Hi Tim,
what about Number Data Buffer and Size Data Buffer?


>From: "Tim Berger" <tim.berger at gmail.com>
>To: "Justin Piszcz" <jpiszcz at lucidpixels.com>
>CC: veritas-bu at mailman.eng.auburn.edu
>Subject: Re: [Veritas-bu] LTO3 Drive Speed Poll
>Date: Tue, 18 Jul 2006 19:16:25 -0700
>
>On 7/11/06, Justin Piszcz <jpiszcz at lucidpixels.com> wrote:
>>
>>
>>What speeds have other members gotten when doing speed testing to LTO3
>>drives?
>>
>>Justin.
>
>
>With real-world data, netbackup is reporting from 6MB/sec ( this does not
>seem right) to about 143.5MB/sec with 2GB fragments over a sample of 1572
>fragments for the past 15 days.  Average performance is 78.5MB/sec.  These
>are directly connected IBM LTO3 drives to linux systems using Qlogic
>2322's.  Most of our backups fall in the 80 to 125MB/sec range.
>
>Creating  /usr/openv/netbackup/NET_BUFFER_SZ with a reasonable value seems
>to have helped us a lot even though its just going from staging to tape.
>
>--
>-Tim


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