Re: Oracle RAC and OGFS

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Greg,
You obviously know some of the shortcomings of ogfs, so I don't need to go=
=20
into those with you.

I'm not sure what Oracle does in the case where it is on a fs that supports=
=20
locks. I know it uses it's own internal locking when using ocfs or raw=20
partitions. If it uses it's own locking on ogfs, then you should be okay=20
performance wise (or if there is a way to make it use it's own locking). If=
=20
it tries to use the fs locking, you are going to be hurting. I'm not really=
=20
sure how to go about finding that out, but if it does try to use the fs=20
locking, the thing to do would probably be to use ogfs for the control file=
s,=20
etc. Then use raw partitions for the actual db. At least that's probably wh=
at=20
I would do.

=2D --Brian Jackson

On Friday 23 April 2004 5:48 pm, Greg Freemyer wrote:
> All,
>
> Has anyone tried Oracle RAC (9i or 10g) with ogfs?
>
> I want to put together a low-cost solution for experimenting with Oracle
> RAC?
>
> Also, since Oracle has its own lock manager for internal DB locking
> issues, is there any reason to think ogfs would have anything but good
> performance?
>
> ie. I think most of the ogfs performance issues revolve around
> functionality the Oracle would not use.
>
> Also, I know ocfs (Oracle Cluster File System) is available as GPL, but
> I don't think it has a lock manager at all, so it can only hold the
> database itself, not any of the associated programs and control files.
>
> That does not sound very friendly to me.
>
> Thanks
> Greg

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