Sequiential, Relative and Indexed files vs VSAM

msnreddy · New User Joined: 09 Jun 2004 Posts: 4 Location: Bangalore

Hi

We have Sequiential,relative and indexed files in COBOL.VSAM also having that files is there any added advantage is there?

gkchakri · New User Joined: 07 Jun 2004 Posts: 9 Location: Bangalore

HAI,

I find only one difference going to Sequential file, In VSAM sequential files are of ESDS-Entry Sequential Data Sets:
In which Random Accessing is possible by RBA(Relative Byte Address).
which a general sequential file doesn't have.

if you get any more differrences, plz let me know it.

bye,
gkchakri

priya · Posted: Sat Jul 03, 2004 12:59 am

Dear,

You can create files in Non- VSAM entries also using QSAM, BDAM and ISAM. But files created with VSAM (ESDS, RRDS, KSDS) are more sequired, independent and can be accessed faster comparing non-vsam files.