Coupling Facility
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Coupling Facility
The hardware and software that turns an IBM mainframe Base Sysplex system into a Parallel Sysplex. It is made up of special microcode built into the machine, and the CFCC operating system (Coupling Facility Control Code). It can be implemented as a stand-alone machine, in an LPAR logical partition or in a spare processor that becomes an Internal Coupling Facility (ICF).
The Coupling Facility allows up to 32 coupled systems to communicate using three coupling structures: "list" for simple data, "cache" for data buffering and "lock" for control of access to ensure data integrity. See Parallel Sysplex.Copyright © 1981-2025 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive
Any unactivated processors in a T-Rex book can be activated as a
coupling facility (used for Parallel Sysplex clustering) or as SAPs.
* Protocol Transparency/Low Latency--Most DWDM systems support Fibre Channel, ESCON, ATM, FICON, GbE, SONET/SDH, Sysplex
Coupling Facility timers, and video.
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