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Need an Analysis document for large cobol programs

 
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sandeep kumar302

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Joined: 14 Mar 2012
Posts: 69
Location: India

PostPosted: Thu Jan 23, 2014 10:21 am    Post subject: Need an Analysis document for large cobol programs
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Hi all,
I am working in a migration project in which i have to replace the IDMS by DB2. I have a cobol program which is calling a subprogram which used IDMS and then returns the data to the calling program.At high level, now my task is to replace the IDMS by DB2.

To achieve the above purpose, i need to first analyse the existing program which is quite large( more than 2000 lines of code). The program uses more than 10 files( flat as well as VSAM files), more than 20 copybooks and the program is calling so many subprograms including the subprograms which are using IDMS to fetch the data.

Can someone please share an analysis document to analyse the large cobol programs and give me suggestions on how to proceed. The problem with me is that i have close to 2.5 years of experience in Mainframe and the program is very large to maintain the logic flow.

Please advice me on how to procced and please share any analysis document.

Thanks a lot.
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sureshpathi10

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Joined: 03 May 2010
Posts: 154
Location: Kuala Lumpur

PostPosted: Thu Jan 23, 2014 12:41 pm    Post subject:
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Hi Sandeep,

I know it is always headache to understand somebody's code. Did you check with your colleagues whether they have any documentation for the old code ?

if don't, the easiest way would be preparing flowchart/functional specification side by side while you analyze. You won't get lost in the middle and It might help you in the future reference also.
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sandeep kumar302

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Joined: 14 Mar 2012
Posts: 69
Location: India

PostPosted: Thu Jan 23, 2014 1:14 pm    Post subject: Reply to: Need an Analysis document for large cobol programs
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Thanks sureshpathi10.

Appreciate your suggestion.
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prino

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Joined: 07 Feb 2009
Posts: 1060
Location: Oostende, Belgium

PostPosted: Thu Jan 23, 2014 3:08 pm    Post subject: Re: Need an Analysis document for large cobol programs
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sandeep kumar302 wrote:

... i need to first analyse the existing program which is quite large( more than 2000 lines of code)...

You really don't know the meaning of large...

Pity it's not PL/I, I have an edit macro that shows you an outline of programs written in that language.
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Pandora-Box

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Joined: 07 Sep 2006
Posts: 1542
Location: Andromeda Galaxy

PostPosted: Thu Jan 23, 2014 3:27 pm    Post subject:
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Sometime back : I used a tool called REVOLVE.It would just draw flowchar for a given program
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sandeep kumar302

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Joined: 14 Mar 2012
Posts: 69
Location: India

PostPosted: Thu Jan 23, 2014 4:51 pm    Post subject: Reply to: Need an Analysis document for large cobol programs
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Hi Pandora-Box,
Do the tool REVOLVE cost and if yes then how much.

Hi prino,
For a person who has an experience of 2 years, it will be large. May be as i keep adding experience, this apparently will appear smaller.
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