Re: [Veritas-bu] performance tuning

You can look in your bptm log for information which will tell you what your buffers are doing

If you do a search on the symantec knowledge base you should find a few technotes

Search for SIZE_DATA_BUFFERS – that is one of the config files

-----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 mark wragge
Sent: 30 July 2007 16:18
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] performance tuning - when to use buffers

What is the best rule to use with performance tuning to get maximum speed from tape devices - should one use default buffer settings or custom buffer settings? Where do i find the recommendations for buffer settings for different drive types (HP LTO3 and HP LTO3 Worm in particular).

Other than buffer settings, what can be customized to provide maximum performance for drive speed? I am aware of multiplexing and datastreaming. Are there customized settings for SCSI HBA drivers and Tape devices drivers that will improce performance.

The OS is Solaris 9, NBU 6mp4 and SCSI HP LTO 3 tape devices.

Thanks.

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Re: [Veritas-bu] performance tuning - when to use buffers