On Monday 15 January 2007 16:57, Arno Lehmann wrote:
> Well, the usual setup I use when backing up to disk is to allow a fixed
> number of volumes per pool, configure three pools - one for Full, one
> for Diff, one for Incr backups - with retention times according to what
> my customer needs, and have the volumes limited in size.
Yes, I think that is pretty similar to how I currently have things going, but
it seems a bit wasteful of disk space, and to require interferance if the
space requirements for backups change over time.
> That achieves what you want, if I understood you correctly: I limit disk
> space use, I can burn the volumes to DVD once they are in state Used,
> and automatic expiry works correct. With some thinking and some
> experiments it's usually possible to find settings for the volume size
> and number that ensure one or two purged volumes during normal
> operation. Using small volume file sizes, the amount of space wasted can
> be rather small.
<snip>
> > Schedule {
> > Name = "WeeklyCycle"
> > Run = Full 1st sun at 1:05
> > Run = Differential 2nd-5th sun at 1:05
>
> Hmmm. Sundays. That can mean that, during problems, your backups don't
> run until the operator comes back to work on Monday. I prefer Tuesdays.
> If I get paid for observing backups I set up Fridays or Saturdays, too,
> but not Sundays :-)
Not a bad point, but Sunday is one of our few slow days.
> > Pool {
> > Name = FullPool
> > Pool Type = Backup
> > Recycle = yes # automatically recycle
> > Volumes
> > AutoPrune = yes # Prune expired volumes
> > Volume Retention = 6 months
> > #Maximum Volume Jobs = 1
> > Label Format = Full-
> > Maximum Volumes = 120
> > Maximum Volume Bytes = 4831838208 # 4.5GB
>
> Ok. You recognize you'll need up to 540 GB for this pool alone? I hope
> you have reliable RAID hardware underneath the storage disk volume...
Yes, part of why being effictive with space used for the backups is so
important.
I actually need about that much space for 6months of full backups.
Thanks for the pointers and your reply!
Leah
--
Leah Kubik : m416-559-6511 : www.heinous.org
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