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IBM 390 - OS/390 v2.6 to Z/OS conversion

 
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siddheart22

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Joined: 09 Oct 2006
Posts: 19
Location: Toronto

PostPosted: Tue Nov 27, 2007 3:55 pm    Post subject: IBM 390 - OS/390 v2.6 to Z/OS conversion
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Hi,

The operating system on which my application runs (and several other applications) is going to convert from IBM 390 - OS/390 v2.6 to Z/OS. The application mainly has PL/I and assembler code.

Could someone from this forum suggest how should we go about it?

Thanks,
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joepie meloenie

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Joined: 28 Nov 2007
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Location: amstelveen

PostPosted: Thu Nov 29, 2007 2:58 am    Post subject:
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you can look here: http://www.cornerstone.nl/
they convert anything to anything....
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dick scherrer

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PostPosted: Thu Nov 29, 2007 3:21 am    Post subject:
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Hello,

FWIW, this topic is not really a convesion. It is an Operating System version/release upgrade.
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siddheart22

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PostPosted: Thu Nov 29, 2007 12:38 pm    Post subject: Reply to: IBM 390 - OS/390 v2.6 to Z/OS conversion
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Thanks for the response so far.

Joepie: The upgrade would be done by IBM, but through this forum I would like to know what are the changes required for my application to comply with this new OS.

Nonetheless, I was hoping to see a response on "THINGS TO DO" for this upgrade, reckoning that the application is using PL/I & Assembler.

Essentially, I would want my application to run "AS IS" after the upgrade completes. And to ensure this, I shall be running compares between Before image (output created using loads running on current OS) and After image (output created using loads running on z/OS). Both should match.

Now, my question here is that as part of this upgrade will I have to make any changes to my PL/I or Assembler code? Will this new OS, not support some of the keywords of the above two languages? Will I have to change the compiler options? Will my access modules require change? Will a change be required for my databases (IMS/DB2)?

Disclaimer: I understand that this question may not completely fit on this forum, but I was not sure where else should I place this.

Thanks,
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enrico-sorichetti

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Joined: 14 Mar 2007
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Location: italy

PostPosted: Thu Nov 29, 2007 1:30 pm    Post subject: Reply to: IBM 390 - OS/390 v2.6 to Z/OS conversion
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Usually for this kind of migration/upgrades, the group responsible for it
should issue to all the interested parties a document with "things to do"

We do not know about Your applications, coding styles, any PECULIARITIES,
of Your environment,
but as a general point nothing should change from a developer point of view,
other than gradually become aware of the opportunities the new system will provide in order to exploit them
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dick scherrer

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PostPosted: Thu Nov 29, 2007 8:50 pm    Post subject:
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Hello,

As IBM will be doing the upgrade, they will have information on application considerations ("to do lists"). If there are any, you will want a list of features that are no longer supported.

Given that your code all currently works, it should continue to work in the new environment. There will be new features that the existing code will not take advantage of.

Quote:
compares between Before image (output created using loads running on current OS) and After image (output created using loads running on z/OS). Both should match
Keep in mind that much of the data may contain date information and this may need to be considered when comparing before and after values.
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