RE: DDM experiences

[rob@xxxxxxxxx]

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Since we have hundreds of related files in our ap's we use SAVLIB/RSTLIB.
And with a two 3590's being used by 3 iSeries it goes pretty quick.

Rob Berendt
--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
Benjamin Franklin




"Goodbar, Loyd (AFS-Water Valley)" <LGoodbar@afs.bwauto.com>
Sent by: midrange-l-admin@midrange.com
06/06/2002 02:45 PM
Please respond to midrange-l


        To:     "'midrange-l@midrange.com'" <midrange-l@midrange.com>
        cc:
        Fax to:
        Subject:        RE: DDM experiences


I have a somewhat-related question.
Today, we have a single box with production and test libraries. It works,
but is scary sometimes. During the next upgrade cycle (6-12 months away)
we
plan to either 1) upgrade to a bigger box to LPAR or 2) upgrade a little
less and get a separate development machine.
I am interested in a strategy to refresh the test database from
production.
I'm leaning toward DDM, but haven't used it before. Does it make near
real-time updates, or batched? Can it be batched or periodic updates? We
have some fairly large and high-volume files we would keep updated. I'm
not
looking toward a mirroring solution today, just a way to get data from a
production machine/partition to a test machine/partition.

TIA,
Loyd

-----Original Message-----
From: Buck Calabro [mailto:Buck.Calabro@commsoft.net]
Sent: Thursday, June 06, 2002 2:12 PM
To: midrange-l@midrange.com
Subject: RE: DDM experiences


>I am looking for some feedback and/or
>experiences with DDM files.

Classic trade-off between 'fast to deploy', 'easy to use' and 'fast
performance'.  Pick any two and the other one suffers.

>My previous experience using them
>was so-so and at least 8 years
>ago or so.

'So-so' doesn't really describe the issues you encountered. Fundamentally,
DDM files are unchanged from S/38 days.  There are a few more objects that
DDM can use, but nothing mind-boggling.

We have a low-volume in-house application that used to run on machine A.
Then we got machine B and some developers sign on to that box exclusively.
DDM files were the simplest answer to this conundrum (database on one box,
programs on two.)  When I say low volume, I mean a few hundred
transactions
a day.  Hasn't needed changes since it was implemented 6 years ago.
  --buck
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