ADSM-L

Re: Large Fileserver Recovery

1997-04-03 07:13:09
Subject: Re: Large Fileserver Recovery
From: "Pittson, Timothy ,HiServ/US" <tpittson AT HIMAIL.HCC DOT COM>
Date: Thu, 3 Apr 1997 07:13:09 -0500
Gavin,
        Have you tried running multiple concurrent restore operations from the
same client - this would help your recovery time quite a bit.   For
Unix, you can do this on the filesystem level, for Netware and NT, you
could break it up by volume name/drive letter.

Tim Pittson
tpittson AT himail.hcc DOT com

>----------
>From:  Gavin Ring/AALC/AlcatelAustralia[SMTP:gavin.ring AT ALCATEL.COM DOT AU]
>Sent:  Thursday, April 03, 1997 4:43 AM
>To:    ADSM-L AT VM.MARIST DOT EDU
>Subject:       Large Fileserver Recovery
>
>After testing ADSM and similar products to backup our distributed
>fileservers,
>we would like to adopt  ADSM as our enterprise backup/restore solution.
>
>However,  ADSM does not cover our requirement of being able to restore a
>fileserver in less than one day.
>
>The duration of a complete fileserver restore from our ADSM MVS server
>(2.1.012) across an FDDI network to a large fileserver (100+ GB) is excessive
>.
>
>This is due to a large number of small size files (<100KB) resulting in a
>throughput of around 1 GB/hr.
>
>Co-location is implemented at the filespace for these fileservers.
>
>To cover this requirement, we need to supplement ADSM with a another
>backup/restore solution that performs a fast restore on the occasions when
>large volumes of data need to be restored.
>
>I am sure some of you have encountered the same problem with similar
>environments to ours, and I would like to know what you have implemented to
>provide fast system restores.
>
>Our large fileserver clients are:
>
>Solaris 2 ( being migrated from SunOs)
> HP-UX 9 (migrating to HP-UX 10)
>Windows NT 4.0
>
>We would particularly be interested in
>
>1.  The backup software used
>2.  The automated tape library that the backup software talks to
>3.  What restore performance was achieved, particularly for files less than
>100KB
>4.  Is it compatible with inactive files migrated by ADSM (HSM) ?
>      i.e. when a backup is being performed by the backup software, does it
>backup the file stub on disk and not generate a HSM recall
>
>TIA Gavin
>
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