ADSM-L

TSM-HSM experiences?

2001-02-22 05:43:53
Subject: TSM-HSM experiences?
From: Per Ekman <pek AT PDC.KTH DOT SE>
Date: Thu, 22 Feb 2001 11:44:09 +0100
Hello,

We've been evaluating and trying to implement a HSM service with the
TSM-HSM client at our site. We use the 4.1 HSM client for AIX and run
the 3.7.2 TSM server (also on AIX). Our experience so far is not very
favourable. Compared to our current DMF HSM system TSM is an
administrative nightmare, the HSM functionality in particular feels
like something someone hacked together for fun and was suddenly turned
into a product.

So I'm wondering what experiences others have with TSM-HSM, good or
bad.  I'm particularily interested in how much data is stored, what
the usage patterns look like, how things are set up (backups for
instance) and how much administration is needed.

I know there are issues with dsmreconcile for filesystems with many
files. Apart from that there are some bugs (filesystems filling up to
the extent that migration is prevented, dsm* commands not following
symlinks) some worrying omissions (serious contortions appear to be
necessary to get good meta-data backups) and a generally strange and
overly-complex design are my main concerns at this point.

/Per
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