Coherence controls for store-multiple shared data coordinated by cache directory entries in a shared electronic storage

摘要

A high-speed cache is shared by a plurality of independently- operating data systems in a multi-system data sharing complex. Each data system has access both to the high-speed cache and to lower-speed, upper- level storage for obtaining and storing data. Management logic in the shared high-speed cache is provided to meet the serialization and data coherency requirements of the data systems when sharing the high speed cache as a store-multiple cache in a multi-system environment.