Data set (IBM mainframe): Difference between revisions

Revision as of 22:27, 27 November 2007

Revision as of 04:46, 19 January 2008

Line 5:

== Dataset organization ==

{{Template:Mainframe I/O access methods}}

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.