Explain the differences between VSAM and Non-VSAM files

(i) The ISPF panel or a standard JCL is used for creation of a NON VSAM dataset. The AMS program is used to create the VSAM files.

(ii) The information about the Non-VSAM files is stored as dataset labels in the VTOC, while the information of VSAM files is stored in Catalogs.

(iii)The dataset organization's in Non-VSAM files are sequential (physical), Indexed Sequential, Direct and partitioned.

The dataset organization's in VSAM files are Key sequenced, Entry sequenced and Relative record datasets. A dataset is a named collection of physical records stored on a disk or tape, and are normally identified by MVS with special records called labels. In JCL statements we need to supply the label information.

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