ADSM-L

Beginner question: simple backup to two EXB10 libraries

1997-01-09 12:51:01
Subject: Beginner question: simple backup to two EXB10 libraries
From: Mike Berkley <Mike.Berkley AT EC.GC DOT CA>
Date: Thu, 9 Jan 1997 09:51:01 -0800
I've just recently started using ADSM, and I have a few configuration
questions/comments:

1. We have been backing up all of our systems to a pair of EXB10 8mm
   libraries.  We have purchased a DLT 4700 library, but would like to
   continue using those EXB10s for a copy storage pool.  Can ADSM use
   both libraries in some way to backup the DLT library?


2. I have not been impressed with ADSM's performance so far, but
   suspect I am missing some tuning options.  The initial full backup
   took about 4 days with ADSM and the DLT, when it used to take 36
   hours with a competitor's backup product and the two EXB10s.

   I have configured ADSM to use the default backuppool with two 1GB
   disk volumes and nextpool set to the DLT.

   Upping MOVEBatchsize, MOVESizethresh, and TCPWindowsize have
   helped, but are there some other obvious ways to tune this
   configuration?  I realize that I haven't given much information
   about our setup, but I don't know enough about ADSM yet to know
   where to begin.


3. With the DRM tools, what does OFFSITE mean to ADSM?  At the end of
   a month, I would like to move the DLT volumes to the bank, and have
   ADSM do a complete fullsave of all systems.  It seems silly to
   purchase another DLT4700 just so that I could make backup
   copygroups.  What is the normal way to do this - update the policy
   group mode to absolute?


4. I would like to see a new IBM document for those of us who are more
   used to traditional Unix backup systems:

        "Dump-vs-ADSM: A Dummies Guide to ADSM".

   In one recent comp.unix.aix posting, Ole Nielsen described my
   situation very well:

        ... configuring the ADSM server can be a nightmare.  There is
        an installation manual, but it only covers selected, simple
        topics.  And it doesn't define the terminology, so you often
        don't understand what the whole thing is about.  There is no
        such thing as a "ADSM Server Tutorial" manual, ... You can
        read the ADSM server manual only if you already know ADSM
        inside out, a real boot-strap problem...

   I'm in this very situation now.  I'm beginning to understand the
   ADSM philosophy, but a Dump-vs-ADSM translation and/or a Beginner's
   guide would really help.
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