If it's a T2000 it's Sol 10 and the default for shared memory is 1/4 of
physical memory which I can almost guarantee no one set their's that big
back in Sol 9. I would not put any of these entries in /etc/system on Sol
10, my V890 with Sol 10 runs very well without any.

Dom


-----Original Message-----
From: Andre Smith [mailto:andre.smith AT mac DOT com] 
Sent: Saturday, 17 November 2007 8:58 AM
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] T2000 vaulting performance with VTL/LTO3

Depending on how many streams and write drives are running  
concurrently, check your shared memory settings in /etc/system.

On Nov 16, 2007, at 1:00 PM, Chris_Millet <netbackup-forum AT backupcentral DOT 
com

 > wrote:

>
> I'm starting to experiment with the use of T2000 for media servers.   
> The backup server is a T2000 8 core, 18GB system.  There is a Qlogic  
> QLE2462 PCI-E dual port 4Gb adapter in the system that plugs into a  
> Qlogic 5602 switch.  From there, one port is zoned to a EMC CDL 4400  
> (VTL) and a few HP LTO3 tape drives.  The connectivity is 4Gb from  
> host to switch, and from switch to the VTL.  The tape drive is 2Gb.
>
> So when using Netbackup Vault to copy a backup done to the VTL to a  
> real tape drive, the backup performance tops out at about 90MB/sec.   
> If I spin up two jobs to two tape drives, they both go about 45MB/ 
> sec.   It seems I've hit a 90MB/sec bottleneck somehow.  I have  
> v240s performing better!
>
> Write performance to the VTL from incoming client backups over the  
> WAN exceeds the vault performance.
>
> My next step is to zone the tape drives on one of the HBA ports, and  
> the VTL zoned on the other port.
>
> I'm using:
> SIZE_DATA_BUFFERS = 262144
> NUMBER_DATA_BUFFERS = 64
>
> Any other suggestions?
>
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