Veritas-bu

[Veritas-bu] Compression

2002-12-20 09:26:42
Subject: [Veritas-bu] Compression
From: jkennedy AT qualcomm DOT com (Kennedy, Jeffrey)
Date: Fri, 20 Dec 2002 06:26:42 -0800
Software compression in NBU is network compression only, the server will
uncompress the data before it puts it on tape.  Hardware/tape
compression actually compresses the data onto tape.

You can use both, and in your case it may be necessary to get a full
backup over the network.

~JK

> -----Original Message-----
> From: Bruno.Bossier AT comparex DOT be [mailto:Bruno.Bossier AT comparex DOT 
> be]
> Sent: Friday, December 20, 2002 2:42 AM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] Compression
> 
> We have a LAN client which is located at another site several
kilometers
> from the site where the master server and the tape library are
located.
> There is only a 2Mbit line between the 2 sites, so the backup takes a
very
> long time. Actually, until now, it never ran completely because of
network
> timeouts or because it was out of the time window or because it was
> cancelled by the owners.
> 
> What can I do to improve at least a little the performance ? I already
> thought of disabling OTM, setting the communications buffer size to
256
> (now 32). ANother thought would be to enable compression at the policy
> level. I know what the advantages and disavantages are of using
software
> compression. What I would like to know is what happens if you use
software
> compression and hardware compression at the same time ?
> 
> Can anyone sched some light on this ?
> 
> Thanks,
> Bruno
> 
> 
> 
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