Discover how a coupling facility enables high-speed data sharing in an IBM Parallel Sysplex mainframe environment. Learn the key components and benefits of this advanced architecture.
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 provides near-continuous availability. The key component that allows for this high-speed data sharing is the coupling facility.
The coupling facility is a specialized logical partition (LPAR) that runs on a mainframe server and provides high-speed caching, locking, and message passing services for the Parallel Sysplex environment. It enables the efficient sharing of data and resources among the multiple z/OS images in the sysplex.
Some key points about the coupling facility:
- It is a shared storage area accessible by all systems in the sysplex
- It contains lock structures for concurrency control and cache structures for rapid data sharing
- It allows multiple systems to access and update shared data with minimal delays
- It provides a fast communications path between systems in the sysplex
- It is a critical component for enabling high availability, scalability, and performance
So in summary, the coupling facility (choice A) is what provides the high-speed data sharing capabilities in a Parallel Sysplex environment. The other choices – VM facility and GRS – do not directly enable high-speed data sharing in a sysplex. The coupling facility’s shared caching and locking allow the multiple systems to efficiently share and access data, enabling the key benefits of the Parallel Sysplex architecture.
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