Data set (IBM mainframe): Difference between revisions

Revision as of 10:48, 5 October 2007

Revision as of 09:20, 7 October 2007

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In OS/360, the DCB's DSORG parameter specifies how the dataset is organized. It may be physically sequential ("PS"), indexed sequential ("IS"), partitioned ("PO"), or Direct Access ("DA"). Datasets on tape may only be DSORG=PS. The choice of organization depends on how the data is to be accessed, and in particular, how it is to be updated.

Programmers utilize various [[access methodsmethod]]s (such as [[QSAM]] or [[VSAM]]) in programs reading and writing data sets, their choice depending on given data set organization.

== Record Format (RECFM) ==