Virtual Storage Access Method

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(VSAM) An IBM disk file storage scheme first used in S/370 and virtual storage. VSAM comprises three access methods: Keyed Sequenced Data Set (KSDS), Relative Record Data Set (RRDS), and Entry Sequenced Data Set (ESDS).

Both IMS/DB and DB2 are implemented on top of VSAM and use its underlying data structures.

["Storage" or "Sequential"?]

Last updated: 2002-07-26

Nearby terms:

Virtual Software Factory ♦ Virtual Storage Access Method ♦ Virtual Storage Extended

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