Dramatically Reduce the Cost of Sequential File Accesses in CICS

Project and Program: Application Architecture Development and Integration, CICS

Tags: Proceedings , SHARE in Anaheim 2012 , 2012

Reduce the cost of multiple accesses to sequential files in CICS, from hundreds or thousands of machine instructions down to just 3 for a READNEXT or less than 40 for a DELETE or a new WRITE - and new records can be inserted anywhere in the file. A REWRITE can even be achieved with no overhead at all as long as some simple coding guidelines are followed. An extremely efficient approach to sequential file-handling online, using 64 bit storage above the bar, while remaining thread-safe for non-update READs and even providing a thread-safe option for updates as well, with just a little more overhead. Stephen P. Reid ; Mainframe Specialist

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