Re: Any comments on database/file system storage options?

From: Matthew Zito <mzito_at_gridapp.com>
Date: Thu, 18 Jun 2009 19:35:00 -0400
Message-ID: <A5B42E4A-9694-47AA-8DE5-C1D7AFAD8643_at_gridapp.com>

Gfs is a *much* heavier filesystem, and requires interaction with the physical hardware for node fencing. So you either need a supported San switch/storage array or a supported ilo card or you have to write your own fencing module.

Gfs scales much larger than ocfs2 for the same reason (up to hundreds ofnodes in one filesystem), but it's overkill for a rac cluster. Plus, oracle writes ocfs2, so if you run into a bug oracle will fix it - with gfs you'll need to fight red hat.

Matt

On Jun 18, 2009, at 11:23 AM, "Maureen English" <sxmte_at_email.alaska.edu> wrote:

> That is exactly what our problem is. It isn't supported...and we
> can't
> afford to not have this system unsupported.
>
> Oracle support told us that the supported configuration is CLVM with
> GFS,
> but GFS costs money. So, we're looking for the solution with OCFS2.
>
> Apparently, our version of OCFS2 needed to be patched.
>
> - Maureen
>
>
>
> LS Cheng wrote:
> > You have OCFS2 on LVM2?
> >
> > That is not supported either in single node or clustered AFAIK but
> if
> > you use the lvm2-cluster package I think it is (you better open a
> SR).
> > With a supported CLVM you can perform online resizing.
> >
> > Thanks
> >
> > --
> > LSC
> >
> >
> >
> >
> > On Wed, Jun 17, 2009 at 7:56 PM, Maureen English <sxmte_at_email.alaska.edu
> > <mailto:sxmte_at_email.alaska.edu>> wrote:
> >
> > Hi,
> >
> > We have 3 RHEL5 machines and are trying to decide how to
> correctly
> > configure
> > them as a clustered system that will run a variety of
> applications,
> > as well
> > as many Oracle databases.
> >
> > Oracle tells us that the only options are ASM or CLVM with GFS.
> > Isn't ASM
> > only for Oracle databases, though?
> >
> > We are currently at release 10.2.0.4.0 for our Oracle databases.
> >
> > Any comments?
> >
> > Note that we currently have these 3 machines set up with LVM2
> and Oracle
> > Clusterware, but are not running any RAC databases, just
> single instance
> > databases. The problem we've run into is in trying to resize
> the LUNs.
> >
> > - Maureen (not a sysadmin....)
> >
> >
> > --
> > http://www.freelists.org/webpage/oracle-l
> >
> >
> >
>
> --
> http://www.freelists.org/webpage/oracle-l
>
>

--
http://www.freelists.org/webpage/oracle-l

Received on Thu Jun 18 2009 - 18:35:00 CDT