The only way I know to clone more than one save set it to use a script to
split your cloning process so that it uses multiple tape drives (requires at
least 4 tape drives btw).  You have to be careful how you write the script
though.  For example, if you have the following source saveset group that
you want to clone:

Saveset "group" A
  Saveset 1 on tape 1
  Saveset 2 on tape 2
  Saveset 3 on tape 2
  Saveset 4 on tape 3

Saveset "group" B
  Saveset 7 on tape 1
  Saveset 8 on tape 4
  Saveset 9 on tape 3

Then you can see that you could get into a situation that while the script
which clones group "A" is running, the script that is cloning group "B"
might have to wait because it wants to clone a saveset on a tape that is
currently being used by the first script.

To solve this, you have to know what tapes each saveset you want to clone
sits on, and because a saveset can be split across multiple tapes, you have
to be extremely careful in how you write your script.

David


-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTMAIL.TEMPLE DOT EDU] 
On
Behalf Of Matt Cowger
Sent: Thursday, October 28, 2004 9:51 PM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: Re: [Networker] Cloning performance

Yes, the builtin cloner does one saveset at a time.  Most end up writing
a script to do their cloing from the command line using nsrclone.  You
pass the saveset IDs to nsrclone (as many as your system can support),
and it will do more than 1 at a time.



Craig Ruefenacht wrote:
> I'm gonig to chime in here because I just recently started using
> cloning.
>
> Our Networker server, v6.1.3, is on a HPUX 11i connected to a
> SpectraLogic 64000 with 4 AIT-3 drives.
>
> I have a savegroup that runs and performs a full save of three
> machines.  There are about 20 disks total being backed up, going to two
> AIT-3 media.  So I end up with about 20 savesets, 300 Gbyte total.  I
> use multiplexing on my backups, set to 4 per drive.
>
> I have recently enabled automatic cloning and have noticed that the
> savesets are cloned one at a time (i.e., I see "cloning session: 2 of 20
> save set(s)...." messages).  It isn't currently a big concern for us
> because the cloning currently doesn't interfere with any other backups.
>
> Some have mentioned that you can clone multiple savesets at once (and in
> fact that it was the default), not just one at a time.  So how does one
> go about doing that exactly?  It would appear that the default cloning
> method for a savegroup, if doing automatic cloning, is to do one saveset
> at a time, at least for my installation.
>
>
>
> --
> Craig Ruefenacht
> UNIX Systems Administrator
> USANA Health Sciences
> http://www.usana.com
>
> --
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Note: To sign off this list, send a "signoff networker" command via email
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