Hello Courtenay,

A few questions. 

Which storage unit, with what os and what os level are you using for the NDMP 
backups? Is the tape drive, of which make and model, attached to the storage 
unit

What level do you have the new vx logs set to?

We found out the hard way that a high debug level with the new vx logs can 
cause an extreme slow down of NDMP backups running on netapp R200's. The larger 
the file count, small files are worst. 
A NDMP backup of a few heavy files will not slow down.


There are other reasons for a slow down. 

One test that you can run, is to run the ndmp backup on the storage unit 
without netbackup. This helps one know if the storage unit/tape system are 
having the problem or if it is netbackup/networking etc issues. 

len

-----Original Message-----
From: veritas-bu-bounces at mailman.eng.auburn.edu [mailto:veritas-bu-bounces 
at mailman.eng.auburn.edu] On Behalf Of Jones, Courtenay
Sent: Monday, November 27, 2006 11:46 AM
To: Veritas-bu at mailman.eng.auburn.edu
Subject: [Veritas-bu] Netbackup 6.0/Windows Master Server/NDMP/LTO3

We are currently deploying Netbackup 6.0. We are working on optimizing
on our NDMP backup. We currently have a Windows 2003 master server
performing the NDMP backups to a HP ESL 712 (LTO 3 drives). Our write
rates are currently only about 70 MB/s. Can anyone make suggestions for
trying to increase write speeds to tape?


Regards,

-cj
Courtenay Jones
SBS Unix Admin


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