There was a patch 4.5Mp2 that fixed some performance issues with lots of
little files (performance and lots of small files is still problematic with
NBU however). But having a tape just waiting for data is another issue. This
problem happens just for a standard full backup with nothing else going on?

G

Gary Andresen
Impossible Happens, Plan Ahead
Pacific Northwest Data Inc.
Tel: 503.701.5185
Fax: 503.692.3910
gary.andresen AT pnwdata DOT com
www.pnwdata.com

> -----Original Message-----
> From: veritas-bu-admin AT mailman.eng.auburn DOT edu [mailto:veritas-bu-
> admin AT mailman.eng.auburn DOT edu] On Behalf Of David Chapa
> Sent: Thursday, March 18, 2004 7:33 AM
> To: Ruben de Groot; veritas-bu AT mailman.eng.auburn DOT edu
> Subject: RE: [Veritas-bu] Large volume backup takes forever to start
> 
> Argh!  Hit send too fast.
> 
> Is duplication happening on the media server that owns the disk storage
> unit?
> 
> In other words are you duplicating the images to another media server's
> tape storage unit?
> 
> If so, then there may be some "tuning" you can do with buffers to
> increase this process along the way.
> 
> David A. Chapa * Technical Advisor, Technical Marketing * ADIC *
> 720.249.5836 * david.chapa AT adic DOT com
> 
> The FUTURE is HERE - http://www.adic.com/gopathlightvx
> 
> 
> -----Original Message-----
> From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Ruben de
> Groot
> Sent: Wednesday, March 17, 2004 1:51 AM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] Large volume backup takes forever to start
> 
> 
> This is on a NBU4.5 w2k client/mediaserver. A large SAN-attached volume
> with +/- 300 GB data on it takes about an hour before actually starting
> to write to tape. In the meantime looking at job tracker, it looks like
> it's "indexing" the volume or something.
> This is really lowering backup performance plus we have a tapedrive just
> sitting there for an hour every day.
> Anyone can explain this behaviour or better, have a solution?
> 
> Thanks,
> 
> Ruben de Groot
> TU Delft DTO-IB
> 
> 
> _______________________________________________
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> 
> _______________________________________________
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