The Virtual Storage Access Method (VSAM) represents IBM's most widely used data storage facility. Getting Into VSAM is a self-study manual and technical reference source that comprises a comprehensive and practical introduction to VSAM. The author discusses direct access storage devices, the history of the development of VSAM, VSAM's purpose and benefits, the three different VSAM file types and their similarities to other access methods, how space is allocated and how data is formatted. Chapters also cover how VSAM keeps track of data, the structure of an index record, the structure and function of the VSAM catalog and the many commands available through Access Methods Services (AMS) to mold VSAM to your particular requirements. There is also practical advice on recovering from and preparing against disaster, security of data files and passwords, and accessing VSAM through COBOL, PL/1 and the Assembly Language.
Auflage
International 2 Revised ed
Sprache
Verlagsort
Verlagsgruppe
Zielgruppe
Für höhere Schule und Studium
Für Beruf und Forschung
Illustrationen
Maße
Höhe: 230 mm
Breite: 150 mm
Gewicht
ISBN-13
978-0-471-63297-9 (9780471632979)
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Schweitzer Klassifikation
Overview of Direct Access Devices; Access Methods; VSAM--An Overview; The Three Faces of VSAM; File Processing Using VSAM; The VSAM Catalog and Data Spaces; Access Method Services--Basic Functions; Access Method Services--Commonly Used Functions; Access Method Services--Alternate Indices; Access Method Services--Special AMS Facilities; Back-Up and Disaster Recovery; Security and Passwords; Space Calculations; VSAM--Advanced Processing Options; Accessing VSAM through Cobol and PL/I; Using Vsam in Assembler Language; Performance and Tuning; Appendixes; Index.
