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On 6/17/12 7:04 PM, YesGood wrote:
>
> says:
> one that can accept connections and serves read-only queries is called
> a /hot standby/ server.
That would require logic in the app to send read-only queries to the
correct system.
>
> You say you want it for performance, but when a system dies you
> will need to be able to support your entire workload on one box.
>
>
> Please, Can you explain me more ?
Well, if you have 2 systems, and one fails, then you presumably need to
be able to run everything you need one one box (or N-1 boxes, where N is
the total number of systems you have).
In general, running active/active is way more complicated to build,
support and troubleshoot than active/backup. Most likely, you think you
need load balancing, but you really don't. Or, if you do to support your
workload, then you're going to be having a bad day when you loose a system.
David
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