shanker

• Nov 9th, 2006

 

It is efficient,high performance tool,allows backup and recovery,provides data security and integrity.

KF

• Nov 16th, 2006

 

Why did VSAM come into existance?

Think DOS VS! Using VSAM was much, much easier than coding masses of inflexible DLBL and EXTENT cards for running jobs in DOS VS.

dhs01

 Profile Answers by dhs01 

• Apr 15th, 2009

 

VSAM was written as a replacement for ISAM. The main problem with ISAM was that if there were many insertions and deletions the way he chained the entries was horribly inefficient. VSAM through the use of splitting CIs was a hugh improvement.