ADSM-L

Adaptive Subfile Backup and File Servers

2005-12-27 20:50:35
Subject: Adaptive Subfile Backup and File Servers
From: Steven Harris <steve AT STEVENHARRIS DOT INFO>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 28 Dec 2005 11:50:33 +1000
Hi All

Compliments of the season to all our regulars!

I have a client with a largish file server  on a Windows 2000
Cluster.  Analysis of a recent schedlog shows that on this particular
day, 87% of the data backed up was .pst files, something that I'm
sure is rather common where Outlook is the mail client.

Now the obvious suggestion is to use Adaptive Subfile Backup for
these and only back up the bits that have changed, but my boss
pointed out that the Adaptive subfile whitepaper suggests that its
use is not indicated for file servers.  The reason given for this is
that ASB cannot restore windows acls.  Now on this file server all of
the .pst files that I looked at inherited their permissions from
their parents so, I'm thinking that for the average Joe user, this
limitatioon would not be an issue. All restores on this system would
normally be done by the administrator anyway.

So, is the recommendation in the white paper correct?  Do any of you
use Adaptive Subfile with .pst files on file servers and if so have
there been any issues?

Also two supplementary questions.  The next largest category  of
backups on this server is access databases.  Again the whitepaper
recommends against using adaptive subfile on these.  Might I ask the
same questions for .mdb files?

Finally, I was looking at a Dave Canaan slide show from a 2003 Share
conference where he explained how ASB works.  There is one line in
the powerpoint that states that Adaptive Subfile is also available
for Exchange.  I've searched through the TDP for Exchange
documentation and can find no reference.  Was this just a typo, a
deleted feature or what?

Regards and felicitations

Steve.

Steven Harris

AIX and TSM Administrator,
Brisbane Australia
steve AT stevenharris DOT info

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