On Thu, 02 Aug 2012 09:39:34 +0200 Heiko Nardmann wrote: > If that is a real production system and not just for playing you should setup > a test environment before and also create a plan which usecases should run with the new cluster. +1 for sure for what Heiko recommended Plus, first place: http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Cluster_Administration/ch-overview-CA.html#s2-newfeatures-6.3-CA and links I remember some problems passing from 6.1 to 6.2, because I had virtual machines configured as cluster services. If it is your case, the first place to search for vm compatibility is the table 4.1 at http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/Live_migration_and_RHEL_compatibility.html See also my thread about clvmd problems I'm facing in 6.3 (but it is CentOS) https://www.redhat.com/archives/linux-cluster/2012-August/msg00006.html Also these pointers could help in evaluation: https://www.redhat.com/archives/rhelv6-list/2012-January/msg00024.html and previous and following posts of the thread https://access.redhat.com/knowledge/solutions/68077 HIH, Gianluca PS: share your clvmd in 6.3 experience then, it you have it... ;-) -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster