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IBM CICS and the Coupling Facility: Beyond the Basics by Kellie Mathis, Rich Jackson, Randy Frerking, Arndt Eade

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Named counters
CICS provides a Parallel Sysplex wide facility for the generation of unique sequence numbers, which can be shared by tasks that are running anywhere within a sysplex. Each number sequence, referred to as a counter, is accessed by a common name, called a named counter. Multiple counters can be defined and logically grouped into pools with each pool of counters mapping to a coupling facility (CF) list structure. Pools provide a logical means of grouping and separating counters. This is useful for individual CICS applications or groups ...

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