I had good results splitting a 500 Gb filesystem into several policies,
backing up files/directories starting a-d,e-h,i-m etc. (depending on the
files spread).

Reduced from 24 hours to 10-12 hours running the policies in parallel.

I haven't investigated into detail as to *why* this is so much better; I'm
sure it's hiding the real bottleneck, but for now it works as a pragmatic
solution.  I have one covering policy which backs the whole filesystem up,
excluding what the others are backing up.

Phil

-----Original Message-----
From: Vapiwala, Kevin V [IT] [mailto:kevin.v.vapiwala AT citigroup DOT com] 
Sent: 22 December 2003 15:48
To: Ed Wilts; Veritas List
Subject: RE: [Veritas-bu] Backing up very large Windows file systems


how about using multiple policies for the client each with specific
paths ?

-----Original Message-----
From: Ed Wilts [mailto:ewilts AT ewilts DOT org]
Sent: Friday, December 19, 2003 2:56 PM
To: Veritas List
Subject: [Veritas-bu] Backing up very large Windows file systems


We're struggling with a good mechanism of backing up very large file
systems on Windows 2003 clusters.  A typical file system will be about
500GB with 10 million files.  NetBackup 4.5 gets absolutely horrible
performance compared to a similarly-sized file system with <1M files.

These systems are connected via GigE to a Solaris system with a SAN
connection to our L700 library containing SDLT drives.  A single backup
can
take on the order of 4 days.

What optimization can I do?  FlashBackup might be an option, but it's
not available for Windows until 5.0 and we're not there yet.

Thanks,
        .../Ed

-- 
Ed Wilts, Mounds View, MN, USA
mailto:ewilts AT ewilts DOT org
_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu

_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu


This private and confidential e-mail has been sent to you by Egg.
The Egg group of companies includes Egg Banking plc
(registered no. 2999842), Egg Financial Products Ltd (registered
no. 3319027) and Egg Investments Ltd (registered no. 3403963) which
carries out investment business on behalf of Egg and is regulated
by the Financial Services Authority.  
Registered in England and Wales. Registered offices: 1 Waterhouse Square,
138-142 Holborn, London EC1N 2NA.
If you are not the intended recipient of this e-mail and have
received it in error, please notify the sender by replying with
'received in error' as the subject and then delete it from your
mailbox.