Right, to follow up with what Andrew said, and to (hopefully) clarify, if you have a two-node cluster, there can and will be only one instance and version of clusterware installed. This is true regardless of how many clustered databases will be running on the cluster. -Mark -- Mark J. Bobak Senior Database Administrator, System & Product Technologies ProQuest 789 E. Eisenhower, Parkway, P.O. Box 1346 Ann Arbor MI 48106-1346 +1.734.997.4059 or +1.800.521.0600 x 4059 mark.bobak@xxxxxxxxxxxx<mailto:mark.bobak@xxxxxxxxxxxxxxx> www.proquest.com<http://www.proquest.com> www.csa.com<http://www.csa.com> ProQuest...Start here. From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Andrew Kerber Sent: Thursday, August 21, 2008 8:36 AM To: eglewis71@xxxxxxxxx Cc: oracle-l@xxxxxxxxxxxxx Subject: Re: rac question Do you mean two different two-instance databases? Yes, its possible. Nothing really special to worry about it. On Thu, Aug 21, 2008 at 5:55 AM, ed lewis <eglewis71@xxxxxxxxx<mailto:eglewis71@xxxxxxxxx>> wrote: Hello, In a 2-node cluster is it possible to have 2 Rac Clusters, installed on the 2 servers ? If so, any issues to consider. thanks ed -- Andrew W. Kerber 'If at first you dont succeed, dont take up skydiving.'