-----Original message----- To: pacemaker@oss.clusterlabs.org; From: Patrick H. <pacema...@feystorm.net> Sent: Wed 12-01-2011 00:06 Subject: [Pacemaker] Speed up resource failover? Attachment: inline.txt > As it is right now, pacemaker seems to take a long time (in computer terms) > to > fail over resources from one node to the other. Right now, I have 477 IPaddr2 > resources evenly distributed among 2 nodes. When I put one node in standby, > it > takes approximately 5 minutes to move the half of those from one node to the > other. And before you ask, theyre because of SSL http virtual hosting. I have > no order rules, colocations or anything on those resources, so it should be > able migrate the entire list simultaneously, but it seems to do them > sequentially. Is there any way to make it migrate the resources in parallel? > Or > at the very least speed it up?
Patrick, It's probably not so much the cluster suite but is has to do with the specific resource script. For a proper takeover of a IP you have to do an arp "deregister/register". This will take a few seconds. As long as a resource script is busy the cluster suite will not start the next action. Parallel execution is not possible in the cluster suite as far as I know. (without being a programmer myself I would expect it is pretty tricky to implement parallelization "code-wise" and making 100% sure the cluster does not break) You could consider to edit the IPaddr2 resource script so it does not wait for the arp commands. At you're own risk of course ;-) Kind regards, Robert van Leeuwen _______________________________________________ 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://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
