Learn how a coupling facility enables high-speed data sharing between mainframes in an IBM Parallel Sysplex environment. Understand this key Parallel Sysplex component.
Table of Contents
Question
Parallel Sysplex provides high speed data sharing using
A. Coupling facility
B. VM facility
C. GRS
D. None
Answer
A. Coupling facility
Explanation
A Parallel Sysplex is a cluster of IBM mainframes that enables high-speed data sharing and workload balancing. The key technology that makes this possible is the coupling facility.
The coupling facility is a specialized logical partition (LPAR) that runs in a PR/SM environment on a mainframe. It contains processors and memory that are shared by all the systems in the Parallel Sysplex.
The coupling facility enables high-speed data sharing between the mainframes by allowing them to exchange data at memory speed rather than over I/O connections. Data sharing structures in the coupling facility, like lock structures and cache structures, mediate access to shared data.
So in summary, the coupling facility (choice A) is the component that provides the high-speed data sharing capabilities that are central to a Parallel Sysplex. The other choices – VM facility, GRS (Global Resource Serialization), or none – do not directly enable high-speed data sharing between mainframe systems.
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