Portal | Manuals | References | Downloads | Info | Programs | JCLs | Master the Mainframes
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Usergroups Profile Log in to check your private messages Log in
 

 

Conversion IAM to VSAM

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> JCL & VSAM
View previous topic :: :: View next topic  
Author Message
kaarthi

New User


Joined: 16 Jun 2011
Posts: 2
Location: India

PostPosted: Thu Oct 20, 2011 12:40 pm    Post subject: Urgenlty I need of "Converting IAM file to VSAM file &q
Reply with quote

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]
Back to top
View user's profile Send private message

expat

Global Moderator


Joined: 14 Mar 2007
Posts: 8593
Location: Back in jolly old England

PostPosted: Thu Oct 20, 2011 1:25 pm    Post subject:
Reply with quote

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
Back to top
View user's profile Send private message
PeterHolland

Global Moderator


Joined: 27 Oct 2009
Posts: 2422
Location: Netherlands, Amstelveen

PostPosted: Thu Oct 20, 2011 1:27 pm    Post subject:
Reply with quote

http://ibmmainframes.com/about5359.html
Back to top
View user's profile Send private message
kaarthi

New User


Joined: 16 Jun 2011
Posts: 2
Location: India

PostPosted: Mon Oct 24, 2011 11:49 am    Post subject: Reply to: Conversion IAM to VSAM
Reply with quote

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
Back to top
View user's profile Send private message
expat

Global Moderator


Joined: 14 Mar 2007
Posts: 8593
Location: Back in jolly old England

PostPosted: Mon Oct 24, 2011 1:19 pm    Post subject:
Reply with quote

Again I ask, what have YOU tried for yourself so far and what results did you get.
Back to top
View user's profile Send private message
Ronald Burr

Active User


Joined: 22 Oct 2009
Posts: 293
Location: U.S.A.

PostPosted: Mon Oct 24, 2011 7:42 pm    Post subject:
Reply with quote

"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.
Back to top
View user's profile Send private message
dick scherrer

Site Director


Joined: 23 Nov 2006
Posts: 19270
Location: Inside the Matrix

PostPosted: Mon Oct 24, 2011 8:47 pm    Post subject:
Reply with quote

Hello and welcome to the forum,

Quote:
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. . .
Back to top
View user's profile Send private message
enrico-sorichetti

Global Moderator


Joined: 14 Mar 2007
Posts: 10202
Location: italy

PostPosted: Mon Oct 24, 2011 8:50 pm    Post subject: Reply to: Conversion IAM to VSAM
Reply with quote

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 icon_evil.gif
Back to top
View user's profile Send private message
Ronald Burr

Active User


Joined: 22 Oct 2009
Posts: 293
Location: U.S.A.

PostPosted: Mon Oct 24, 2011 9:10 pm    Post subject:
Reply with quote

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!
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> JCL & VSAM All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts File Aid to File Manager conversion murali3955 IBM Tools 4 Thu Nov 24, 2016 3:41 pm
No new posts BWO option in VSAM blayek CICS 3 Sat Nov 05, 2016 10:47 am
No new posts Conversion of a VB file to FB. isssal DFSORT/ICETOOL 1 Mon Oct 31, 2016 10:23 pm
No new posts VSAM define for large file jerryte JCL & VSAM 9 Wed Oct 05, 2016 1:51 am
No new posts CICS VSAM RLS READ akodakka CICS 3 Tue Oct 04, 2016 3:09 pm


Facebook
Back to Top
 
Mainframe Wiki | Forum Rules | Bookmarks | Subscriptions | FAQ | Tutorials | Contact Us