[Ocfs2-users] Re: [Fwd: FW: OCFS2 mounting question]

Fri Feb 22 00:55:58 PST 2008

On Thu, Feb 14, 2008 at 05:20:11PM +0800, wengang wang wrote:
> 
> 
> John Peeken, Database Installations wrote:
> >
> >
> >
> >*From:* Susan Smith [mailto:susan.g.smith at oracle.com]
> >*Sent:* Wednesday, February 13, 2008 10:56 AM
> >*To:* 'ocfs2-users at oss.oracle.com'
> >*Subject:* OCFS2 mounting question
> >
> >Hi,
> >  This is Susan in internals.     I am not in the 
> >ocfs2-users at oss.oracle.com <mailto:ocfs2-users at oss.oracle.com> mailing 
> >list, so please reply to me directly.
> > 
> > 
> > 
> >  I have a customer with an OCFS2 filesystem, and I question whether 
> >it is mounted correctly or not.   They are having sporadic corruption 
> >issues.
> > 
> >The volumes are mounted like this:
> > 
> >/dev/sdb                /data     ocfs2 
> >_netdev,datavolume,nointr       0 0
> >/dev/sdf                /data2     ocfs2 
> >_netdev,datavolume,nointr       0 0
> >/dev/sdc                /archcont  ocfs2 
> >_netdev,datavolume,nointr      0 0
> >/dev/sdd                /redo     ocfs2 
> >_netdev,datavolume,nointr       0 0

Adding Susan to the cc .. 

> > 
> >My questions are
> > 
> >1.  Per
> >NOTE.391771.1 
> ><http://webiv.oraclecorp.com/cgi-bin/webiv/do.pl/GET?WwwID=NOTE.391771.1&List=TAG&TAG.Idx=169> 
> >	OCFS2 - FREQUENTLY ASKED QUESTIONS
> >
> >it looks like these also need the 'noauto' option -- correct?
> >
> noauto -- wont' be mounted when 'mount -a',
> so, I think it should be determined by customers.

noauto is a good practice but we can survive without it..

> >2. And per
> >NOTE.359515.1 
> ><http://webiv.oraclecorp.com/cgi-bin/webiv/do.pl/GET?WwwID=NOTE.359515.1&List=TAG&TAG.Idx=174> 
> >	Mount Options for Oracle files when used with NAS devices
> >
> >they also need these options -- correct?
> >rw,bg,hard,nointr,rsize=32768,
> >wsize=32768,tcp,actimeo=0,
> >vers=3,timeo=600
> >
> except rw,  other options are for NFS/NFS4 mount.  no need for ocfs2.
> > 
> >3. If a ct mounts with the  _netdev option, does that always mean they 
> >are using a NAS device?
> >
> _netdev means when mounting, network should has been setup already.  for 
> devices that's via network should mounted with this options.

That does not mean NAS .. Per the o2net mechanism works on the network layer,
the ocfs2 filesystems should not be attemped to be mounted before the network
comes up .. That is simply why we need _netdev.
> 
Regards,
Oz
-- 

   if (argc > 1 && strcmp(argv[1], "-advice") == 0) {
          printf("Don't Panic!\n");
          exit(42);
   }
                         -- Arnold Robbins in the LJ of February '95, describing RCS