If your network is the bottleneck , upgraded drives in no way would help.
Ensure all LAN ports in the path are at max speed full duplex and not on auto.
We tend to ignore switch port configs, worth having a look at your switch ports
as well.
What is the server parallalism value set ? Increase parallalism and drive
target sessions and optimise them. If there are few large savesets which run
for long time split them and run in parallel.
Dont you append backup to tapes ? If it uses 2 tapes to write and if you keep
appending them, it shouldn't hurt tape utilization.
Thanks!
Shyamsundar Hegde
( Apologies for typos, sent from my Windows mobile )
-----Original Message-----
From: kurianv <networker-forum AT BACKUPCENTRAL DOT COM>
Sent: Monday, January 19, 2009 11:06 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] tuning in LTO 4 tape library
hi,
I just replaced my sdlt library with a Quantum iscalar 500 tape library with
LTO 4 tape drives. After configuration wat i could see is that i am able to
backup with the same speed i got with sdlt usually. For backing up around 560
gb of data it takes 12 hours in two tapes paralely. I would like to fine tune
the current configuration so that it can finish a little more earlier.
Another point is that if it used 2 tapes it ended up in filling only 1/4 of the
2 tapes, utlimately for which simply 2 tapes are wasted. Is it possible to run
the backup it into 1 tape and also finishing it early. I have set the
parameters for parallelism as 4. is there any problems ? Kindly suggest what i
can do with this ?
If you are asking my network speed, its equipped with 2 Gbps connection and the
tape drives also the same. I know network speed is something seriously to be
considered, but what iam expecting from a new backup tape library is that , i
also want some improvements in speed too ..
any1 any suggestions ? kindly help me ..
rgds,
kv
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