Tim,

Your analysis is correct... you only need the settings
as mentioned in the manual if you want to restore them!

In your case.. you have set up a technique that allows you to keep
full backups for longer... which provides a restore granularity
to a "weekly" timeframe for older backups... but a more
granular restore (daily) for more recent backups.

Thanks,

Del

----------------------------------------------------

"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 01/25/2005
02:41:36 PM:

> Thanks, Del:
>
> I'm just looking into this now ...
>
> The guide states:
>
> "When setting the value of the Retain Only Version parameter for
> incremental
> backups, the value must be (at a minimum) as long as the value set for
> the full backup objects to which the incremental backups are associated.
> You can use the same management class for incremental backups and the
> full backup objects (that are retained the longest) to be sure an
> adequate value is used."
>
> Now it states "must be as long as the value set for the full backup".
> Must it really?
>
> Because that is not what I want!
>
> I would want to setup a different management class for incremental
> backups that would keep only say 7 versions while this value is set at
> 35 for my full backups.
>
> I realize that the incrementals would not be able to be restored after
> the 7 days while the fulls would be.
>
> This suits what we want, we only want the incremental restore points in
> between our full backups for the last couple of days.
>
> Thanks,
>
> Tim Rushforth
> City of Winnipeg
>
> -----Original Message-----
> From: Del Hoobler [mailto:hoobler AT US.IBM DOT COM]
> Sent: Wednesday, October 06, 2004 2:23 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: Exchange Incremental Backup
>
> Tim,
>
> You can also set up different management classes for your
> incremental backups. Look in chapter 3 of the 5.2.1 User's Guide
> under a section titled:
>    "Data Protection for Exchange Version 5.2.1 INCLUDE/EXCLUDE
> Processing"
> It explains how to set this up.
>
> Thanks,
>
> Del
>
> ----------------------------------------------------
>
> "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 10/06/2004
> 11:36:24 AM:
>
> > We are using Data Protection for Exchange 5.2.1.0 to backup Exchange
> 2000.
> >
> >
> >
> > We currently do nightly Full backups and have the TSM policy with
> Retain
> > Extra Versions = Retain Only Versions = 35.
> >
> >
> >
> > We are looking into doing incremental backups throughout the day to
> provide
> > for better protection.  We currently have transaction logs and the
> Exchange
> > DB on separate physical disks both RAID10.  We would need a lot of
> drives to
> > fail to lose any data here - but we are also looking at recovering
> from
> some
> > type of logical corruption where both the logs and the DB are corrupt
> so
> we
> > would have to resort to the last backup.
> >
> >
> >
> > We really don't want or need to keep the incrementals that are done
> > throughout the day for more than a couple of days.
> >
> >
> >
> > It seems the way to do this would be to change Retain Only to say 2
> days
> but
> > leave Retain Extra at 35.  This way full backups would be kept for 35
> days
> > but incrementals would only be kept for 2 days.
> >
> >
> >
> > Does this make any sense?
> >
> >
> >
> > Is there any other way to do what we are trying to do?
> >
> >
> >
> > Are there downsides to this besides that any incremental that we do is
> no
> > good after 2 days?
> >
> >
> >
> > Thanks for any input.
> >
> >
> >
> > Tim Rushforth
> >
> > City of Winnipeg