Vsam Tutorial

What is VSAM tutorial?

VSAM stands for Virtual Storage Access Method. VSAM runs and supported by MVS, ZOS and OS/390 operating systems. It was developed by IBM in 1970's. It is used to organize data in form of files in Mainframes. VSAM is mainly applicable in COBOL and CICS in Mainframes to store and retrieve data.


This tutorial is mainly useful for to understand the VSAM concepts and it gives basic understanding on VSAM to go to the next level.


To learn this tutorial one must have a basic understanding of JCL and COBOL. Having familiar with file handling method and VSAM concepts will be useful.

Vsam Basics A Brief Description Of Vsam Vsam Functions By Release Level What Is Vsam Major Vsam Parts Vsam Terminology And Concepts Vsam Data Set Organizations Comparing Vsam Data Set Organizations Choosing A Vsam Data Set Type Extended Format Data Set Extended Addressability Data Striping Processing A Vsam Cluster Vsam Exploiters Performance Introduction Service Level Agreement Transaction Performance Performance Management Vsam Performance Management Vsam Rule-of-thumb Mode Parameters Affecting Performance Vsam Performance By Scenarios Vsam And Ess Controllers Performance Monitors Vsam Problem Determination And Recovery Vsam Problem Determination Hints And Tips Some Common Vsam Problems What Documentation To Collect How To Recover A Damaged Vsam Data Set Prevention Is Better Than Cure Idc3009i Message Idcams Listcat Output Fields Smf Record Types Related To Vsam Data Sets Rrms And Vsam Managing Your Vsam Data Sets Reorganization Considerations New Index Ci Size Calculation Algorithm Sharing Vsam Data Sets Extended Addressability (ea) Catalog Search Interface Major Sources Of Vsam Processing Options Media Manager, Open, Close, Eov In Vsam Vsam And 64 Bits Special Considerations For Cobol Users And Smb Vsam Record Level Sharing Introducing Vsam Rls Rls Terminology Planning For Rls Implementing Vsam Rls Rls Problem Determination And Recovery Rls Enhancements Rls Performance Dfsmstvs Introducing Dfsmstvs Why Dfsmstvs? Some Definitions Cics Support For Recoverable Vsam Dfsmstvs Overview Our Experiences With Implementation Dfsmstvs Problem Determination Tips Vsam Interview Questions Vsam Practice Tests