Hello Lars: I'm still somewhat not clear about this monitor interval setting. What I observed is that the pacemaker always quickly (in less then 2 seconds) schedule the failed resource when I just cut down the network (via DROP INPUT, or freeze kernel). And it also schedule the failed resource in no more than 5 seconds while I put the online node to standby state. Is there wrong assumption made by me? Thanks.
On Fri, Sep 13, 2013 at 2:45 PM, Lars Marowsky-Bree <l...@suse.com> wrote: > On 2013-09-13T12:20:54, Xiaomin Zhang <zhangxiao...@gmail.com> wrote: > > > Hi, Gurus: > > Here's a question about service Monitor Interval: considering this value > is > > configured as '15' seconds, does this mean corosync/pacemaker will take > > average 15 seconds to schedule failed resource on a ready node? > > It'll take about a maximum of 15 seconds to schedule a monitoring > operation that can detect the error. > > If the monitor operation returns within <1s with a failure, that'll mean > the recovery will begin real quick. > > If the monitor operation *doesn't* return but hit it's "timeout" (and is > aborted by the lrmd), then the recovery will be delayed by that much. So > for an ``interval=15 timeout=30'', it could take up to 45s before > recovery is scheduled. > > Note however this on timeouts: > http://advogato.org/person/lmb/diary/108.html Just making them shorter > isn't necessarily always beneficial, either. > > > Best, > Lars > > -- > Architect Storage/HA > SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix > Imendörffer, HRB 21284 (AG Nürnberg) > "Experience is the name everyone gives to their mistakes." -- Oscar Wilde > > > _______________________________________________ > 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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