Glory Smith wrote: > On Tue, Mar 24, 2009 at 12:16 PM, Dominik Klein <d...@in-telegence.net> wrote: > >> Glory Smith wrote: >>> Hi All, >>> when we create a resource , how pacemaker choose a node to start >> resource >>> on it. >>> >>> To be more clear , suppose we have four node cluster , we configure any >>> resource xx and we see that it is started on say , node C . so my >>> question is why node C is choosen to run the resource xx. is this >> behavior >>> is random or some logic is behind this. >>> >>> Thanks for your enlightening answers. >> If you don't tell the cluster where to start the resource (through >> constraints), it will try to balance resources throughout the nodes. It >> does however _not_ (yet) take node hardware or load into account. >> > > suppose there is no resource running anywhere on cluster . if anyone > configure a resource (it will be first resource) then on which node it will > be placed.?
That is supposed to be random, but in my experience it is always the same node. I don't know anything about the actual algorithm though. > does during failover also cluster try to balance resources?? Yes. If you don't have any preferences configured, it may happen that if one resource needs to be failed over to a certain node, that other resources that are currently running there are migrated to another node to balance resources across nodes. You can use the resource-stickiness meta attribute to avoid that. Regards Dominik _______________________________________________ Pacemaker mailing list Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker
