> <p>The purpose of this story is to determine how to minimize the occurrence of dropped kfilnd messages.</p> <p>One thought is to have kfilnd proactively do a hello handshake on a send if a message hasn't been received from a peer for some period of time. Similar to what it does when it knows the peer is stale.</p> LU-16214

Minimize dropping kfilnd messages at target due to stale peer

Bug Minor Resolved Fixed Chris Horn Chris Horn Wed, 5 Oct 2022 15:54:59 +0000 Thu, 19 Jan 2023 20:39:16 +0000 Thu, 19 Jan 2023 20:39:16 +0000 Lustre 2.16.0 0 2 <p>"Chris Horn &lt;chris.horn@hpe.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/c/fs/lustre-release/+/48785" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/48785</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-16214" title="Minimize dropping kfilnd messages at target due to stale peer" class="issue-link" data-issue-key="LU-16214"><del>LU-16214</del></a> kfilnd: Keep stale peer entries<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 52f14a75c73fe21a5828a8de00f05dabe20bae34</p> <p>"Chris Horn &lt;chris.horn@hpe.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/c/fs/lustre-release/+/48786" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/48786</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-16214" title="Minimize dropping kfilnd messages at target due to stale peer" class="issue-link" data-issue-key="LU-16214"><del>LU-16214</del></a> kfilnd: Proactively handshake old peers<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 05dc08cb00cd29d1adbe3532fec75e8d15cd6d82</p> <p>"Oleg Drokin &lt;green@whamcloud.com&gt;" merged in patch <a href="https://review.whamcloud.com/c/fs/lustre-release/+/48785/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/48785/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-16214" title="Minimize dropping kfilnd messages at target due to stale peer" class="issue-link" data-issue-key="LU-16214"><del>LU-16214</del></a> kfilnd: Keep stale peer entries<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: c1f7eaa24f14aa567b80d99676c765db2b331d40</p> <p>"Oleg Drokin &lt;green@whamcloud.com&gt;" merged in patch <a href="https://review.whamcloud.com/c/fs/lustre-release/+/48786/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/48786/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-16214" title="Minimize dropping kfilnd messages at target due to stale peer" class="issue-link" data-issue-key="LU-16214"><del>LU-16214</del></a> kfilnd: Proactively handshake old peers<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: de2536850ed2ecc2169dec4ccc458589314b2896</p> <p>Landed for 2.16</p> Development Rank 1|i0323r: Rank (Obsolete) 9223372036854775807 Severity