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The Access Method Services utility program IDCAMS is commonly used to manipulate ("delete and define") VSAM data sets. Custom programs can access VSAM datasets through Data Definition (DD) statements in Job Control Language (JCL), via dynamic allocation or in online regions such as in Customer Information Control System (CICS).
A Generation Data Group [10] (GDG) [11] is a group of non-VSAM data sets [12] that are successive generations of historically-related data [13] stored on an IBM mainframe (running OS or DOS/VSE). [14] A GDG is usually cataloged. [13] An individual member of the GDG collection is called a "Generation Data Set."
IDCAMS ("Access Method Services") generates and modifies Virtual Storage Access Method (VSAM) and Non-VSAM datasets. IDCAMS was introduced along with VSAM in OS/VS; the "Access Method" reference derives from the initial "VSAM replaces all other access methods" mindset of OS/VS. IDCAMS probably has the most functionality of all the utility ...
IEFBR14 was created because while DD statements can create or delete files easily, they cannot do so without a program to be run due to a certain peculiarity of the Job Management system, which always requires that the Initiator actually execute a program, even if that program is effectively a null statement. [2]
The z/OS Generation Data Group (GDG) is a description of how many generations of a file are to be kept and at what age a generation will be deleted. Whenever a new generation is created, the system checks whether one or more obsolete generations are to be deleted.
Melissa Rivers is still mourning losing everything she owned after her Pacific Palisades home was destroyed in the Los Angeles wildfires on Jan. 7.. But her mother Joan Rivers' famous collection ...
Version 5 Release 2 5697-ECV 2015-10-06 2020-04-30 Enterprise COBOL for z/OS Version 6 Release 1 5655-EC6 2016-03-18 2022-09-30 Enterprise COBOL Value Unit Edition for z/OS 1: Version 6 Release 1 5697-V61 2016-03-18 2022-09-30 Enterprise COBOL for z/OS Version 6 Release 2 5655-EC6 2017-09-08 2024-09-30 Enterprise COBOL Value Unit Edition for z/OS 1
Logical Unit 6.2 is an IBM-originated communications protocol specification dating from 1974, and is part of IBM's Systems Network Architecture (SNA). A device-independent SNA protocol, it is used for peer-to-peer communications between two systems, for example, between a computer and a device ( e.g. terminal or printer), or between computers.