Sysplex

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Sysplex

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

Sysplex

(SYStem comPLEX) The multiprocessing capability in IBM mainframes. Introduced with MVS/ESA 4.3 in 1991, Sysplex links multiple system images within multiple machines and treats them all as a single image. Sysplex added the external Sysplex Timer to synchronize internal clocks, because 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.
References in periodicals archive ?
Oracle allows us to put data on any platform that meets our needs and enables us to inter-operate with our traditional MVS systems to take full advantage of the IBM Sysplex configuration with the assurance that Oracle's DBMS is fully certified on this high-performance platform.
Benchmark results also indicated that MortgageServ is scalable beyond 10 million loans during a nightly window when an IBM Sysplex environment is used.
First of Omaha(R) will operate its system on an IBM Sysplex zSeries platform.
Other specific components and features involved in the tests included the IBM Sysplex Timer(a) (ETR/CLO), Inter System Coupling (ISC1 and ISC3), Peer-to-Peer Remote Copy (PPRC) and Extended Remote Copy (XRC) software.
Adabas supports various parallel processing mechanisms, notably SMP (Symmetrical Multi-Processing) and the IBM Sysplex architecture