wait, the higher the reclamation value the more 'free' space on the tape.
So a reclamation value of 10% would mean that the tape would have to be
about 90% full of data or less to be reclaimed.
I usually wait until the reclaim percentage gets above 70 before I start.
With 3 tapes at 70% or higher I can reclaim them all onto 1 tape
(30+30+30=90) thus freeing up 2 tapes.

Mark


> -----Original Message-----
> From: Moir,Betsy [SMTP:betsy.moir AT ABBOTT DOT COM]
> Sent: Tuesday, June 15, 1999 1:31 PM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      Re: reclamation
>
> I read it to mean that when at least 10% of the data on the volume is
> reclaimable, reclaim the volume.
>
> In your scenario, though, the 90% wouldn't necessarily be empty it would
> just
> be filled with dead data - data that has been removed from the database
> because it has been deleted or aged past the time it was to be kept.
>
> My understanding of the purpose of reclamation (and believe me, IBM's way
> of
> looking at these percentage things is about as confusing as I can imagine)
> was to delete the actual data of the files that had already been removed
> from
> the database for whatever reason.
>
> Feel free to correct me if I'm wrong.  The one thing I know for sure is
> that
> when we drop the reclamation threshold to 10%, reclamation processes start
> up
> almost immediately.
>
> Luanne - I hope I'm not giving you false information.  My bet would be
> with
> Kelly, though,  since he's waaaaaaaaaay more experienced in and
> knowledgable
> about  the workings of ADSM than I am.
>
>
>
>
>
> ADSM-L AT VM.MARIST DOT EDU on 06/15/99 11:32:51 AM
> Please respond to lipp AT storsol DOT com @ INTERNET
> To: ADSM-L AT VM.MARIST DOT EDU @ INTERNET
> cc:
> Subject: Re: reclamation
>
> I thought the reclamation percentage meant the amount of useful data left
> on
> the tape.  So 10% means there is only 10% of the tape that has valid data,
> or in other words, 90% of the tape is empty.
>
> Kelly J. Lipp
> Storage Solutions Specialists, Inc.
> PO Box 51313
> Colorado Springs CO 80949
> 719-531-5926
> www.storsol.com
> lipp AT storsol DOT com
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
> Moir,Betsy
> Sent: Tuesday, June 15, 1999 7:09 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: reclamation
>
>
> Basically, as data becomes old or expired or deleted it is marked for
> reclamation,  and when ADSM reclaims tapes (it's sort of a merge/purge
> process), the "active" files on a tape are moved to another tape and the
> old
> tape is returned to the scratch pool.  This reclamation process is
> determined
> by a reclamation threshhold that is set in the stgpool definition -
> REC=999.
>
> To automate the reclamation process, we drop our reclamation threshhold on
> the weekend to rec=10 with an admin schedule.
>
> Define sched schedname type=admin cmd=Update stgpool stgpoolname rec=10.
>
> The reclamation threshold indicates how much reclaimable space a volume
> must
> have before ADSM reclaims the volume.  When it's set to 10, only 10% of a
> volume has to be expired, deleted or aged files.  We return the
> reclamation
> threshold to rec=100 during the week so that no reclamation takes place.
>
> More information about how to set up admin schedules and what levels
> reclamation thresholds should be set at can be found in the Admin Guide.
>
> Hope this helps.
>
>
>
>
> ADSM-L AT VM.MARIST DOT EDU on 06/15/99 07:50:48 AM
> Please respond to ADSM-L AT VM.MARIST DOT EDU @ INTERNET
> To: ADSM-L AT VM.MARIST DOT EDU @ INTERNET
> cc:
> Subject: reclamation
>
> Hi!
>         Just wondering if anyone can help me with reclamation,
> understanding
> what it is and how I can automate this?  All help is greatly appreciated.
> Thanks.
>
> Luanne R. Hancock
> J.D. Edwards
> 303-334-4843 office
> 303-334-4716 fax
> luanne_hancock AT jdedwards DOT com
>
>
>