Multiple DBs on One RAC - Adding New Nodes and Different Storage

From: David Barbour <>
Date: Thu, 26 Dec 2013 13:22:59 -0600
Message-ID: <>

Merry Christmas (to those of you who celebrate), Happy Holidays (to those who may not but have something going on - including New Year's), and Good Afternoon:

We are currently running a 3-node RAC on RHEL 6.3(version 2.6.32-279.22.1.el6.x86_64), Oracle on ASM. Storage is fibre-connected EMC VMAX. Cluster cache communication is handled via Infiband. We are adding a new application and two nodes. The question arises with the storage. We're putting the new application on a Dell Compellent SAN. Also fibre connected. The plan is to make the 2 new nodes the primary nodes for this application, and make node 3 of the current cluster the fail-over.

Can anyone who has used multiple different SANs before provide any hints/tips/tricks/pitfalls?

Will we have to serve the current EMC Storage to the new nodes? I don't see why as we're not expanding the number of instances of the currently running application. But we will have to zone the new storage to connect to the third node of the current cluster. Any thoughts on how to install this new application? I don't really want instances of it on Nodes 1 & 2 at all. If I make Node 3 the master node and install from there, I should be able to pick Nodes 4 & 5 on which to create the other new instances.

Any thoughts?

Received on Thu Dec 26 2013 - 20:22:59 CET

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