Hi Joe,
We have 3 LTO2 drives in a Dell PV136T.... And all 3 get used when a
large group runs (each group has parallelism set to 0, defaulting to the
server).
Our 'Server Parallelism' is set to 12 (4 sessions per drive times 3
drives), and each drive has been set to allow max 4 target sessions per
drive.... While a large group is running, we see a total of 12 sessions
going to the 3 tape drives (4 per drive).
I do have one group I run with a limit of 8 sessions, so it won't use
more than 2 drives at a time during the day, in case we need one for a
restore session....
-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Joe Lyons
Sent: Monday, March 05, 2007 3:42 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Using Mulitple Drives at Once
Hi Todd,
Thanks for the reply. I'm new to Networker, coming from a Netbackup
background so please forgive my ignorance and confusion regarding
terminology. I assume by session you mean if I look in the
"Monitoring->Sessions" tab, how many do I see. Well I see 4 session all
for /dev/nst2. I don't see any for /dev/nst1 or /dev/nst0. However in
"Devices" I see my 3 devices all with tapes loaded (in the correct pool)
but only 1 tape seems to have any data on it. The other two tapes have
a %used as 0.1% and mode of append.
So it seems as if I am nearly there, in that on commencement of the
backup if fills all three drives with tapes from the correct pool but
then only writes to one of them !! Arrrggh.
Thanks
Joe
-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Willeat, Todd
Sent: 05 March 2007 20:30
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Using Mulitple Drives at Once
How many sessions are you running concurrently? You can lower the target
sessions for each drive...
Todd A. Willeat
Senior Storage Administrator
Sisters of Mercy Health System - MISD
3637 S. Geyer Rd.
St. Louis, MO 63127
(314) 364-3110
Todd.Willeat AT Mercy DOT net
http://www.mercy.net/
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-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Joe Lyons
Sent: Monday, March 05, 2007 2:13 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] Using Mulitple Drives at Once
Hi,
I have a scalar 100 device with 3 LTO3 fiber drives. I'd like to be
able to stream to all three devices at the same time. But currently it
only seems to utilise nst2 tape device, so I get about 80mb/s. Is this
something I can do within networker ? I am phisically on a trunked 2GB
network pipe so in theory my bottle neck will always be the tape
devices, but it would be nice to max all 3 of them out and spped my
backups along.
Any help would be greatly appreciated.
Networker 7.3.2
Linux RH Server
Gig Network
Mulitple OS Platform
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