[Linux-cluster] OCFS2 and SAN MultiPath I/O

[Joel Becker]

On Wed, Apr 22, 2009 at 04:10:37PM -0300, Flavio Junior wrote:
> On Wed, Apr 22, 2009 at 2:50 PM, Joel Becker <Joel.Becker at oracle.com> wrote:
> >
> >        What's the oops look like?  You shouldn't get an oops from a
> > path going down.  If you do, of course the machine is going to reboot -
> > it's in a broken state.  You're using RDAC, not dm-multipath, so I'm
> > betting you have to ask IBM why their multipath code is oopsing.
> >        As a short sanity check, make sure ocfs2 is mounted on the
> > multipath device, not a component path.
> >
> 
> Hi Joel, thanks for the answer...
> 
> OK, but i'm not sure about a kernel oops being executed.

	You mean there isn't an oops after all - I can see that from
your paste.  As your following email points out, it's actual fencing due
to the timeout configuration.

> I'd change panic_on_oops to 0 and it work "as expected" (well, you
> will see that I wasnt totally sincere about my setup. I'm using RHCS
> and gfs too :X)

	You should be able to use RHCS and gfs as well, as long as the
timeout and failure modes are managed correctly.

Joel

-- 

"You can get more with a kind word and a gun than you can with
 a kind word alone."
         - Al Capone

Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127