Hi,

If you use HP vxfs (OnlineJFS) snapshot feature, you need one lvol per
fs, but you don't have to split your mirroring.  Lvol size demand depends
on your system activity during the backup.

OM can be suspended for a moment of doing snapshot i.e. about 60 -120
sec, so users see only their client to freese for a moment.

Timo Heinonen
++++++++++++++++


> "Mauro M. TINELLI" wrote:
> >
> > Werner,
> >
> > I backup three OM servers every night (17GB, 42GB and 66GB of
OMstore).
> >
> > On all of them, I:
> >
> > - stop the OM services,
> > - split the mirrored copy of the OM FSs,
> > - restart the OM services,
> > - backup incrementally the copy /var/opt/openmail,
> >   /var/opt/openmal/data...
> >
> > and
> >
> > - finally I merge the FSs again!
> >
> > I do use incremental backup. The consistency is garanteed by the fact
> > that all the services have been stopped, before the splitting of the
FS.
> > By the way, I was using OmniBack-II before and I moved to ADSM
because
> > the "always incremental" policy reduces the backup time.
> >
> > It works ... and the restore too!
> >
> > Ciao Mauro
>
> Ciao Mauro
>
> Thanks a lot for your informations. How long have the OpenMail services
> to be down (how long are the servers not available)?
>
> Thank you for your info
> Regards
> Werner Nussbaumer
Timo Heinonen
Unix Team Manager               Timo.Heinonen AT nmp.nokia DOT com
Nokia Mobile Phones             Tel:     +358 10 505 2364
PL 86                           Fax:     +358 10 505 2899
24101  SALO                     GSM:     +358 40 582 8806
FINLAND
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++