Re: SRDF and oracle

On Sep 16, 5:35 pm, "KCS" <K..._at_hotmail.it> wrote:
> "hpuxrac" <johnbhur..._at_sbcglobal.net> ha scritto nel messaggionews:1189960777.836533.131830_at_g4g2000hsf.googlegroups.com...
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> > On Sep 16, 9:42 am, "KCS" <K..._at_hotmail.it> wrote:
> > > Did somebody used the EMC technology called "SRDF" (SRDF/A) with oracle
> for
> > > a disaster recovery site ?
>
> > > Let me know. From metalink the not synchronous modes does not seem to be
> > > supported.
>
> > > Bye
>
> > Oracle supports SRDF both synchronous and asynchronous ...
>
> > Sites using synchronous are "up to date" with all changes from the
> > sending system. Where do you see the impact the most on an oracle
> > system?
>
> > Well it's in an event "log file synch". The impact of running in
> > synchronous mode can be considerable ...
>
> > In asynch mode the EMC syms ( or DMXs or clarions whatever ) keep
> > track of things that have been changed but not yet propagated. They
> > do preserve the order in which tracks that have been changed are sent
> > across ... preserving the order is the crucial part that makes it a
> > supported technology from the oracle side.
>
> > In asynch mode you risk losing some small amount of things ( depending
> > on available bandwidth and how fast redo log entries are being
> > generated ) in a DR mode so this needs to be negotiated and
> > understood.
>
> The question is:
> -EMC told us what you have just said, it works, the order in writing is
> respected, ecc.
> -Oracle says (contacted): we cant certificate asinchronous. (we have RAC an
> ASM on source).
> I think they do not want to have the responsabiluty and want us to use
> Dataguard.
>
> We do not want to find ourself in troble with the EMC solution but no oracle
> support.
> What do you think about ?
> Thanx

I think there a lot of people in oracle support giving out bad recommendations.

I know RAC and EMC asynch is supported by both oracle and EMC. Does ASM change that? I don't think so but it's conceivable I guess ... you could ditch ASM perhaps.

Do some more research on metalink and get someone more knowledgeable to work on your sr. Received on Sun Sep 16 2007 - 17:55:52 CDT