Reclamation will only put files from the same node together if you have
collocation on.  And, it will mix inactive and active backups onto the same
tape.

Tina

> -----Original Message-----
> From: Richard C. Dempsey [SMTP:dempsey AT KODAK DOT COM]
> Sent: Tuesday, March 16, 1999 11:20 AM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      Re: restore times
>
> Are you reclaiming tapes?  When ADSM reclaims tapes, it tries to put
> files from the same nodes together.  Frequent reclamations will tend
> to consolidate files on a small number of tapes.
>
> If you can't consolidate, say because you only have one tape drive
> in your library, then our local ADSM guru recommends taking occasional
> full backups.  You would do this not with a selective backup, but with
> an ABSOLUTE mode INCREMENTAL.  This is an attribute of the backup copy
> group, so you would use something like
>
> UPDATE COPYGROUP domainname setname classname STANDARD TYPE=BACKUP
> MODE=ABSOLUTE
>
> After the backup is done, reset the mode to MODIFIED:
>
> UPDATE COPYGROUP domainname setname classname STANDARD TYPE=BACKUP
> MODE=MODIFIED
>
> Rich
>
> At 10:33 AM 3/16/99 -0500, you wrote:
> >It appears to me that one of the problems with restores taking so long is
> >that the incremental nature of ADSM will, over time, spread the required
> >files over many volumes in a tape storage pool.  Requiring mounts, and
> >searches, of multiple tapes requires a lot of time.
> >
> >Has anybody tried, say once a month, performing selective backups for
> entire
> >file systems in an effort to aggregate all the files required for a
> restore
> >in reasonable proximity to each other?   Incremental backups would then
> get
> >scattered but it may limit the number of tapes that would be required.
> >Would this help the restore time problem?
> >
> >I'm considering such an idea and was wondering if anybody has had any
> >similar experiences that may help.
> >
> >Tom Fluker
> >Tom.Fluker AT viasystems DOT com
> >
> >
>
> Richard C. Dempsey                 email: dempsey AT kodak DOT com
> Public Online Services             pager: 716-975-3539
> 11th Floor, Bldg 83, RL            phone: 716-477-3457
> Eastman Kodak Company
> Rochester, NY 14650-2203