Networker

Re: [Networker] Another oddball cloning question - cloning clones this time...

2008-07-17 00:22:27
Subject: Re: [Networker] Another oddball cloning question - cloning clones this time...
From: Tim Nicholson <tim AT MAIL.USYD.EDU DOT AU>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Thu, 17 Jul 2008 14:20:00 +1000
You cannot clone to a backup/archive pool.  But you can stage to one,
but that deletes the one it is copying from.  If you have a third
clone pool (on a disk device perhaps), clone to that pool, and then
stage to the backup/archive pool.

An alternate, is to create another clone pool which is kept onsite.
Then clone to it.

An extra point is that recovers usually use the earliest created clone
instance (lowest number cloneid). This means that the copy that you make
to keep onsite would not be used unless it was already mounted on a
tape drive, instead preferring the copy which is offsite.  Not very
nice.  However, there is a rather hidden option to nsrmm
which allows you to set a flag on the volume (which I have not found
a way to read) called "offsite".  This causes recovers to avoid that
copy if possible.
So
   nsrmm -o offsite volume
will set the offsite flag on that instance of the saveset.




On 17/07/2008, at 4:03 AM, Valdis Kletnieks wrote:

I've got a pretty good handle on how to take a backup or archive pool,
and take tapes or savesets in that pool and clone them into a backup clone
or archive clone pool.

However, I'm not finding much on how to do the reverse - given a selection of tapes/savesets in the clone pool, re-cloning them back into the original
pool.

Application - consider a locally stored pool, and an off-site clone pool that's a pain to retrieve a tape from. Now a tape in your local pool goes bad/lost/whatever, and you want to regenerate it because you need to have
an onsite and an offsite copy....

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Tim Nicholson
Network Services
Information and Communications Technology
The University of Sydney
University Computing Centre H08, University of Sydney NSW 2006
T: +61 2 9351 6000  |  E: tim AT mail.usyd.edu DOT au

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