IBM Parallel Sysplex: Difference between revisions

Revision as of 19:54, 18 May 2009

Revision as of 21:45, 14 June 2009

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* GDPS/HyperSwap Manager: It is a 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, they system automatically makes the secondary storage device the primary, usually without disrupting running applications.

* GDPS/PPRC: It is a synchronous data mirroring technology (PPRC) that can be used on mainframes {{convert|200|km|mi}} apart. In a two-system model, both sites can be administered as it itis 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 an 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 an 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.