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IBM Geographically Dispersed Parallel Sysplex

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Schematic representation of a Geographically Dispersed Parallel Sysplex (GDPS)

Geographically Dispersed Parallel Sysplex (GDPS) is a family of business continuity and disaster recovery solutions based on IBM mainframe technology. It is a service offering supplied by IBM, rather than a software product. GDPS runs as a Netview application, making full use of SA390.[clarification needed] It monitors all the LPARs in the sysplex, both OSs and Coupling Facilities, it also monitors the replication of direct access storage device (DASD) data.

The GDPS family includes solutions for single site or multiple site configurations :

  • Single site configuration
    • GDPS/HyperSwap Manager. It is a business continuity solution based on a synchronous Peer to Peer Remote Copy (PPRC) technology. It implements the HyperSwap technology that allow an application-transparent swap of storage devices.
  • Two site configuration
    • GDPS/PPRC. It is a business continuity and disaster recovery solution based on a synchronous mirroring technology (PPRC). It implements the HyperSwap technology as well as automation facilities for the restart of operating systems in case of DASD or CPU failure.
    • GDPS/XRC. It is a disaster recovery solution based on an asynchronous Extended Remote Copy (XRC) technology. It implements automation facilities for the restart of operating systems in case of DASD or CPU failure.
    • GDPS/GM. It is a disaster recovery solution based on an asynchronous IBM Global Mirror technology. It implements automation facilities for the restart of operating systems in case of DASD or CPU failure.
  • Three site configuration, which combines synchronous and asynchronous mirroring technology. The purpose is to offer business continuity in case of disk or site failure while maintaining disaster recovery capability at long distance.
    • GDPS/MGM, based on GDPS/PPRC combined with GDPS/GM.
    • GDPS/MzGM, based on GDPS/PPRC combined with GDPS/XRC.
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