IBM Parallel Sysplex - Geographically Dispersed Parallel Sysplex

"GDPS" redirects here. For other uses, see GDPS (disambiguation).

Geographically Dispersed Parallel Sysplex (GDPS) is an extension of Parallel Sysplex of mainframes located, potentially, in different cities. GDPS includes configurations for single site or multiple site configurations:

  • GDPS/HyperSwap Manager: It is based on synchronous Peer to Peer Remote Copy (PPRC) technology for use within a single data center. Data is copied from the primary storage device to a secondary storage device. In the event of a failure on the primary storage device, the system automatically makes the secondary storage device the primary, usually without disrupting running applications.
  • GDPS/PPRC: It is based on synchronous data mirroring technology (PPRC) that can be used on mainframes 200 kilometres (120 mi) apart. In a two-system model, both sites can be administered as if they were one system. In the event of a failure of a system or storage device, recovery can occur with limited or no data loss automatically.
  • GDPS/XRC: It is based on asynchronous Extended Remote Copy (XRC) technology with no restrictions on distance. XRC copies data on storage devices between two sites such that only a few seconds of data may be lost in the event of a failure. If a failure does occur, a user must initiate the recovery process. Once initiated, the process is automatic in recovering from secondary storage devices and reconfiguring systems.
  • GDPS/GM: It is based on asynchronous IBM Global Mirror technology with no restrictions on distance. It is designed to recovery from a total failure at one site. It will activate secondary storage devices and backup systems.
  • GDPS/MGM & GDPS/MzGM: These are configurations for systems with more than two systems/sites for purposes of disaster recovery. GDPS/MGM and GDPS/MzGM are based on GDPS/PPRC together with GDPS/GM, and GDPS/PPRC together with GDPS/XRC, respectively.
  • GDPS/Active-Active: It is a disaster recovery / continuous availability solution, based on two or more sites, separated by unlimited distances, running the same applications and having the same data to provide cross-site workload balancing.

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