How many save sets are in your backup?  If only one, then you are out of luck 
since AFAIK you can't send a single saveset to multiple devices simultaneously.
How many LTO2 drives do you have access to from the Networker server?
How are the LTO2 drives connected to the Networker server?  SCSI, Fibre, etc.
What is the Network architecture between the db server and the networker 
server?  80MB/sec sounds like 2-3 teamed GBit NICs.
What is the adv_file disk architecture?  What kind of local disk access metrics 
do you see on it?  Read/Write MB/sec?

45MB/sec is max for LTO2.  I don't personally stage multiple savesets from the 
same volume at the same time, but I think I remember reading about someone who 
was able to do so from the RO instance of the adv_file volume.  If so you could 
initiate multiple stages if you have multiple savesets and multiple drive 
targets.  But at some point you are going to saturate your connection to the 
LTO2 drives unless they are on separate scsi busses or fc fabrics.

Another option is to begin staging savesets prior to completion of the entire 
backup.  But this depends greatly on the number and size of the savesets in 
question and will require some pretty interesting scripting.

Also to consider are the impact to your network during the two scenarios.  In 
scenario one you have ~40MB/sec impact to your network for the total backup 
time of ~16 hours.  In scenario two you have a ~80MB/sec impact to your network 
for ~7 hours at which time the workload shifts completely to your networker 
server.  If your db's are offline during backup, then scenario two seems a much 
better way to go.

--Shawn



-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On 
Behalf Of anandhg
Sent: Monday, August 18, 2008 10:04 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] Query in Staging from adv_file

Thanks for your response. My requirement is I want to stage the save sets from 
the faster. Let me give the current backup statistics. A dbase backup using NMO 
over LAN gave a throughput of 40MB/s and it has taken ~ 16 hours to complete. 
The same backup after moving to disk based solution(adv_file) has completed in 
7 hrs of time with a throughput of 80 MB/s. But staging from disk to tape is 
going at 45 MB/s and so the total backup window is more than the backup to 
tape, because of staging 1 save set at a time. The drive is LTO2, I think this 
is the maximum an LTO2 drive can perform.

Staging cannot read 2 save sets at a time from a adv_file, Any suggestions for 
tuning the performance of adv_file based backup.

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