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purescale (Db2 for LUW) and Sysplex (Db2 for z/OS) are shared disk architecture clustering technologies whereby multiple Db2 members process database requests against a single shared copy of the database.
The inter-member communications are enabled with the assistance of a coupling facility (CF) that allows sharing of core services, such as database locks and buffer pools, among members.
In this article, learnt eh fundamentals and specific information to harness these offerings in an optimal way from a client application standpoint.