Hi all,

currently, in TSM it all files that are migrated by HSM are also copied to
the backup storage pool. That means that in any sane environment, you'd wind
up with 4 copies of the same active file, 2 in the backup and 2 in HSM. This
is a bit overkill, in a normal world, having two copies of an active file
would be enough. In our environment, that would lead to a huge
cost-reduction allready and I guess there a quite a few HSM setups that are
a lot larger than ours.

What I'd like to see is that for HSM files only two copies of the active
file are kept, this saves time in migration (if the file is allready
backed-up no actual transfer of a file has to occur on migration, just some
fiddling in the TSM db), is saves time on backup (if the file is allready
migrated or premigrated, no actual transfer or copy has to occur, just some
db fiddling), and it saves space, and lots of it in large HSM environments.

anyone care to comment?

--
Met vriendelijke groeten,

Remco Post

SARA - Stichting Academisch Rekencentrum Amsterdam    http://www.sara.nl
High Performance Computing  Tel. +31 20 592 8008    Fax. +31 20 668 3167

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