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Sample program of how to write vsam file in cobol

 
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megha.bargaje

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Joined: 01 Aug 2006
Posts: 3
Location: pune

PostPosted: Mon Aug 28, 2006 1:59 pm    Post subject: Sample program of how to write vsam file in cobol
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can anyone give me sample program of how to write vsam file in cobol.
and y free space neessry in ci

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Deepa.m
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Joined: 28 Apr 2005
Posts: 99

PostPosted: Mon Aug 28, 2006 2:15 pm    Post subject:
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freespace are necessary to expand the control interval block .as we know VSAM files ,the records are stored in sorted order and when it is required to insert few rows in that block we need free space to accomodate that.

eg : new row to insert is 2007.. Since we have got FS in II CI block we can insert 2007 in II block directly thereby avoiding the complete sort process if we have to add at the end

I block
1000
1001
1003
FS
....
II block
2005
2006
FS
...
III block
3000
3001
FS


This is what my understanding is ..let me know if I am wrong
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