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Sysplex

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Sysplex

(SYStem comPLEX) The multiprocessing capability in IBM MVS/ESA and OS/390 mainframes. Introduced with MVS/ESA 4.3 in 1991, it enables the linking of multiple system images within multiple machines and treating them all as a single image. Sysplex added the external Sysplex Timer to synchronize internal clocks. If a failure occurs in a multiprocessor complex, precise transaction time stamps are required for accurate rollback and recovery. It also added XCF (Cross-system Communications Facility), which is software that manages the interconnections between machines.

The addition of one or more Coupling Facilities creates a Parallel Sysplex system that provides high-level clustering that includes data sharing with guaranteed integrity and extensive resource sharing between the systems. See Coupling Facility and Parallel Sysplex.

(operating system)Sysplex - An IBM term for communicating MVS systems. See also "Parallel Sysplex".


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The IBM Geographically Dispersed Parallel Sysplex (GDPS) is an excellent example of such an integrated disaster recovery solution and it can significantly improve availability by reducing the impact of both planned and unplanned outages.
Mirror, Mirror In The Data Center by Wong, Michael / Computer Technology Review
Top 7 answers appear below, beginning with most popular response) -- DB2 Universal Database -- CICS -- MVS -- z/OS -- IBM PC -- WebSphere -- Parallel Sysplex 3.
SHARE Announces Attendee Poll Results at 50th Anniversary Conference, ... by Business Wire
S/390 systems are already very good at sharing data among themselves through the IBM's Parallel Sysplex Coupling Facility.
Crossing The ESCON/SAN Border? by Farley, Marc / Computer Technology Review
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