[OpenAFS] Howto speedup the restore of a crashed fileserver

[Jose Calhariz]

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On Mon, Oct 01, 2007 at 04:15:04PM -0400, Jason Edgecombe wrote:
> Jose Calhariz wrote:
> > On Mon, Oct 01, 2007 at 11:25:03AM -0700, Russ Allbery wrote:
> >  =20
> >> Jose Calhariz <jose.calhariz@tagus.ist.utl.pt> writes:
> >>
> >>    =20
> >>> I have lost a fileserver because of a corruption on the reiserfs v3.
> >>> Something like 1000 volumes and 100GB of data were lost.  The backups
> >>> were made using amanda with standard tar.
> >>>      =20
> >>> My problem is the recovering of the data to the surviving filesystem
> >>> is taking too much time.  Something like 7 hours to recover 7 GB.
> >>> Will I need 100hours to recover from tar 100GB?
> >>>      =20
> >> What did you tar up?  I can think of a lot of possibilities (the raw n=
amei
> >> filesystem, the contents of AFS archived with admin credentials, tarba=
lls
> >> of volume dumps), and the answer somewhat depends.
> >>    =20
> >
> > I have tarballs with the contents of AFS using admin credentials.
> >
> >  =20
> >> If you've archived AFS via tar using admin credentials, I'm not sure
> >> there's anything you can do that's faster than creating new volumes and
> >> untarring the contents into those volumes.  You can do that directly on
> >> the relevant file server to reduce your network latency a little.
> >>
> >>    =20
> >
> > OK
> >
> >  =20
> If you're not already, I recommend restoring into a local directory,
> then copying into AFS. That will at least make the tape part go faster
> and reduce wear and tear on the tapes and drive.

I am doing that,  As I can recover from tapes faster than I can write to
AFS.  Specially because I use virtual tapes on disks.

>=20
> Jason
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>=20

    jos=E9 Calhariz

--=20
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