Virtual Storage Access Method
IBM DISK FILE STORAGE ACCESS METHOD
VSAM; Virtual Sequential Access Method; Virtual sequential access method; Virtual storage access method
<
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)