When you say you've seen 25MB/sec I take that to mean that's the fastest you've 
seen, and that doesn't give me much hope.  I was really hoping to be able to 
push 2 or 3 LTO3 drives with a single windows media server.

As to sizing, it would be whatever the DL360 can hold.  I'm not too familiar 
with the HP Intel line so the spec's escape me at the moment.  I'd even be 
willing to go the DL365 route (AMD instead of Intel) if I knew it was able to 
do what I'm after.

Thanks.

~JK

-----Original Message-----
From: ida3248b AT post.cybercity DOT dk [mailto:ida3248b AT post.cybercity DOT 
dk] 
Sent: Wednesday, September 14, 2005 12:55 AM
To: Kennedy, Jeffrey; veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Windows media server question

Hello JK

I think it depends on CPU's, the amount RAM, number of HBA's

But the first thing to do is tune netbackups SIZE_DATA_BUFFER and 
NUMBER_DATA_BUFFER for enterprise tape drives

I have seen 25 MBytes/sec on a windows machine to STK9940A drives (30 
MBytes/sec native) with 
NUMBER_DATA_BUFFER 32
SIZE_DATA_BUFFER 262144 (256K)

There is also the MaximumSGList (see 
http://mailman.eng.auburn.edu/pipermail/veritas-bu/2003-March/015785.html) , 
which I havn't tried to use yet

Regards
Michael

On Tue, 13 Sep 2005 19:14:44 -0700, Kennedy, Jeffrey wrote
> We are new to windows as a media server and I have some performance 
questions for anyone who is using them.
> Background:
> NBU 5.x
> HPDL360 as media server
> Windows 2003 Adv Server
> HP LTO3 drives
> Fabric attached hosts and drives (not host attached)
> Data is moved through fabric, not ethernet
> Fabric is 2gb for all ports
> What type of performance are you seeing with windows media servers given 
this configuration (roughly of course)?  Can a windows media server push an 
LTO3 drive?  Can a single windows media server push multiple LTO3 drives?
> Thanks.
> ~JK

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