Data set (IBM mainframe): Difference between revisions

Revision as of 19:15, 19 December 2006

Revision as of 06:06, 29 December 2006

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== Partitioned Datasets ==

For example, a '''PDS''' or '''Partitioned Data Set''' is a dataset containiningcontaining multiple ''members'', each of which holds a separate sub-data set, similar to a [[directory (file systems)|directory]] in other types of [[file system]]. This type of dataset is used to hold executable programs, or '''Load Modules'''. PDS's are also used to store source program libraries, especially Assembler macro definitions.

A PDS consists of a directory and a group of small, related sequential files stored together in a single dataset. Each sequential file is known as a member of the PDS and is accessed directly using the directory structure. Once a member is located, the data stored in that member is handled in the same manner as a PS (sequential) file.