ADSM-L

Reclamation and large files

2006-11-07 11:24:19
Subject: Reclamation and large files
From: Hans Christian Riksheim <HCR AT STERIA DOT NO>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 7 Nov 2006 17:23:31 +0100
Hi,

I am trying to understand what TSM does with reclamation of large files.
We have a filepool of 10G-volumes and I see the TSM-server moving a 64G
file during reclamation. This file is from an Exchange-backup. 

It seems to me that TSM moves the whole file to other volumes and not
just the small part of it that was residing on a volume and causing the
reclamation to start in the first place. A "q vol f=d" tells me that the
current input volume during reclamation is full with no reclaimable
space.

So for me this sounds a lot of waste of disk I/O. I am curiuos to know
if there is a good reason for this behavior or how to avoid it(except
creating larger volumes).


Best regards

Hans C. Riksheim


 
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