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-4001 Lustre <p>Tuning experiments done by one of our SE's, Bobbie Lind, found that the map_on_demand parameter has a significant performance improvement when turned on with Truescale IB cards. Currently, we leave this parameter off as it does not have a positive effect with Mellanox IB cards.</p> <p>This ticket calls for an improvement whereby we detect the brand of IB card (Truescale or Mellanox) and set the default for map_on_demand accordingly (off for Mellanox, a reasonable value for Truescale).</p> LU-4001

Auto-adapt LND tunables to the brand of IB interface

Improvement Minor Closed Duplicate Amir Shehata Doug Oucharek Tue, 24 Sep 2013 17:27:15 +0000 Thu, 9 Jul 2015 22:01:39 +0000 Thu, 9 Jul 2015 22:01:38 +0000 Lustre 2.8.0 0 6 <p>While maybe an unlikely and pathological case, but it occurs to me that there's nothing to prevent a user from having a mix of Truescale and Mellanox in the same system. What then?</p> <p>The Dynamic LNet Config project, aimed at a 2.6 release, is converting some of the tuning parameters from being per-LND to being per-network interface. However, map_on_demand is currently not one of them. I will work to get it added.</p> <p>Without the patch from <a href="https://jira.whamcloud.com/browse/LU-3322" title="ko2iblnd support for different map_on_demand and peer_credits between systems" class="issue-link" data-issue-key="LU-3322"><del>LU-3322</del></a> clusters with both Mellanox and Truescale cards would be unable to connect.</p> <p>Addressed in <a href="https://jira.whamcloud.com/browse/LU-6735" title="select appropriate optimization options for ko2iblnd according IB cards installed on the system" class="issue-link" data-issue-key="LU-6735"><del>LU-6735</del></a></p> Development Rank 1|hzw3t3: Rank (Obsolete) 10711