ADSM-L

Re: Effect of multiple migration processes to a collocated pool - serial or parallel node migration ?

2003-07-30 06:44:08
Subject: Re: Effect of multiple migration processes to a collocated pool - serial or parallel node migration ?
From: Karel Bos <Karel.Bos AT NUON DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 30 Jul 2003 12:43:48 +0200
Its option 2.

Regards,

Karel
> -----Oorspronkelijk bericht-----
> Van: PAC Brion Arnaud [mailto:Arnaud.Brion AT PANALPINA DOT COM]
> Verzonden: woensdag 30 juli 2003 12:28
> Aan: ADSM-L AT VM.MARIST DOT EDU
> Onderwerp: Effect of multiple migration processes to a
> collocated pool -
> serial or parallel node migration ?
>
>
> Hi list,
>
> A quickie one : when migrating multiple nodes data from
> non-collocated disk pool to collocated tape pool, using
> migproc=2, in which order will data be migrated ?
> 1) node 1 data on 2 different tapes, then node 2 data on 2
> different tapes etc ....
> 2) node 1 data on one tape and node 2 data on another tape,
> then node 3 data on another tape etc ....
>
> I would tend to say 1) is the right response, as the order of
> nodes processed is per largest amount of data in the disk
> storage pool, but wanted to make it sure ...
> If my assumption is right, is there any way achieving
> parallel mounts for nodes migration (option 2)  instead of
> serial mounts (option 1) ? This would avoid waste of tapes (2
> tapes created for 1 node migrated, in a collocated pool looks
> strange  to me), and also from time (tape reclamation will
> probably recombine those tapes to a new one after a while)
> Thanks in advance !
> Regards.
>
> Arnaud
>
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