Veritas-bu

[Veritas-bu] LTO3 [C1]

2007-03-22 18:52:56
Subject: [Veritas-bu] LTO3 [C1]
From: Hesham.AFIFI at sgcib.com (Hesham.AFIFI AT sgcib DOT com)
Date: Thu, 22 Mar 2007 18:52:56 -0400
Dom,

I have 4 media servers and two L700 librarries

Ten LTO3 each librarry

Media servs has giganet cards
Switches and LTO3 are all fiber as well

Thanks



----- Original Message -----
From: Dominik Pietrzykowski [dominik_pietrzykowski at toll.com.au]
Sent: 03/22/2007 06:37 PM
To: Hesham AFIFI/us/socgen at socgen;veritas-bu at mailman.eng.auburn.edu
Subject: RE: [Veritas-bu] LTO3 [C1]

 

Hi Hesham,

 

What are the H/W specs of the media servers ? How many drives each ? What
type of NICs ?

What sort of network ? How much data are the clients pumping out ?  Do you
have any multiplexed together ?

 

It's hard to get these drives going fast (LTO3s and T10Ks) unless it's on a
test bench, duping tapes, using DSSUs or fat network pipes, grunty servers
and clients that stream well. I don't know anyone who has LTO3s and T10Ks
running consistently at full speed.

 

Regards,

 

Dom

 

  _____  

From: Hesham.AFIFI at sgcib.com [mailto:Hesham.AFIFI at sgcib.com] 
Sent: Friday, 23 March 2007 9:13 AM
To: veritas-bu at mailman.eng.auburn.edu
Subject: [Veritas-bu] LTO3 [C1]

 


Hi All 

I have a question regarding LTO3 performance 

>From the NBU Administrative console I see the speed between 5000 KB - 15000
KB 

My environment is as follow 

Netbackup Version : 5.1 MP4 

OS: Solaris 8 on All Master and Media servers 

Library : STK L700 with 10 LTO3 

        
Files 

NET_BUFFER_SZ   is setup to 131072 on Client and Media Server 

SIZE_DATA_BUFFERS   131072  on all Media servers 

NUMBER_DATA_BUFFERS is setup  64 


We do in-line copies ' two '  and our multiplexing number is 15 and 20 for
some policies 



Do you think if I increase these numbers in NUMBER_DATA_BUFFERS,
SIZE_DATA_BUFFERS it might increase the overall performance 



Best Regards 
Hesham Afifi
ITEC- GLS- SYSTEMS-UNIX 
212-278-6212 (office)
917-609-5312 (pager/Cell)

 
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