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

1. Understanding VSAM file types
2. Getting information about VSAM files
3. VSAM performance tuning
4. IAM, a VSAM alternative

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