Veritas-bu

[Veritas-bu] Flash backup for mount-points Windows 2003

2007-10-15 15:20:21
Subject: [Veritas-bu] Flash backup for mount-points Windows 2003
From: tburrell <netbackup-forum AT backupcentral DOT com>
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Date: Mon, 15 Oct 2007 12:04:03 -0700
Chris,
We set up one mount point as a dedicated caching area, and then let Window 
manage it (using VSS).  Since we are in a cluster the cache has to be in the 
same resource group, but it can be shared by all the other mount points in that 
group.  Works very well.

Tom


Hall, Christian N. wrote:
> Tom, 
> 
> Thanks for the information provided, but I have one more question. I
> have 10 - 30 LUNS 272GB in size housing millions of small files (77KB
> size) across 16 windows 2003 media servers. 
> 
> Did you have a customized dedicated disk caching area or did you have
> Netbackup manage the cache file sizing for you?
> 
> Thanks,
> Chris Hall
> 
> 
> -----Original Message-----
> From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of 
> tburrell
> Sent: Friday, October 12, 2007 3:25 PM
> To: VERITAS-BU AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] Flash backup for mount-points Windows 2003
> 
> 
> Chris,
> we did experience one issue with timeouts for large volumes with massive
> numbers of small files (ie: 500GB file system at 90% full, average file
> size 11k), which was resolved back at MP4 for 5.1.  Otherwise our speeds
> have always been significantly better than standard file backups without
> any special tweaking.  We also found that using DSSU's in combination
> with Flashbackup gave the best performance- not really a surprise there.
> 
> 
> Of course, if you have mostly empty volumes you pay a huge price in
> terms of size and overall time, but I'm sure you knew that.  In general
> we have found that we get excellent results using the same settings that
> work best in the rest of the environment.
> 
> Tom
> 
> 
> 
> Hall, Christian N. wrote:
> 
> > Tom, 
> > 
> > I had the syntax resolved thanks to all that have responded. However,
> > 
> I
> 
> > noticed that my flash-backups speeds are less then traditional
> > 
> backups.
> 
> > Are you aware of tuning suggestions other then buffer_size and # of
> > buffers available that you have used? Have you experimented with
> > fragment sizes? 
> > 
> > Thanks,
> > Chris Hall
> > 
> > 
> > -----Original Message-----
> > From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
> > [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of
> > 
> tburrell
> 
> > Sent: Friday, October 12, 2007 2:41 PM
> > To: VERITAS-BU AT mailman.eng.auburn DOT edu
> > Subject: [Veritas-bu] Flash backup for mount-points Windows 2003
> > 
> > 
> > Chris,
> > To be a little more definitive- 5.1 does support Windows Flashbackup-
> > it's kind of hidden on the top of page 105 of the "Advanced Client 5.1
> > System Administrator's Guide"- they slipped it in as an example in
> > 
> step
> 
> > 10.
> > 
> > We used it extensively (have now upgraded to 6) but it worked very
> > 
> well.
> 
> > 
> > Tom Burrell
> > 
> > 
> > Hall, Christian N. wrote:
> > 
> > 
> > > All,  
> > > 
> > > Veritas Netbackup 5.1MP6  
> > > Master server Solaris 8 
> > > T9940B tape drives X 26  
> > > ACSLS 7.1 
> > > SSO  
> > > Windows 2003 media servers X 20  
> > > Emc Symetric storage  
> > > EMC Clarrion Storage 
> > > EMC 9820-E HBA 
> > > Cisco 9513 SAN 
> > > Quantum DX-100 VTL 
> > > DECRU 1020 
> > > 
> > > According to VERITAS published documentation I am reading.
> > > 
> > > 
> > Fash-backups does not support mount-points on version 5.0. Does this
> > also apply for 5.1? I have not found documentation for 5.1 that says
> > 
> the
> 
> > contrary. Is there anyone out there that's using flash-backup with
> > mount-points with 5.1?  Any help would be appreciated.  
> > 
> > 
> > > 
> > > Thanks, 
> > > Chris Hall
> > > 
> > > 
> > 
> > 
> > 
> > 
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> > 
> > 
> > 
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> > 
> 
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