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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abbreviated ABEND Access Method Services ACCTDATA allocation alternate index base cluster buffer bytes CATALOG(UCATLG01 Chapter cname COBOL COMMAND PARAMETERS NOTES COMMflND contains control area control blocks control interval cylinder DASD data component data records data space DD DSN default DEFINE deleted DESTAGEWAIT disk DLBL dname DOS/VSE end-of-file entry ESDS example EXLST EXPORTRA freespace function hexadecimal I/O operation IDCAMS INOI INOI VOL ISAM KSDS length LISTCAT macro master catalog MASTERPW non-VSAM number of records OATA VOL OISTOI INOI operating system option parameter allows parameter specifies password PAYROLL-FILE PAYROLL-STATUS-CODE PflRflM€T€RS PL/I pointers processing RACF relative record REPRO REQ'D retrieval routine RRDS sequence set sequential SHOWCB specifies the name storage suballocated subparameter SYSIN DD TESTCB track updated user catalog volume VSAM catalog VSAM data sets VSAM object VSAM space VSAMRPL VSAN VSflM VTOC VVDS WRITECHECK