On 11 Aug 2014, at 10:10 pm, Cédric Dufour - Idiap Research Institute <cedric.duf...@idiap.ch> wrote:
> Hello, > > Thanks to Pacemaker 1.1.12, I have been able to setup a (very?) large cluster: Thats certainly up there as one of the biggest :) Have you checked pacemaker's CPU usage during startup/failover? I'd be interested in your results. > > Last updated: Mon Aug 11 13:40:14 2014 > Last change: Mon Aug 11 13:37:55 2014 > Stack: classic openais (with plugin) I would at least try running it with corosync 2.x (no plugin) That will use CPG for messaging which should perform even better. > Current DC: bc1hx5a05 - partition with quorum > Version: 1.1.12-561c4cf > 22 Nodes configured, 22 expected votes > 444 Resources configured > > PS: 'corosync' (1.4.7) traffic goes through a 10GbE network, with strict QoS > priority over all other traffic. > > Are there recommended configuration tweaks I should not miss in such > situation? > > So far, I have: > - Raised the 'PCMK_ipc_buffer' size to 2MiB > - Lowered the 'batch-limit' to 10 (though I believe my setup could sustain > the default 30) Yep, definitely worth trying the higher value. We _should_ automatically start throttling ourselves if things get too intense. Other than that, I would be making sure all the corosync.conf timeouts and other settings are appropriate. > > Thank you in advance for your response. > > Best, > > Cédric > > -- > > Cédric Dufour @ Idiap Research Institute > > > _______________________________________________ > Pacemaker mailing list: Pacemaker@oss.clusterlabs.org > http://oss.clusterlabs.org/mailman/listinfo/pacemaker > > Project Home: http://www.clusterlabs.org > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf > Bugs: http://bugs.clusterlabs.org
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