Networker

Re: [Networker] How to use differente tapes / per saveset / per c lient ?

2005-11-23 16:53:33
Subject: Re: [Networker] How to use differente tapes / per saveset / per c lient ?
From: "Willeat, Todd" <TWilleat AT MHP.SMHS DOT COM>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Wed, 23 Nov 2005 15:52:10 -0600
If the client parallelism is 4, that is as many streams as a client can
send.

-----Original Message-----
From: Legato NetWorker discussion
[mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]On Behalf Of Manel Rodero
Sent: Wednesday, November 23, 2005 3:45 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] How to use differente tapes / per saveset / per
client ?


Hello,

I would like to know if is it possible to use two or more simultaneous
devices (tapes) to backup different savesets from a same machine.

I ask this because I have a "problem" in this environment:

- 1 Server:
        Windows 2000 7.1.2.Build.325
- 5 Clients:
        AixOS 7.1.2.Build.325
        2 x Solaris 7.1.2.Build.325
        Linux 7.1.2.Build.325
        Windows 2000 7.1.2.Build.325

The server has 3 SDLT320 drives, Server parallelism = 15, Target sessions
per tape = 5, Client parallelism = 4 and Priority = 500 for all five
clients.

I run a group with these five clients to do a full backup of these savesets:

- Aix: 14 savesets
- Solaris: 2 savesets
- Solaris: 10 savesets
- Linux: 8 savesets
- Windows: 6 savesets

The backup starts ok, it runs at full speed using the maximum bandwith of
the Legato server (at this moment 100Mbps) and USING THE 3 DRIVES!

After some hours, all but one client -the Aix one- has finished the backup.
The "problem" is that at this time, Legato is doing the backup of 4 sessions
using ONLY 1 DRIVE (the other 2 doesn't have nothing to do). This client has
8 more savesets pending.

The questions is: why Legato doesn't use the other 2 drives to backup the
remaining 8 savesets instead of waiting for the current sessions and use
only 1 drive again? The selection of a drive isn't done by saveset? Is this
selection done by client? At the begining of the group backup?

Any idea about this situation will be very helpful.

Thank you very much.


--

o o o  Manel Rodero                   | LCFIB - UPC
o o o  Helpdesk Manager               | Campus Nord - Modul B6
o o o  Laboratori de Calcul           | Jordi Girona, 1-3
U P C  Facultat Informatica Barcelona | 08034 Barcelona (Spain)
                                      |
       manel AT fib.upc DOT edu              | Tel: +00 34 93 401 6940
       http://www.fib.upc.edu/~manel  | Fax: +00 34 93 401 7040 

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