I'd be interested in being copied on any replies to Eric, this is an area
which interests me as well.

> ----------
> From:         Eric Winters[SMTP:ewinters AT AU1.IBM DOT COM]
> Reply To:     ADSM: Dist Stor Manager
> Sent:         16 March 2000 04:54
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      Re: reclamation of off-site volumes
>
> My experience of the reclamation of off-site volumes doesn't quite match
> up
> with my understanding of how it should work. Perhaps someone can shed some
> light on what's really going on.
>
> I'm starting reclamation at 10:00 by reducing the reclaim value from 100
> to
> 50.
> I run the following select statement to determine how many volumes are
> eligible for reclamation at this time.
>
> select count(volume_name) as "Number of vols" ,stgpool_name from volumes
> where pct_reclaim>50
> group by stgpool_name'
>
> For my offsite pool I see there are 30  volumes which are truly offsite
> which are eligible (and I also prepare a list of their volume_names).
>
> (My expectation at this point is that a single process will run which will
> reclaim ALL eligible volumes)
>
> Time passes and at 16:00 the reclaim value is reset to 100. The reclaim
> process faithfully continues its work which is to be expected. When it
> finishes 3 hours later I expect to see that there are no eligible volumes
> left. But in fact there are 8 eligible volumes (ie reclaim>50) which were
> present in my morning list. The process has finished without reclaiming
> all
> eligible volumes. And it wasn't cancelled.
>
> Can anyone help explain what's going on here?
>
> Regards,
>
> Eric Winters
>
>
> Joe Faracchio <brother AT SOCRATES.BERKELEY DOT EDU> on 14/03/2000 11:19:24
>
> Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>
> To:   ADSM-L AT VM.MARIST DOT EDU
> cc:    (bcc: Eric Winters/Australia/Contr/IBM)
> Subject:  Re: reclamation of off-site volumes
>
>
>
>
> The behaviour I've seen says that it can go for a longer time than just
> 9-5 if you set the number too low or too "into" the chain. Especially if
> the number chosen is not the tape with the most to be reclaimed.
>
> I do :
>
>    select volume_name,pct_reclaim,status,pct_utilized -
>    from volumes where stgpool_name='COPYPOOL' -
>    and pct_reclaim>$1 -
>    order by pct_reclaim desc
>
> where $1 is some number like 20 or 30  and then 'dive in' about 10 down.
> The logic in ADSM causes all tapes down to this number to be reclamated
> simultaneously.  If you TAPEPOOL is collocated then the offsite
> reclamation should be more efficient read each onsite tape once to
> reclamate the offsite information.
>
>      joe.f.
>
>
> Joseph A Faracchio, Systems Programmer, UC Berkeley
> I
>
> On Mon, 13 Mar 2000, Walter, Jeannine wrote:
>
> > This is one of those duh questions but here goes anyway.
> > I want to run reclamation of our off-site tapes during the day from 9AM
> > until 4PM.  How do I do this?  By a script that runs as an admin
> schedule?
> > Anyone have a script they can share?
> > Thanks.
> >
> > Regards,
> > Jeannine Walter
> >
> > Purina Mills, Inc.
> > St. Louis, MO
> > 314-768-4181
> > Jeannine_Walter AT Purina-Mills DOT com
> <mailto:Jeannine_Walter AT Purina-Mills DOT com
> >
> >
>