Simon,
I can only tell you what we do
W2k master media plus a w2k3 media server (5.1mp4), everything attached
to an ADIC scaler 2000 with 10 drives, SSO shared with master media and
media servers.
The master server is set to use 3 Max Concurrent drives (which means our
master server will never use more than 3 drives even though it "sees"
all 10.
The media server is set to use 6 Max Concurrent drives (which means it
will never use more than 6 drives even though it "sees" all 10.
You notice we always leave one drive available for restores, that may
not be necessary in your case. The way this is set is to insure the load
is split properely during peak periods. (This gave us about a 15% gain
in throughput)
Our maximum multiplexing is set at 3 which means each drive will
multiplex no more than 3 jobs per tape unit. In some circumstances it
may do less than that if that is all that is in the queue. Through a lot
of testing we have found that our environment works best with a maximum
multiplex of 3. However when I set up my policies we set the maximum
multiplexing for 32. The limiting factor is at the library level (3),
but if for some reason we needed to open up (or choke down) the policies
will not need to be edited.
David Spearman
County of Henrico,Va.
-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of WEAVER,
Simon
Sent: Tuesday, March 14, 2006 8:08 AM
To: 'Clooney'
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] Netbackup Disk Tuning
Hi
In the properties for the Master Storage Unit, is it set to use Max
Concurrent Drives Used For Backups set to 4 correctly?
Although 4 drives are available, is it set for 4 to be used in the
properties?
Also, what is set for the Maximum Multiplexing per drive set at??
Thanks
Simon Weaver
Technical Support
Windows Domain Administrator
EADS Astrium
Tel: 02392-708598
Email: Simon.Weaver AT Astrium.eads DOT net
-----Original Message-----
From: Clooney [mailto:d_clooney AT yahoo DOT com]
Sent: 14 March 2006 11:28
To: WEAVER, Simon; veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] Netbackup Disk Tuning
Simon
Not extensively in my opinion , currently running :
Mater server >
2 jobs active to tape ,
2 Q'ed ( spitting out 134's ) until either active job completes
Four drives available on master server , only two used , max jobs set
correctly on both storage unit, global attributes and client
Drives aren't down and tapes not stuck either , alternate drives used
however only 2 at a time and Q'ed jobs give 134's until 1 out of two
jobs complete.
Cant figure the 134's and why 2/4 drives are only being used ,
Media server >
7 jobs to disk > running fine mount on media server.
1 duplication > job running fine to directly attached tape
1 duplication > mounts tape and then hangs on reading > using master
server's storage unit as mentioned above.
Cannot fatham , why only two dives being used and 134's.
Any suggestions would be much appreciated.
Regards
David
--- "WEAVER, Simon" <simon.weaver AT astrium.eads DOT net> wrote:
>
> David
> Do all the backups run at the same time (ie: 7:00pm) - Maybe they can
> be staged? We used to run into 134 a long, long time ago, but since
> backups are staggered through the night, they are long long gone!
>
> Simon Weaver
> Technical Support
> Windows Domain Administrator
>
> EADS Astrium
> Tel: 02392-708598
>
> Email: Simon.Weaver AT Astrium.eads DOT net
>
>
>
> -----Original Message-----
> From: Clooney [mailto:d_clooney AT yahoo DOT com]
> Sent: 14 March 2006 10:43
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] Netbackup Disk Tuning
>
>
> HI All
>
> Scenario:
>
> Master server > HP-UX gbaheu17 B.11.00 U 9000/800
> Media Server > Linux gbahel25.gb.tntpost.com 2.4.21-20.ELsmp Tape
> Library > Storagetek using SN6000
>
> A large portion of backups are written to disk mounted on the media
> server and then disk staged at a later to tape . Along with this there
> are backups that are qritten directly to tape.
>
> I am getting the feeling the master and media server are just too busy
> as there are extremly high number's 219's and a considerable amount of
> 134's ( indicating the server is lacking resoure)
>
> Does anyone have a fine tuning doc for the above master and media
> server to point me in the right direction to try and start overcoming
> the resource hungery environment.
>
> Much appreciated
>
> David Clooney
>
>
>
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