ADSM-L

Re: Large Fileserver Recovery

1997-04-02 20:31:15
Subject: Re: Large Fileserver Recovery
From: Taylor Mitchell <Taylor_Mitchell AT MSN DOT COM>
Date: Thu, 3 Apr 1997 01:31:15 UT
You may want to explore CNT's Filespeed.    Their URL
is www.cnt.com.  The product is designed to move data
from servers to MVS systems.

The product consists of a hardware unit that has a F/W SCSI
interface on one side, an ESCON interface on the other and a software
component that executes on MVS.    We have
not evaluated the product, but if the product lives up to CNT's
claims, it could be a useful option for someone with a high
throughput requirement.  From what I have read, the product
does not have anywhere near the feature set of ADSM,
but if you need speed it may be worth a closer look:

CNT claims a throughput of 8MB/sec for the product.

Taylor Mitchell

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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