virtual storage access method

1 definition found

virtual storage access method - Free On-line Dictionary of Computing (26 May 2007) :

  Virtual Storage Access Method
  Virtual Sequential Access Method
  VSAM
  
     <database> (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"?]
  
     (2002-07-26)