slovodefinícia
access method
(foldoc)		access method

1. The way that network devices access the
network medium.

2. Software in an SNA processor that controls the flow of
data through a network.

[physical layer?]

(1998-03-02)
podobné slovodefinícia
indexed sequential access method
(foldoc)		Indexed Sequential Access Method
ISAM

(ISAM) An IBM file management system allowing
records to be accessed either sequentially (in the order they
were entered) or via an index. Each index orders the records
on a different key.

ISAM was followed by VSAM (Virtual Storage Access Method)
and pre-dated relational databases.

(2003-07-13)
queued sequential access method
(foldoc)		Physical Sequential
QSAM
Queued Sequential Access Method

(PS, QSAM, Queued Sequential Access Method) The
simplest data set on an IBM mainframe. Sequential files
can only be read or written from the beginning: they do not
support random access.

[Why "Queued"?]

(2003-12-05)
virtual sequential access method
(foldoc)		Virtual Storage Access Method
Virtual Sequential Access Method
VSAM

(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)
virtual storage access method
(foldoc)		Virtual Storage Access Method
Virtual Sequential Access Method
VSAM

(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)
virtual telecommunications access method
(foldoc)		Virtual Telecommunications Access Method
VTAM

(VTAM) A data communications access method compatible with
IBM's Systems Network Architecture.

[More detail?]

(1995-01-30)

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