Re: Can I Have a 9i RAC and a 9i non-RAC Instance on Same Machine?

Pete,

thanks for the information. The Shareplex / Replication is planned from the non-RAC instance on server A to the non-RAC instance on server B.

Basically, we have 2 similar applications that perform similar functions, but we don't currently have the time or resources to combine them into one. One app uses OPS/RAC and the other doesn't, but we feel they are similar enough and small enough that we can co-exist them on the same server, barring any technical limitations. The RAC-based application has built-in failover, the non-RAC doesn't, hence the need for Shareplex / Replication.

Thanks.
Roy

Pete Sharman <peter.sharman_at_oracle.com> wrote in message news:<aabomo0jhi_at_drn.newsguy.com>...
> In article <498db9a0.0204260440.616bfdba_at_posting.google.com>, rspeaker_at_yahoo.com
> says...
> >
> >I have 2 IBM P680 servers, clustered. Is it possible to have 1 RAC/OPS
> >instance
> >and 1 non-RAC/non-OPS instance on each server, running at the same
> >time,
> >assuming I have sufficient CPU & memory resources, and separate the
> >I/O
> >correctly? Are there any limitations in 8i / 9i / OPS / RAC that would
> >prevent
> >this?
> >I would like to have Server A (instance A) and Server B (instance A)
> >in a RAC
> >or OPS configuration, and Server A (instance B) and Server B (instance
> >B) in a
> >non-RAC / non-OPS configuration, but running SharePlex / Replication.
> >Is this possible, and if so, is it supported by Oracle?
> >
> >Thanks.
> >Roy Speaker
> >rspeaker_at_yahoo.com
>
> Well you have a couple of different combinations here. Let me outline each one
> that is supported:
>
> 1. both OPS and non-OPS
> 2. both RAC and non-RAC
> 3. OPS and non-RAC
> 4. non-OPS and RAC
>
> Proviso for all of these is that OPS/RAC is supported on the cluster you're
> talking about. Only concern would be the resources of the machines are
> sufficient.
>
> Now add replication into the picture. Replication from Oracle is supported in
> all 4 cases. I'm assuming here you're going to replication to another machine
> that is not in the cluster - don't laugh at me making this explicit. I had one
> client that has set up replication from one node of the cluster to another node
> becasue they hadn't heard of OPS (this was in the 7.3 days). You may want to
> ensure the replication is done from the correct node to minimize pinging.
>
> Two final points. I believe (though I'm not 100% sure) that Oracle does NOT
> support Shareplex because it uses log mining without using Oracle's LogMiner.
> Second one - if you have the choice, don't even bother with OPS. RAC is a lot
> easier to get scalability out of. It's possible to make OPS scale, but in some
> cases it can be quite difficult.
>
> HTH. Additions and corrections welcome.
>
> Pete
>
> SELECT standard_disclaimer, witty_remark FROM company_requirements;
Received on Fri Apr 26 2002 - 18:30:13 CDT