>> On Mon, 18 Sep 2006 12:34:04 -0700, "Thorneycroft, Doug" <dthorneycroft AT 
>> LACSD DOT ORG> said:


> I put out this idea a couple of years ago, It didn't
> generate a whole lot of interest then.

> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
> Orville Lantto
> Sent: Monday, September 18, 2006 12:14 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Migrate Inactive Files Feature Proposal


> I had an idea over the weekend and would like some comment on its
> feasibility.  With the growing need for disk-to-disk-to-tape backup
> strategies, it would be very nice to be able to migrate ONLY
> inactive copies of files out of a storage pool.  I can come up with
> no reason that this should be difficult or impossible to be added as
> a TSM feature.


They're discussing ways to get similar effects.  The reason it's
difficult is that the fundamental unit of storage insited TSM storage
volumes is not the "file", it's the "aggregate".  This is a group of
files and diperhaps metadata, where such doesn't fit in the TSM DB.
Statements about e.g. copy stgpool coverage are made on the aggregate
level.

COnsequently, breaking up these aggregates (rather than simply
removing parts of them) makes for databases growth and referential
integrity problems.


- Allen S. Rout