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Virtual Storage Access Method

Virtual Storage Access Method (VSAM) is an IBM direct-access storage device (DASD) file storage access method, first used in the OS/VS1, OS/VS2 Release 1 (SVS) and Release 2 (MVS) operating systems, later used throughout the Multiple Virtual Storage (MVS) architecture and now in z/OS. Originally a record-oriented filesystem, VSAM comprises four data set…

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Virtual Storage Access Method

Nodes41
Edges40
Triples17
Avg. degree1.95
Density0.04878
Components1

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Virtual Storage Access Method

Top relations

related to overview · 14
Virtual Storage Access Method → Advanced Applications, An IBM Redbook, CAs, CIs, Control Area, Control Areas, Control Interval, Control Intervals, DASD, IBM, Options, They, VSAM, VSAM PRIMER

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Important terminology

vsam data control access records ksds record interval file ibm set use intervals organization method rrds lds relative sets used

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
tape drives that can only be read sequentially.VSAM records can be of fixed or variable lengthinstance ofas opposed to devices0.80text
in Customer Information Control Systeminstance ofvia dynamic allocation or in online regions0.80text
IBM Db2 or the Operating systeminstance ofwhich allows it to be used by systems0.80text
Virtual Storage Access Methodrelated to overviewAn IBM Redbook0.60section
Virtual Storage Access Methodrelated to overviewVSAM PRIMER0.60section
Virtual Storage Access Methodrelated to overviewVSAM0.60section
Virtual Storage Access Methodrelated to overviewOptions0.60section
Virtual Storage Access Methodrelated to overviewAdvanced Applications0.60section
Virtual Storage Access Methodrelated to overviewIBM0.60section
Virtual Storage Access Methodrelated to overviewDASD0.60section
Virtual Storage Access Methodrelated to overviewThey0.60section
Virtual Storage Access Methodrelated to overviewCIs0.60section

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