"The number of cartridges in use by the pool goes up and up"

Do you have collation on?  Check stgpool with f=d, if you don't have
Collocate Set to NO it will default to Group then if no Colo Group
exists it defaults to Node.  So every Client Filespace gets a tape.  
 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Keith Arbogast
Sent: Thursday, March 10, 2011 2:47 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Does Move Data recover space on virtual volumes?

My specific problem is with a tape pool that is a target for virtual
volumes created by a remote TSM server. The number of cartridges in use
by the pool goes up and up, at a faster rate than the data growth on the
remote server. I suspect there are many virtual volumes in the target
pool with not many active files left on them. 

My understanding is that even one active file in a virtual volume keeps
all the space used by it on a tape from being reclaimed. So far, my only
resort seems to be to do MOVE DATA on virtual volumes with log
pct_utilization, using 'reconstruct=yes'. That won't be efficient or
fast. 

If I am missing something, please let me know.

My thanks to all who have offered suggestions so far, Keith

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