Comments on: multiple instances of an Oracle database http://itknowledgeexchange.techtarget.com/itanswers/multiple-instances-2/ Mon, 20 May 2013 18:21:12 +0000 hourly 1 By: oracleif http://itknowledgeexchange.techtarget.com/itanswers/multiple-instances-2/#comment-74489 oracleif Thu, 04 Mar 2010 06:11:12 +0000 #comment-74489 On reflection, I thought it best to improve the answer to clarify the multi-server intent of RAC, so my earlier comment on the point is no longer relevant.

]]> By: oracleif http://itknowledgeexchange.techtarget.com/itanswers/multiple-instances-2/#comment-74488 oracleif Thu, 04 Mar 2010 05:51:25 +0000 #comment-74488 The answer provided fails to point out that RAC is for multiple server machines, each running an Oracle instance working as part of a cluster database, all accessing a common set of datafiles on external shared storage. That’s a fairly complex and expensive thing to configure for real world use (as opposed to a test lab, where you can use cheap hardware and iSCSI over gigabit Ethernet if you’re just trying to learn the technology). I can’t think of a reason in the world to run multiple instances against a single database on a single server – I’m not even sure that the installation software would understand it, as it’s going to be looking for all the things mentioned above (private network, virtual IPs, OCR, etc.), many of which only make sense when configuring 2 or more servers in a cluster.

]]> By: carlosdl http://itknowledgeexchange.techtarget.com/itanswers/multiple-instances-2/#comment-74428 carlosdl Tue, 02 Mar 2010 13:54:42 +0000 #comment-74428 You could use the Database Configuration Assistant (DBCA) to create new databases on the same server.

Why do you want to do that ? what is the purpose ?

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