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IMS to DB2 migration

 
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ashimer

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Joined: 13 Feb 2004
Posts: 551
Location: Bangalore

PostPosted: Fri May 28, 2004 11:56 am    Post subject: IMS to DB2 migration
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Hi all ,
Currently i am working on a migration project .IMS to DB2 .can anyone help me on this with necessary materials ,docs etc .IMS calls and corresponding DB2 converted calls . PLz anyone out there plz help me out .its very urgent .
tia
ashish
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mcmillan

Site Admin


Joined: 18 May 2003
Posts: 1203
Location: India

PostPosted: Sun Jun 20, 2004 1:43 am    Post subject: Re
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Please download the materials from:

www.ibmmainframes.com/downloads.html
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itssreehere
Warnings : 1

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Joined: 10 Jan 2006
Posts: 65
Location: chennai

PostPosted: Thu Jan 12, 2006 1:39 pm    Post subject:
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Migrating the programs is not a big deal.But migrationg the existing data in online production critical ims database to DB2 table is a big challenge.

one way is to retire the segments one by one from the bottom to top.For doing that following are the steps usually followed.

1.Currently programs populates ims.
2.After first stage changes. populate ims segments as well as db2 tables.
3.If everything is fine in the next phase stop populating ims db.
4.Change report generations to db2 tables instead of ims db.


In this method historical data will be in ims itself.if you want to load that also in to db2 it is really a challenging task. in most production environments, it should not exceed one night. IT's really impossible to load millions of records in one night to db2 tables, eventhough u submit pationed jobes or high pripority jobs.

Sreejith
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