Re: Is ANYONE using synchronous replication?

Uhh! Ugly.

So is it machine failure only you're trying to protect against, or site failure? (I assume you realize HA clusters are no use for site failure protection). What are they going to use for that?

Pete

Yosi Greenfield wrote:

> Thanks Pete,
>
> The requirement for synch is that, in case of failover, we want every
> transaction to show up in the failover database as soon as it takes over. We
> would have to break the rep group as soon as we find out one machine is not
> responding. Then, send all traffic to the machine that's up. Resync later,
> thank you.
>
> It's a pain, and I'm really trying to dissuade this. I may end up sending
> them to an HA cluster (Solaris HA, IBM HACMP, HP ServiceGuard type thing..)
> and HA disks. Better than using replication for HA failover. (ANYTHING is
> probably better than that!)
>
> I'll try my sales rep. Thanks for trying.
>
> Yosi
>
> Pete Sharman wrote:
>
> > Yosi
> >
> > I'm not too sure how you're planning to use synchronous replication for
> > failover. It REQUIRES the two systems to be available, otherwise DML
> > will fail.
> >
> > I tried to have a look for referencable customers, but every site I found
> > with this sort of information only listed replication, not the type of
> > replication. Of course, I'm not in sales so I might not be looking at
> > the right place! Try bouncing the question off your sales rep to see if
> > they know more about where to go.
> >
> > Pete
> >
> > Yosi Greenfield wrote:
> >
> > > Hi All,
> > >
> > > Is anybody out there using synch rep? If so, is anyone using it for
> > > failover?
> > >
> > > Oracle doesn't usually suggest it. We're thinking of implementing it
> > > here, and the Oracle support rep indicated that in four years we were
> > > the first synch rep question he'd gotten - all his questions are on
> > > asynch rep.
> > >
> > > (Pete, can you find out if you have any references available running
> > > synch rep?)
> > >
> > > Thanks,
> > >
> > > Yosi
> > > yosi_at_newsalert.com
> >
> > --
> > Regards
> >
> > Pete

--
Regards

Pete

Received on Fri Jul 30 1999 - 16:43:11 CDT