Networker

Re: [Networker] Why can't legato restore files the same way it backs them up?

2003-07-16 15:57:59
Subject: Re: [Networker] Why can't legato restore files the same way it backs them up?
From: Jody Gregersen <Jody.Gregersen AT VISHAY DOT COM>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Wed, 16 Jul 2003 15:57:20 -0400
Thanks for the striped_recover trick.

The ssid recover is not a good option in this case because we back up using
sap r/3 module and each ssid is one file.

What I was thinking of doing next was to do an mminfo and figure out what
files are on each tape and then running 4 CLI recover's at a time specifying
each file on each of the 4 tapes.  Does anyone use this type of recover?
Anyone have any comment on how they think this type of recover might work?

Unfortunately one of my tape drives is out of commission right now or I'd
try the striped_recover trick.  The backup takes 8 tapes and I only have 7
drives at the moment.

Thanks,

Jody

Jody Gregersen
Infrastructure Engineer
Vishay Intertechnologies, Inc.

-----Original Message-----
From: David E. Nelson [mailto:david.nelson AT ni DOT com]
Sent: Wed, July 16, 2003 2:30 PM
To: Legato NetWorker discussion; Jody Gregersen
Subject: Re: [Networker] Why can't legato restore files the same way it
backs them up?


Hi Jody,

Aside from the '/nsr/debug/striped_recover' trick (SWEEEET!). Quite often we
recover 500 GB by specifying multiple SSID's via the CLI.  ie. 'recover -s
lgto_server -d /some/remote/path -S 1234 -S 6789 -S 9876'.

This atleast reads/restores streams that were written in parallel on the
same
volume.

Regards,
        /\/elson


On Wed, 16 Jul 2003, Jody Gregersen wrote:

> Hi all,
> I'm having trouble trying to figure out why legato can't reverse engineer
> the way it backs up files to the way it restores files.  Why can't they
set
> it up to read from the same amount of tapes as it writes to?  Are they
> planning to add this to the code at any time?  Basically what I'm asking
is
> that if it writes in streams, why can't it read in streams?  I've been
> recovering 500 gig of data for the last 2 days and I have to turn around
and
> do it again as soon as this one's done.  I understand that the parallelism
> and target sessions during the backup can be optimized for a restore but
> then it would take me 48 hours to back up the data.
> Thanks for any input,
> Jody
>
> --
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