Chapter 1. Introduction to the Parallel Sysplex 9
1.6 Sysplex services for data sharing (XES)
Cross-system extended services (XES) is a set of sysplex services for data sharing which
allows subsystems, system products, and authorized programs to use Coupling Facility
structures for high performance, high availability data sharing. In this context, data sharing
means the sharing of
any type of data by programs running on any system in the sysplex. It
does not mean data sharing only in the IMS (or DB2 or VSAM) sense of the term. IMS data
sharing utilizes these sysplex services for data sharing to manage its own block level data
sharing of IMS databases. Other examples of shared data used within the IMSplex include
shared messages (IMS shared ...