RE: Multiple ASM instances on the same box

From: Bobak, Mark <>
Date: Fri, 20 Nov 2009 16:40:16 -0500
Message-ID: <>

Hi Martin,

I stand corrected.

I think what I was (incorrectly) remembering, was actually the case where you run two ASM instances on the same server, from the same ORACLE_HOME. In that case, you need to set one ORACLE_SID to something other than '+ASM', and there's an undocumented parameter that you set on the database looking for ASM storage, that tells it, "don't use '+ASM' for the ASM instance name, use this other name instead". I don't remember the name of the undocumented parameter....but that's what I was thinking of.

But, bottom line, ASM and clusterware are both backward compatible, so, I stand by my comment that I can't really think of any reason you'd want to run more than one ASM (or more than one clusterware, if it's RAC) on the same server.

It all comes back to the KISS philosophy....(keep it simple....)


-----Original Message-----
From: Martin Berger [] Sent: Friday, November 20, 2009 3:43 PM
To: Bobak, Mark
Cc:; oracle Freelists Subject: Re: Multiple ASM instances on the same box


I'm sure, it IS supported, as long as you do not run in a cluster. and there are no undocummented parameters. just use unique DB_UNIQUE_NAME to avoid ORA-15150.
(just to clarify)
but I'm with you, I will NOT recommend more than 1 ASM on a node.


Am 20.11.2009 um 17:43 schrieb Bobak, Mark:

> It is possible, but not supported. There are some undocumented
> parameters involved. But, you shouldn't have to. Both clusterware and
> ASM are backward compatible. Just run 11g clusterware and 11g ASM, and
> you should be fine running 10gR2 and 11g databases. And, it's fully
> supported.

Received on Fri Nov 20 2009 - 15:40:16 CST

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