Re: HA options

From: Nuno Souto <dbvision_at_iinet.net.au>
Date: Mon, 05 Aug 2013 20:09:36 +1000
Message-ID: <51FF79E0.2040108_at_iinet.net.au>



On 5/08/2013 12:17 PM, Seth Miller wrote:

> There is a big difference between HA and DR. If you are looking for zero
> downtime for hardware patching, Data Guard (a DR solution) is not going to
> help you.

Isn't that what Maximum Protection and Maximum Availability modes of Dataguard cover?

> from multiple instances (servers). In the case of RAC, you can bring down
> one node of the cluster and the application will continue to run
> uninterrupted on the other nodes. This scenario can even be implemented
> across data centers (in some cases) and is referred to as a stretched or
> extended cluster.

What happens if the failure is in the storage layer? RAC only protects against processor failure.

-- 
Cheers
Nuno Souto
dbvision_at_iinet.net.au

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Received on Mon Aug 05 2013 - 12:09:36 CEST

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