We saw a much bigger improvement than 10%. Out of the box we were only
achieving 18MB/s when backing up a test database. After playing with
buffers we were achieving between 75 and 80MB/s. 
 
We increased:- 
 
Client buffer to 128MB
NUMBER_DATA_BUFFERS to 64
NET_BUFFER_SZ to 528384.
 
The biggest gain was with the NUMBER_DATA_BUFFERS.



________________________________

        From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of Dave
        Sent: Tuesday, 12 September 2006 4:09 am
        To: 'Ganapathy G'; veritas-bu at mailman.eng.auburn.edu
        Subject: Re: [Veritas-bu] Netbackup 6.0 Performance Very Slow
        
        

         ......  

         

        Performance tuning (increasing buffers and sizes) can give you
about 10% better back up speed, but if you are only getting 6MB/sec then
something is seriously wrong with your hardware strategy. Also, you
don't mention if this is Windows or Unix.  

         

        ...... 



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