Re: Taking export from SECONDARY_INSTANCE from 02 node RAC

From: Mladen Gogala <>
Date: Thu, 26 Feb 2009 23:35:36 +0000 (UTC)
Message-ID: <go7908$hpp$>

On Thu, 26 Feb 2009 19:17:03 +0100, sybrandb wrote:

> It wouldn't matter as you are already greatly abusing RAC. If you don't
> use the second instance at all, you either don't need RAC, or you should
> configure RAC ClusterGuard I, which comes with RAC, and which is an
> active/passive configuration.

I distinctly remember a debate from oracle-l, from the times when Steve Adams did not behave like the Great Inquisitor and protector of Faith and Morality, in which nobody could find anything about the product called "RAC ClusterGuard I".

The obvious question would be why RAC when DG can do the trick? For RAC, you need to license both RDBMS and RAC for each node you use it on. The cost of the RAC license is typically 50% of the normal license, so 2 node RAC would cost as 3 single instance databases. Physical standby, on the other hand, costs 50% of the normal license. That means that an active-passive configuration you are talking about would cost you 1.5 times more than the single instance version.

Received on Thu Feb 26 2009 - 17:35:36 CST

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