Veritas-bu

[Veritas-bu] Backing up a large amount of small files

2002-10-30 16:24:14
Subject: [Veritas-bu] Backing up a large amount of small files
From: kmarx AT trigon DOT com (Marx, Keath)
Date: Wed, 30 Oct 2002 16:24:14 -0500
I have been searching but can't seem to find any indication one way or the
other.  Does this issue impact win2k servers as well?

-----Original Message-----
From: Nash, Ebon [mailto:Ebon_Nash AT compuware DOT com] 
Sent: Wednesday, October 30, 2002 1:47 PM
To: 'paulg AT CDCNA DOT COM'; Bruno.Bossier AT comparex DOT be;
veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] Backing up a large amount of small files

There is a Veritas Technote that discusses poor backup throughput
performance on RAID 5 disks.  It shows how to disable the resetting of
access times which can seriously degrade performance on machines with a lot
of smaller files.  See technote 240607 on Veritas' support site for further
information.


Ebon

-----Original Message-----
From: paulg AT CDCNA DOT COM [mailto:paulg AT CDCNA DOT COM]
Sent: Wednesday, October 30, 2002 1:39 PM
To: Bruno.Bossier AT comparex DOT be; veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Backing up a large amount of small files


You might want to consider OFM from StBernard, it definitely has an edge
over
OTM.  Should run you about $600/license.  While not without issues, file
checkpointing capabilities of OFM are definitely better than that of OTM.

paulg

On Oct 30,  5:36pm, <Bruno.Bossier AT comparex DOT be> wrote:
> Subject: [Veritas-bu] Backing up a large amount of small files
> We have a server with a directory which contains over 3 million files for
a
> total amount of nearly 150 Gb. We are trying to back this up in a
> reasonable amount of time (12 to 14 hours maximum). OTM is enabled. We
have
> not succeeded so far. A lot of time is lost at the beginning of the backup
> when the backup is going through the directory structure to check all
> files. This takes several hours. The first we already did until now is to
> set the maximum cache size to 0 (unlimited). This stopped the errors we
saw
> in the Windows eventlog when OTM is started and then aborted after 40
> minutes, then restarted again ....
>
> Can someone give some suggestions to speed up this backup ?
>
> Thanks,
> Bruno
>
>
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>-- End of excerpt from <Bruno.Bossier AT comparex DOT be>


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