In 5.2 and below,
Offsite Reclamation is handled differently than onsite.

Onsite reclamation starts with the most-reclaimable tape (99.9) and does
them one at a time.

Reclamation for tapes marked OFFSITE (usually your copypool) is
different.
Since TSM must mount the ONSITE/primary pool tapes to do the reclaim, it
tries to make sure each input tape is mounted only ONCE.

So when offiste reclamation starts, TSM gets the list of ALL tapes above
the reclamation threshold,
mounts the first input tape, and tries to reclaim all the files on that
input tape.
The result is that you reclaim a little of EACH of the offsite tapes
with each input tape mount.

The usual circumvention is to set your offsite reclamation threshold to
98, let reclaim finish, then set it down to 95, then 90, then 85, etc.
Otherwise you may NEVER finish.

Wanda Prather
"I/O, I/O, It's all about I/O"  -(me)


  

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Ford, Phillip
Sent: Monday, November 21, 2005 2:25 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Reclamation


I have noticed this.  I did not know if it started with the 70% as you
said
but I know that it does not start with the 99.9%.  We have been having
trouble getting reclaim to finish.  Since it starts with the 70% and
does
not finish, over time we have a lot of tapes offsite which are 99%
reclaimable.  And I do mean a lot.  I have actually created a process
that
does a move data on these to try and get them reclaimed.  Our version of
the
server is old and we are in the process of upgrading to 5 something and
I
was hoping that that was going to fix the problem.  Well I guess not.
It
has been a real problem for me.


--
Phillip
320-4462



-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Meadows, Andrew
Sent: Monday, November 21, 2005 12:50 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Reclamation


I was wondering if anyone else has noticed this same issue and if there
is
anything that I can do for it.
I am running on version 5.3.1.6 on AIX 5.1. Storage pools in question
are
LTO gen 1
Scenario:
Copypoola has 50 volumes that are over 70% reclaimable with the
percentages
ranging from 70% to 99.9% reclaimable.
If I start reclamation for copypoola with rec=70 (upd stg copypoola
rec=70) it will start with the volumes that are 70% reclaimable and work
its
way up.

This doesn't make sense to me wouldn't you start with the 99.9%
reclaimable
volumes first? If I do this for my onsite pools it starts the logical
way
with 99.9% and works its way down.

Has anyone else noticed this and is there something I am doing wrong
here or
is this just the way it is.

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