Physical Sequential
Physical Sequential
(file format)(PS, QSAM, Queued Sequential Access Method) The
simplest data set on an IBM mainframe. Sequential files
can only be read or written from the beginning: they do not
support random access.
References in periodicals archive
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Since the open systems data is presented to the mainframe as a physical sequential dataset within a single 3390 volume, an organization can use its existing volume-level backup and restore procedures and utilities.
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