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IBM CICS and the Coupling Facility: Beyond the Basics by Kellie Mathis, Rich Jackson, Randy Frerking, Arndt Eade

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Global resource serialization
In a multitasking, multiprocessing environment, resource serialization is a technique that is used to coordinate access to resources that are used by more than one program. When multiple users share data, a way to control access to that data is needed. Users who update data, for example, need exclusive access to that data; if several users tried to update the same data at the same time, data integrity exposure (the possibility of incorrect or damaged data) would result. In contrast, users who only read data can safely ...

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