Re: HA options
- From: Nuno Souto <dbvision@xxxxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Mon, 05 Aug 2013 20:09:36 +1000
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@xxxxxxxxxxxx
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