Sysplex


Also found in: Acronyms.

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 ?
The zSeries 800 cannot be acquired as a standalone machine in this deal, only as part of a Parallel Sysplex cluster.
In fact the 'shared-nothing' architecture implemented in IBM's mid-range version of DB2 contrasts sharply with the 'shared-disk' approach that powers the Sysplex cluster design.
When FILIADATA discussed the need to connect IBM mainframes in a Parallel Sysplex over more than 10 kilometers, there was only one clear option.
Much lighter and less expensive than previous WDM units, the CN 4200 incorporates Distributed Parallel Sysplex, a mainframe server clustering technology.
MAINVIEW solutions deliver foundation monitoring and automation across the entire mainframe environment, including both traditional and Parallel Sysplex environments, as well as dynamic optimization, application quality management, storage monitoring and capacity planning.
FILIADATA, the IT subsidiary of dm Drugstore Corporation, operates several business continuity and high-availability solutions, including a high-end IBM Parallel Sysplex environment.
Support for Geographically Dispersed Parallel Sysplex(TM) (GDPS(TM)): Geographically Dispersed Parallel Sysplex (GDPS) is IBM's proprietary clustering and failover solution.
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.
The cash cow of mainframe software is now growing at a slow single digit pace - when it introduced parallel sysplex clustering to S/390s it actually decline - despite a 35% or 40% growth in the mainframe MIPS market.
Both the Royal Bank of Scotland and Sweden's Vardepapperscentralen (VPC) bank have based their multi-site disaster recovery solutions on the use of IBM's Geographically Dispersed Parallel Sysplex (GDPS) solution and the 7700E.
S/390 systems are already very good at sharing data among themselves through the IBM's Parallel Sysplex Coupling Facility.
Although functionally identical to G5, the G6 offers improved Parallel Sysplex clustering performance, Ficon fibre channel connectivity and Gigabit Ethernet due in June.