December 2011
Intermediate to advanced
410 pages
9h 59m
English
book
CICS Transaction Server from Start to Finish
by Chris Rayns, Sarah Bertram, George Bogner, Chris Carlin, Andre Clark, Amy Ferrell, Gordon Keehn, Peter Klein, Ronald Lee, Erhard Woerner
Content preview from CICS Transaction Server from Start to Finish
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108 CICS Transaction Server from Start to Finish
3.2.3 Files that CICS supports
CICS supports access to the following types of data set:
Key-sequenced data set (KSDS)
Entry-sequenced data set (ESDS)
Relative record data set (RRDS) (both fixed and variable record lengths)
VSAM data sets are held on direct access storage devices (DASD) auxiliary
storage. VSAM divides its data set storage into control areas (CA), which are
further divided into control intervals (CI). Control intervals are the unit of data
transmission between virtual and auxiliary storage. Each one is of fixed size and,
in general, contains a number of records. A KSDS or ESDS can have records
that extend over more than one control interval, which are called spanned
records. ...
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