Re: Single ASM instance for non-RAC and RAC instances in a node ?
- From: Dan Norris <dannorris@xxxxxxxxxxxxx>
- To: jayaraj rengarajan <jayaraj.rengarajan@xxxxxxxxx>
- Date: Wed, 21 Nov 2007 19:58:55 -0800 (PST)
Hi Jay,
I don't know that I've done it with DBCA, but I should expect it will be okay.
Technically, there's no reason why this should be a problem. Architecturally,
it's the same as if you took down the RAC instances, set cluster_database=false
and started one of the RAC instances.
Personally, I always recommend against running anything else on a RAC node if
there's any way to avoid it. From my experience, it just makes troubleshooting
a bit more difficult and even if the other instance isn't resource intensive,
if there are more moving parts on that node, there are that many more things
that can go wrong and possibly affect the node's availability. I suppose it's a
calculated risk, but a risk that can be avoided. While I do always recommend
against running other things on the RAC nodes, many sites still do it and I
suspect most of them are doing fine.
Dan
----- Original Message ----
From: jayaraj rengarajan <jayaraj.rengarajan@xxxxxxxxx>
To: Dan Norris <dannorris@xxxxxxxxxxxxx>
Cc: oracle_l <oracle-l@xxxxxxxxxxxxx>
Sent: Wednesday, November 21, 2007 8:44:38 PM
Subject: Re: Single ASM instance for non-RAC and RAC instances in a node ?
Dan:
If so, can we use +ASM1 (node1) while creating non-RAC instance in that node
using DBCA ? this instance will use DiskGroups mapped to +ASM1
In our Production landscape, we prefer not to host RAC database for smaller
application databases , which won't contribute much load on the server or
resource intensive.
Thanks
Jay
On 11/21/07, Dan Norris <dannorris@xxxxxxxxxxxxx> wrote:
Sure. Having clustered ASM instances doesn't stop you from using those
diskgroups for non-clustered databases.
The larger question is: Why would you compromise the RAC instance on that node
by making it compete for resources with some other instance? As we've reviewed
multiple times here, Oracle's resource manager operates within an instance, not
across instances on the node. So, you've got little ability to ensure that the
RAC instance gets what it needs in this case.
Dan
----- Original Message ----
From: jayaraj rengarajan <
jayaraj.rengarajan@xxxxxxxxx>
To: oracle_l <oracle-l@xxxxxxxxxxxxx>
Sent: Wednesday, November 21, 2007 7:38:49 PM
Subject: Single ASM instance for non-RAC and RAC instances in a node ?
List Members:
Can I map a non-RAC instance to a ASM instance (+ASM1 in node1 or +ASM2 in
node2) which is already configured for RAC instances ?
We are running 10.2.0.2 in Linux RHEL 4.
Thanks
Jay
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