Re: EMC storage replication
- From: Jack van Zanen <jack@xxxxxxxxxxxx>
- To: softice@xxxxxxxxx
- Date: Tue, 21 Dec 2010 12:18:17 +1100
"With Dataguard the process of switch or failover to the standby database is
more clear and it's initiated by the database administrators." -agree
When the proverbial excrement hits the proverbial fan and the database
won't start, the dba team will get the call at 3 am to fix things while the
SAN team maintain all is peachy and replicated (and it may very well be)
Bottom line is, if I can get a call to fix the issue with a database down
early in the morning I like to be in control of as much of the technology
used. Dataguard would be my preferred.
Jack van Zanen
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Thank you for your cooperation
On Fri, Dec 3, 2010 at 3:39 AM, Svetoslav Gyurov <softice@xxxxxxxxx> wrote:
> Hi Goran,
>
> As William pointed out the EMC is not aware what happens with the database,
> it's replicating blocks from one site to other. Also choosing technology
> depend on the purpose, if your purpose is to have no or zero downtime and
> don't want to loose a single transaction you'll probably go with Dataguard
> and synchronous replication. What's more if you start Active Dataguard
> corrupted blocks on the primary will be corrected by the standby database
> once they reached there. Also running Active Dataguard gives you the ability
> to use is for a reporting purposes and redirect DMLs to the primary
> database.
>
> On the other hand EMC SRDF could be used to replicate not only Oracle
> databases, but all other services, it's storage-to-storage replication. If
> you go with SRDF you could create a snapshot of the replicated disks and
> start the database for test purposes or for any other purposes. I'll be
> doing the same exercise next week just for tests, but with HP Continuous
> Access. We are running also Dataguard which is the primary disaster recovery
> solution.
>
> With Dataguard the process of switch or failover to the standby database is
> more clear and it's initiated by the database administrators.
>
> Either case share your experience once you finish building your disaster
> recovery scenario.
>
> Regards,
> Sve
>
>
>
> On 12/02/2010 02:58 PM, goran bogdanovic wrote:
>
> Hi all,
>
> at the place where I work, management would like to implement EMC
> Replication (as we have EMC SAN's) for our databases between two Data
> Centers instead of DataGuard for certain DB-systems.
> According to EMC sales, the process is certified by Oracle although I
> didn't find any reference on Metalink (could be also, I didn't search it
> well).
> If someone (out there ;-) ) is already using it, I would appreciate if you
> could tell me your experiences and possible pitfalls regarding
> implementation.
>
> Best Regards,
> Goran
>
>
> -- //www.freelists.org/webpage/oracle-l
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