Re: Availability during software/hardware upgrade.

From: Howard J. Rogers <howardjr2000_at_yahoo.com.au>
Date: Wed, 30 Oct 2002 06:10:22 +1100
Message-ID: <mWAv9.65258$g9.183303@newsfeeds.bigpond.com>

"Stu Charlton" <stuartcharlton_at_hotmail.com> wrote in message news:f8851c43.0210290540.b32225d_at_posting.google.com...
> "Howard J. Rogers" <aldeburgh_at_bigpond.com> wrote in message
news:<8kit9.59670$g9.169403_at_newsfeeds.bigpond.com>...
>
> > Another idea would be to use RAC (Real Application Clusters). You could
> > have a two node RAC, take one of the nodes offline to patch it/upgrade
> > it/whatever, and then bring it back into the cluster. Do the same on the
> > other node, and you achieve truly non-zero downtime for the cluster as a
> > whole. Again, however, you can't cluster a Windows box with a Unix one,
so
>
> Is this new in 9iR2? I was under the impression from the Oracle 9i
> RAC course that you can't do a rolling cluster upgrade like this - the
> whole cluster must be the same version.
>

I wouldn't want to try an upgrade from 8i OPS to 9i RAC like this, but a patch from 9.0.1.1 to 9.0.1.2 would almost certainly be OK. So no, it's not new in 9iR2, but there are tolerances.

Regards
HJR
> Cheers
> Stu
Received on Tue Oct 29 2002 - 13:10:22 CST