Re: separate owner/ORACLE_HOME for crs, ASM, and database in RAC environment

Hi, Bill,

I don't use asmlib because its dependency on linux kernel. I just create ASM diskgroups using RAW devices. when I login as oracle and start dbca, ASM disks are all look/work fine.

On Dec 12, 2007 5:14 PM, William Wagman <wjwagman_at_ucdavis.edu> wrote:

> Greetings,
>
> The thinking is to separate CRS, ASM and RDBMS for ease of maintenance.
> This is also the Oracle suggestion that each be in a separate home. It makes
> patching and upgrading easier.
>
> As to the disk issues. First are you using ASMLIB? Make sure if you are it
> is configured correctly and the disks have been created.
>
> Also look at the status of this disks as described in v$asm_disk. They
> status must be either provisioned or candidate. I have encountered this
> situation before where the status was unknown and that caused me problems.
>
> Also, are you using multipathing? If so make sure you have scanorder and
> scanexclude set correctly in the oracleasm file as that can affect things.
> There was a thread about this a while ago.
>
> I apologize for not being more specific but I still don't have a good
> enough understanding of how things work. A lot of what I have done is
> through trial and error and can give you things to look at but that's about
> it at this point.
>
>
> Bill Wagman
> Univ. of California at Davis
> IET Campus Data Center
> wjwagman_at_ucdavis.edu
> (530) 754-6208
>
>
> ------------------------------
> *From:* oracle-l-bounce_at_freelists.org [mailto:
> oracle-l-bounce_at_freelists.org] *On Behalf Of *Finn Jorgensen
> *Sent:* Wednesday, December 12, 2007 2:09 PM
> *To:* litanli_at_gmail.com
> *Cc:* oracle-l
> *Subject:* Re: separate owner/ORACLE_HOME for crs, ASM, and database in
> RAC environment
>
> Before trying to figure this one out, I'm trying to wrap my brain around
> why you would do that. What's the thinking behind this setup?
>
> Finn
>
>
> On 12/12/07, Li Li <litanli_at_gmail.com> wrote:
> >
> > Hi, List,
> >
> > I am testing to setup a 2-node RAC environment with separate
> > owner/ORACLE_HOME for crs, ASM, and database, it's 10gR2 on Redhat AS 4.
> >
> > 2 users are created: oracle and oraclex, oracle owns clusterware home
> > and ASM home, oraclex owns database home.
> >
> > first, I login as oracle and installed clusterware and database software
> > (in 2 different oracle home of course), configured and started ASM instance,
> > everything worked fine.
> >
> > second, I login as oraclex and installed database software, then I tried
> > to create a database using dbca, but I ran into error when I chose ASM as my
> > database storage, the error is:
> > "DBCA could not startup the ASM instance configured on this node. To
> > proceed with database creation using ASM you need the ASM instance to be up
> > and running. Do you want to recreate the ASM instance on this node?"
> >
> > But the ASM instance IS already running. I am guessing this must be
> > because of some permission issue but I am not sure what I am missing. I have
> > oracle and oraclex both have "oinstall" as primary group and "dba" as second
> > group.
> >
> > I googled but cannot find any useful information. Can anybody give me
> > some suggestion? Any comment would be greatly appreciated!
> >
> > Thanks,
> > -Li
> >
> >
> >
>
>

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