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тАО11-03-2009 02:23 AM
тАО11-03-2009 02:23 AM
Oracle Data Guard 10g solution in a MC Service
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тАО11-03-2009 03:30 AM
тАО11-03-2009 03:30 AM
Re: Oracle Data Guard 10g solution in a MC Service
What would be the purpose of this setup? It seems right to me (in this case) the use of the Oracle Data Guard only if you would have another 2 HP-UX servers with ServiceGuard. Or loose the cluster setup in order to break free the nodes - which is not a very good idea.
Best regards,
Horia.
Horia.
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тАО11-03-2009 05:45 AM
тАО11-03-2009 05:45 AM
Re: Oracle Data Guard 10g solution in a MC Service
For me it comes down to, not how to implement these together, but who do you want to handle the failover, Oracle or HP.
If you want Oracle to handle things, then having MC/SG is not financially prudent.
However, if you have more going on than just Oracle on that box, or if your cluster is far more robust requiring more than one failover, than Oracle DataGuard may not be the one you want to rely on.
So before trying to figure out how to do something, figure out if you even should.
Kindest regards,
Rita
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тАО11-03-2009 05:48 AM
тАО11-03-2009 05:48 AM
Re: Oracle Data Guard 10g solution in a MC Service
And if you're running a standby database, wouldn't that mean you have to have disks for that standby database? So, if I got this right your disk requirement for Oracle DataGuard is double that of MC/SG which uses the same disk and simply turns them over to the failover node in the event of a failure.
Another cost to consider.
/rcw
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тАО11-03-2009 07:01 AM
тАО11-03-2009 07:01 AM
Re: Oracle Data Guard 10g solution in a MC Service
I presume you mean running dataguard from the database instance that is in the Serviceguard cluster to another database instance somewhere else (in another entirely seperate cluster or standalone?)
What you have discovered is that Dataguard Broker doesn't work in a Serviceguard cluster (in fact it won't work in any non-Oracle cold failover cluster including VCS, Sun Cluster or IBM HACMP). If you're not happy with this I suggest you raise an enhancement request with Oracle (if that will do any good).
Of course you don't _have_ to use Dataguard Broker to run Dataguard - if you are happy to control Dataguard using purely SQL commands through sqlplus rather than DG broker commands through dgmgrl then it will work just fine in a Serviceguard cluster and I've done this myself. You'll find this method of management is not as straightforward and you also won't be able to manage Dataguard through Oracle Enterprise Manager - but it works...
HTH
Duncan
I am an HPE Employee