Networker

Re: [Networker] How do I minimize recovery time?

2003-06-17 20:26:06
Subject: Re: [Networker] How do I minimize recovery time?
From: sellars <ssellars AT ADELPHIA DOT NET>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Tue, 17 Jun 2003 20:26:20 -0400
Disk backups/recoveries are the fastest possible method.  Networker supports
them and with 6x they are inexpensive.  After that the thing to attempt is to
limit parallelism as much as possible and use save set recoveries.

cheers
Stephen

Jody Gregersen wrote:

> Hi,
>
> I'm running Legato 6.1 using Tru64 5.1a on an ES40 attached to an ESL9326
> jukebox with 8 TL891 drives.  We are setting up for a DR test and I would
> like to have the shortest recovery time possible.  We run separate backups
> rather than cloning.  We can get about 500 GB backed up in about 5.5 hours
> using a parallelism of 32 and 8 target sessions per drive (8 streams running
> to 4 tapes simultaneously).  To restore this setup takes about 24 hours.  If
> I run with a parallelism of 16, the backup takes about 8.5 hours.  We
> haven't tried a restore from those tapes.  Does anyone know of an "optimum"
> parallelism for restoring or some equation that could be used to determine
> what a restore time might be?
>
> Thanks,
>
> Jody
>
> Jody Gregersen
> Infrastructure Engineer
> Vishay Intertechnologies, Inc.
>
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