ADSM-L

Re: [ADSM-L] export/import nodes

2008-11-21 05:01:37
Subject: Re: [ADSM-L] export/import nodes
From: Henrik Ahlgren <pablo AT ELMA DOT NET>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Fri, 21 Nov 2008 12:00:40 +0200
thanks for comments so far.

Yeah, but wouldn't that lead to an empty node in the target server? Of
course I want to migrate the data, I just don't like the idea of
copying ten tapes worth of data to a set of temporary tapes and then
again to new storage pool tapes (I have not tried it yet, but I assume
TSM doesn't just use the export tapes as stgpool tapes, right?), if I had the
possibility to just move the DB entries and keep the data in the tapes
it was in the first place. I mean, with reusedelay and all, I would
have the same data in 30 tapes instead of 10 for some time (not counting
copypools volumes). Multiply that for couple of nodes, and soon you
run out of library space. Well, at least it would have the side effect
of reclamation.

I guess the next best thing to do would be to use FILEs on disk.

Imoprting the whole DB to a new server is also a nice hack, but I
would like to start from scratch, since I'm planning an upgrade from
prettyy ancient TSM version with DB that have lived for about eight
years.

BTW, I haven't heard or noticed before that TSM might not adhere
collocation in case of running out of scratch volumes. Is that
behavior version dependend? I believe everyone runs out of scratch
volumes every now and then...

On Fri, Nov 21, 2008 at 06:51:23AM -0200, Leandro Mazur wrote:
> I think you can use the command export node with the parameter
> filedata=none. Example:
> 
> export node test filed=none tos=server1
> 
> Please, correct me if I'm wrong.
> 
> On Thu, Nov 20, 2008 at 9:13 PM, Wanda Prather <wprather AT jasi DOT com> 
> wrote:
> 
> > You can't copy just some DB entries.
> > Other people have reported success with restoring the TSM DB to the new
> > server, then deleting the unwanted filespaces/nodes on the new server.
> >
> > But you need to review your tape inventory carefully.  The fact that your
> > storage pool is collocated doesn't mean that tapes necessarily have data
> > for
> > only one client.  If there was ever a day where you ran short of scratch
> > tapes, TSM would have started stacking multiple clients per tape.
> >
> >  I'd recommend checking each tape before moving it would be a good plan.
> >  If
> > there are multiple nodes on a tape, you can use MOVE DATA to force the data
> > to other volumes in the storage pool; if scratch tapes are available,
> > collocation will be honored on output.  I think that would be less trouble
> > than cleaning up the mess after a move.

-- 
Terveisin

Henrik Ahlgren
Technical Manager
Itella Information Oy

Tietäjäntie 2
FI-02130 Espoo
GSM +358-50-3866200

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