Coupling Facility
**Coupling Facility**
What is Coupling Facility?
A Coupling Facility (CF) is a specialized logical partition (LPAR) in an IBM mainframe (z/OS) environment that provides high-speed, shared data access and synchronization services to multiple systems (LPARs) within a Parallel Sysplex. It enables applications running on different systems to share data and coordinate activities with very low latency. Common uses include caching data, managing locks, and queuing messages to improve performance, availability, and scalability of applications.
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