Re: Oracle upgrade without downtime??

  • From: kathryn axelrod <kat.axe@xxxxxxxxx>
  • To: nupendra@xxxxxxxxxxx
  • Date: Tue, 31 Aug 2010 11:51:23 -0700

This link might help:

I haven't done a rolling upgrade with RAC so I can't comment on that route,
but I did do one with DG and it worked great.

On Tue, Aug 31, 2010 at 11:21 AM, Upendra N <nupendra@xxxxxxxxxxx> wrote:

>  We have a 2 node Oracle RAC on, would like to upgrade
> Due to application SLA, I'm exploring the possibilities with no or least
> downtime for the upgrade.
> We'll have the binaries installed ahead of time on both the boxes
> to reduce the window.
> Assuming we could potentially get another 2-node RAC cluster, what are the
> choices we could use to avoid downtime?
> I can think of a couple of scenarios:
> 1. Oracle Streams setup to replicate both-ways and/or similar to
> Multi-master replication
> 2. We could do something similar with Golden gate - may be more expensive..
> Not sure if this will work:
> 1. Data guard with switchover
> Any other suggestions on reducing the upgrade window are appreciated.
> Thank you
> -Upendra

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