On Friday 20 July 2007, Sebastian Reitenbach wrote: > Hi list, > > I am trying to setup a two node cluster with lots of cloned services, ldap, > dns, squid, cups, tftp, and active active nfs,... Each of the two nodes is a > member in nine vlan's. For each service, a group of 9 virtual addresses is > configured. Every resource is monitored, and in case it fails, the node > should be fenced. > Up to about 40 or 50 resouces, everything is working as expected. when > suspending or reactivating the cluster, some resources start to fail and the > GUI becomes so unresponsive, so that I have to restart it. when I add more > resources, everything gets more wild, so far, that when I suspend or rejoin > a node via the GUI, the GUI freezes, and then the crm_mon too is unable to > connect to the cluster, on any node, so that the heartbeat has to be > restarted. From my experience I recommend not to use the GUI. It never did the job for me (specially not creating a configuration).
From your description I assume you have timing problems. Keep in mind that cluster node startups really generate a load on the HA system. Each resource is probed (basically it runs a 'monitor' operation on each resource on each cluster node). So if you have 2 nodes with 40 resources a node startup ---> 80 monitor actions initiated ---> 80 responses ---> 80 changes in the CIB --> 80 redistributions (not to mention the engine calulcating your failove-rules for all the resources). Did you write Resource Agents on your own? Or do you use only the standard HA RA? Are you using clones? You see ... attaching the CIB as attachment would help ;-) > > I don't want to add my resources as cib file here, because it is more than > 20 pages printed out :) Well you could attach the CIB (bzip2 is your friend). Without it no one can help here. So we can see which resource failed and maybe where the problem in your configuration is. > > how many resources does the linux-ha cluster can manage? would it help to > tweak some timings, if so, which would that be? Or would it help to reduce > the load when I e.g. change the IPaddress resource to manage a group of > aliases, for each vlan? > > any experiences and hints appreciated. > > kind regards > Sebastian > > _______________________________________________ > Linux-HA mailing list > [email protected] > http://lists.linux-ha.org/mailman/listinfo/linux-ha > See also: http://linux-ha.org/ReportingProblems > _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
