Paul Keating wrote:

>  
>
>>-----Original Message-----
>>From: veritas-bu-admin AT mailman.eng.auburn DOT edu 
>>[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of 
>>Dave Markham
>>Sent: December 21, 2004 11:39 AM
>>To: veritas-bu AT mailman.eng.auburn DOT edu
>>Subject: [Veritas-bu] data buffers tuning etc on netbackup 5 
>>and LTO drives
>>
>>I was wondering is this still neccessary for performance improvements 
>>with netbackup 5mp3 ?
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>>
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>Absolutely.
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>>Im running on Solaris 9 with LTO2 tape drives. I just doing a test 
>>backup and although i dont rely on it the job tasks is saying its 
>>getting 3800kbps which to me is very slow for LTO2.
>>    
>>
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>I'm running Solaris 8, with LTO2 drives, and NB5MP3
>
>If you're getting 10 jobs multiplexed to one tape, and getting 3800KB/s,
>*PER JOB* then you're about at the native write speed of the drive.
>(35 or so MB/s)
>
>I've occasionally gotten upto 60-70 MB/s to one drive, depending on the
>compressability of the data.....but average is lower than
>that....usually around 45000-50000 KB/s (~40-50MB/s)
>
>
>Paul
>
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>
>  
>
I was meaning about 3.8 MB/s which was very slow in my opinion :(

Ive changed the Size_data_buffers to 21244 and number_data_buffers to 16 
and think am getting around 16MB/s now.

What settings has anyone else used?

Cheers