Getting Into VSAM: An Introduction and Technical Reference
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 purposes 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.
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CHAPTR 1OV6RVI6UU OF DIRCT ACCESS
CHAPTR 2ACCSS METHODS
CHAPTR 3VSAMAN OVRVIW
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ABEND Access Method Services ACCTDATA ACCTDATA,'MlKE allocated alternate index base cluster buffer bytes Catalog Recovery Area CATALOG(UCATLG01 Chapter COBOL COMMAND PARAMETERS NOTES contain control area control interval cylinder DASD DATA AREA data component data records data space DD DSN default defined deleted device disk DLBL dname DOS/VSE end-of-file entry ENVlRONMENT ESDS example EXEC PGM EXLST FlLE format freespace function hexadecimal IDCAMS INOX VOL ISAM KSDS length LISTCAT lts abbreviation macro master catalog NISTORY non-VSAM number of records OATA VOL OISTOI CLUS operating system option parameter allows parameter specifies password PAYROLL-FlLE PAYROLL-STATUS-CODE PL/I pointers processing RACF relative record REPRO REQ'D retrieval rotational delay RRDS sequence set sequential specifies the name split STEPCAT suballocated subparameter SYSlN DD TAOA TESTCB track updated user catalog volser volume VSAM catalog VSAM data sets VSAM object VSAM space VSAN VTOC