On Nov 16, 2007 7:00 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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