[Ocfs2-users] OCF2 and LVM

[Nuno Fernandes]

On Monday 08 October 2007 21:01:58 Jordi Prats wrote:
> Hi,
> You could use clvm (cluster LVM):
> http://sources.redhat.com/cluster/clvm/ to do snapshots on a clustered
> environment.
Snapshots are not supported in clvmd. Maybe in RHEL5 update 2.

Regards,
Nuno Fernandes


> You need to setup the RedHat cluster infrastructure, but this shouldn't
> be a problem.
>
> I agree that rman is the correct solution to oracle backups :)
>
> regards,
> Jordi
>
> Alexei_Roudnev wrote:
> > I dont knoiw any lvm technology which can make a snapshort in clustered
> > environment, so better forget this idea.
> >
> > Recommended method to do oracle backups is rman. Any violation of this
> > brings you into the swamp of possible oracle bugs.
> >
> >
> > ----- Original Message ----- From: "Jordi Prats" <jprats at cesca.es>
> > To: "Riccardo Paganini" <riccardo.paganini at solveit.it>
> > Cc: <ocfs2-users at oss.oracle.com>
> > Sent: Monday, October 08, 2007 11:20 AM
> > Subject: Re: [Ocfs2-users] OCF2 and LVM
> >
> >> Hi,
> >> I'm not an expert on oracle, but I don't think using a snapshot is a
> >> recommended backup solution. You should use data pump or exp utilities
> >> to backup your database.
> >>
> >> To extend your fs, tune2fs.ocfs2 requires you to umount it, according
> >> to it's man page:
> >>
> >> ==
> >> tunefs.ocfs2 is used to adjust OCFS2 file system parameters on  disk.
> >> In order to prevent data  loss,  tunefs.ocfs2  will not  perform any
> >> action on the specified device if it is mounted on any node in the
> >> cluster.  This tool requires the O2CB cluster to be online.
> >> ==
> >>
> >> The concrete command should be: tune2fs.ocfs2 -S /dev/LVM_volume
> >>
> >> I don't know if there's any way to extend it without umounting it.
> >>
> >> If you want to extend your fs without umounting it you should use ASM
> >> instead of OCFS2.
> >>
> >> regards,
> >> Jordi
> >>
> >> Riccardo Paganini wrote:
> >>> Does anybody knows if is there a certified procedure in to backup a
> >>> RAC DB 10.2.0.3 based on OCFS2 ,
> >>> via split mirror or snaphots technology ?
> >>>
> >>>
> >>> Using Linux LVM and OCFS2, does anybody knows if is possible to
> >>> dinamically extend an OCFS filesystem,
> >>> once the underlying LVM Volume has been extended ?
> >>>
> >>> Thanks in advance
> >>> Riccardo Paganini
> >>>
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> >>
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