Hello Johan,

I think you should use a separate nodename for your Monthly backups. This
would avoid the rebinding of every file to the changed management class.
Apart from taht possibility, you should consider ARCHIVING once a month with
retention of 2 years. You will then avoid mixing versions.

Regards,

Rene Lambelet
Nestec SA - 55, Av. Nestle - CH-1800 Vevey
Tel: ++41'21'924'35'43 / Fax: ++41'21'924'45'89
E-Mail: rene.lambelet AT nestle DOT com



> -----Original Message-----
> From: Johan Gouws [SMTP:JohanG AT HOLLARD.CO DOT ZA]
> Sent: Wednesday, October 13, 1999 10:57 AM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      Slow restores
>
> Hi all
>
> I have seen a lot about slow restores on this group but had first class
> experience on this last week. A hard disk in one our file servers crashed.
> It is a 8.4 Gig drive with compression turned on which gave us approx
> 12gig
> of data that needed to be restored. We have done a lot of directory and
> SQL
> database restores and have been able to restore 25gig in +- 2 hours.
> Because
> this is a medium shop we currently use one DLT 2700 auto library for the
> backups.
> We take daily incremental backups which we keep for 60 days and a full
> monthly backup which are kept for 2 years.
>
> The disk crashed on Monday morning and a full backup was taken on the
> Sunday. We started the restore of all active files and directories and the
> first tapes that were used to backup the node was recalled. We mounted 83
> cartridges and it took 29 hours to restore the drive.
>
> Our backup server is running NT and the client is NT as well. ADSM is on
> V3.
> The backup server hardware config is dual P11 350 with 512MB ram. The time
> constraint in this case was library. I calculated that the actual data
> transfer time was about two hours and the rest of the time was checkin and
> out as well as search times.
>
> A bigger magstar or ATL library is in our long term strategy but
> management
> has asked me to investigate other possibilities off decreasing the restore
> times.
>
> Why did ADSM rebuild the drive from a total of 83 tapes and not from the
> monthend backup tape. Would a point in time restore have made a
> difference.I
> thought that a restore of the active files would go back to when the last
> backup of that file was taken.
>
> We have been on ADSM for about a year and a half but this was the first
> time
> we needed to restore a whole user directory(46000 files).
>
> Our biggest file server consists of about 280 000 files and I don't know
> how
> long this will take.
>
> Any suggestions on this? Our full monthly backup is run with a different
> policy set and according to backup stats do backup 99% of the files on the
> drive, but it did not ask for the monthly tape during the restore.
>
>
> Johan Gouws
> Johang AT hollard.co DOT za <mailto:Johang AT hollard.co DOT za>