Sample program of how to write vsam file in cobol

megha.bargaje · New User Joined: 01 Aug 2006 Posts: 3 Location: pune

can anyone give me sample program of how to write vsam file in cobol.
and y free space neessry in ci

WARNING: TITLE EDITED

Deepa.m · New User Joined: 28 Apr 2005 Posts: 99

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