You might be running into what I've seen if you are performing your
reclamation via RECLaim STGpool. If you have many very low utilized tapes
and you do not use an OFFSITERECLAIMLIMIT then it is possible that the
reclamation process will only yield another tape going off site and none
coming back.
Say you have 1.5 TB tapes (est capacity) and your off site copy pool is
mainly volumes that are 5-10% utilized (which works out to be between 75-150
GB's) and your drives can read/write at 200 GB/hr so to fill one new tape it
will take 7-8 hours and require the clearing of 10-20 ~offsite~ tapes.
TSM will look at ALL tapes that meet the threshold setting so if you have 30
off site tapes at 10% or less... unless you do something such as use an
OFFSITERECLAIMLIMIT of 5, TSM will start reclamation across all 30 of those
tapes and unless you allow it to run for at least 12 hours, you are unlikely
to get back very many if any tapes.
Syntax
>>-RECLaim STGpool--pool_name--+----------------------+--------->
'-THreshold--=--number-'
.-Wait--=--No------.
>--+----------------------+--+------------------+--------------->
'-DUration--=--minutes-' '-Wait--=--+-No--+-'
'-Yes-'
>--+-------------------------------------------+---------------><
'-OFFSITERECLAIMLimit--=--number_of_volumes-'
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of
Moyer, Joni M
Sent: Wednesday, January 27, 2010 7:54 AM
To: ADSM-L@VM.MARIST.EDU
Subject: [ADSM-L] Reclamation for offsite storage pools
Hello everyone,
For several years I had not been able to run reclamation on one of my tsm
servers due to the lack of physical tape drives to accomplish the task. I
am in the process of trying to get caught up, but it seems that I just never
do. Most of my issue is with the copy storage pool volumes which are very
under-utilized. It seems like reclamation, even if I start multiple
reclamation threads, is taking quite a long time.
Is there some other way for me to get the data onto new media without doing
reclamation? Can I do a move data from 1 copy storage pool volume to the
another volume within the same copy storage pool? I know that this would
mean bringing the tapes back from the vault, but it is just not progressing
as I would like with the reclamation processes.
Any suggestions are greatly appreciated as I would like to get this back
under control.
Thank you in advance!
Joni Moyer
Storage Administrator III
(717)302-9966
joni.mo...@highmark.com
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