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DB2® Universal Database for OS/390® Version 7.1 Certification Guide by Susan Lawson, Richard Yevich

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Data Sharing Components

There are new hardware components to become familiar with in a data sharing environment. Most are simply components in the parallel sysplex, but they are vital to the operation and success of data sharing. DB2 DBA must learn what is in these components, how they are configured, and how they are used. Many performance and availability issues lie with these components.

Coupling Facility

The coupling facility is one of the most important components of a data sharing environment. It is a specialized piece of hardware with dedicated high-speed links that are connected to each DB2 in the data sharing group. It is the center for communication and sharing of data between the subsystems.

It is important to have at least two coupling ...

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