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Re: Tape Drive Compression over TSM Compression
2004-08-10 15:47:22
At 02:08 PM 8/9/2004, Bruno Melo - Suporte Informática wrote:
what are the implications on doing this?
I saw on the Redbooks that this is not recommended!
From empirical analysis, DLT7000 drives do not automatically detect that
compressing data is actually expanding it. We opted to not use drive
compression on DLT7000/8000 for that reason.
For LTO, we were told that the algorithm automatically detects this
situation, and will disable compression for data that would actually
expand. For this reason, we do use drive compression for our LTO1 and LTO2
drives.
--
Paul Zarnowski Ph: 607-255-4757
719 Rhodes Hall, Cornell University Fx: 607-255-8521
Ithaca, NY 14853-3801 Em: psz1 AT cornell DOT edu
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