VSAM Overview
![]() |
![]() |
|
![]() |
||
VSAM Management
Virtual Sequential Access Method is a data storage methodology used on OS/390 mainframes. When VSAM was new, it was considered to be complex, but with a little bit of effort, it is easy to work with and tune. VSAM is the underlying method for most database files. VSAM is explained in the following pages
- Understanding VSAM file types
- Getting information about VSAM files
- VSAM performance tuning
- IAM, a VSAM alternative
Use the left hand frame to navigate round the pageset


