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kaarthi
New User
Joined: 16 Jun 2011
Posts: 2
Location: India
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Hi all,
my requirements is that converting IAM files to VSAM files:
what are the steps to do like
1. required only file changes ?.
2. need any program & JCL changes required ?.
if any pls let me thanks in advance.[/b] |
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expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
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DO NOT tag onto the end of an existing thread that bears absolutely no relation to the question that you have.
Exactly what have you researched for yourself regarding this.
What have you tried yourself.
Let us know the problems that you have encountered while trying to do your work rather than asking others to do it for you.
Welcome to the forum |
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PeterHolland
Global Moderator
Joined: 27 Oct 2009
Posts: 2481
Location: Netherlands, Amstelveen
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kaarthi
New User
Joined: 16 Jun 2011
Posts: 2
Location: India
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Hello friend,
my requirements is that, due to IAM licensed.. now we need to convert IAM file to VSAM file. nothing more
pls. help to do this conversion.
thanks.kathi |
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expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
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| Again I ask, what have YOU tried for yourself so far and what results did you get. |
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Ronald Burr
Active User
Joined: 22 Oct 2009
Posts: 293
Location: U.S.A.
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"IDCAMS DEFINE creates an IAM file whenever the OWNER($IAM) parameter is specified, $IAM is placed somewhere in the data set name, or $IAM is part of the Data Class or Storage Class name."
From the above statement, you should be able to figure out exactly what needs to be done for each file you need to convert from IAM to VSAM. |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello and welcome to the forum,
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| pls. help to do this conversion. |
When you post what you tried and what went wrong, someone will be able to help.
I believe you are making this more difficult than it needs to be.
Also as a heads up - the performance may change. . . |
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enrico-sorichetti
Superior Member
Joined: 14 Mar 2007
Posts: 10873
Location: italy
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the real issues are not the lowly technicalities of a simple IDCAMS DEFINE !
don' t You have a storage support group in Your organization ?
they should do the planning and advice on how to proceed  |
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Ronald Burr
Active User
Joined: 22 Oct 2009
Posts: 293
Location: U.S.A.
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As Dick and Enrico point out - performance may change, and there is more to it than a simple change in the DEFINEs. . .
As in:
1) A native VSAM file will probably take more (often much more) dasd space than an equivalent IAM file
2) Processing a native VSAM file will probably require more EXCP's, service units, etc. than an equivalent IAM file
3) Processing a native VSAM file will probably require more CPU time than an equivalent IAM file
4) Processing a native VSAM file will probably require more elapsed time than its equivalent IAM file
5) Since some DEFINE specs (e.g. CISIZE, FREESPC) are "ignored" by IAM (it uses its own, proprietary, storage management routines), you may find that the values specified in the DEFINE are not optimal when applied to native VSAM files
6) Converted IAM files may exceed the 4GB limit imposed for standard VSAM files - thus requiring either file or application changes, or the use of extended format / extended addressability VSAM
You really SHOULD work with your storage group! |
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