GDPS/PPRC uses a combination of storage subsystem and Parallel Sysplex technology triggers to capture, at the first indication of a potential disaster, a consistent secondary site copy of the data using the PPRC freeze function. The freeze function, initiated by automated procedures, is designed to freeze the image of the secondary data at the very first sign of a disaster, even before any database managers will be aware of I/O errors. This prevents the logical contamination of the secondary copy of data that would occur if any storage subsystem mirroring were to continue after a failure that prevents some, but not all secondary volumes from being updated. GDPS/PPRC includes automation to manage remote copy pairs, automatically invokes CBU, and automation to restart applications on the recovery site.
GDPS/PPRC has the following attributes:
GDPS/PPRC HyperSwap Manager
The GDPS/PPRC HyperSwap Manager is designed to extend the availability attributes of Parallel Sysplex redundancy in a single site to disk subsystems. It provides the ability to transparently switch primary PPRC disk subsystems with the secondary PPRC disk subsystems for a planned or unplanned reconfiguration.
Extended Remote Copy (XRC) is a combined hardware and z/OS software asynchronous remote copy solution. All critical data is mirrored between the primary and secondary sites. Consistency of the data is maintained via the Consistency Group function within the System Data Mover. GDPS/XRC includes automation to manage remote copy pairs and automates the process of recovering the production environment with limited manual intervention, including invocation of CBU, thus providing significant value in reducing the duration of the recovery window.
GDPS/XRC has the following attributes:
GDPS®/Global Mirror can help to provide a two-site automated disaster recovery and backup solution at virtually any distance, for the z/OS® and open systems environments by mirroring critical data between primary and recovery sites.
Data consistency is maintained at the recovery site across all supported platforms using the proven IBM® TotalStorage® Global Mirror copy technology. GDPS helps provide automation technologies, which are designed to manage the mirroring environment, monitor the mirroring configuration and automate management and recovery tasks. This can provide the ability to synchronize IBM , z Systems®/z9® systems and open systems data to the same point in time at the recovery site. GDPS/Global Mirror can provide:
Learn more about the new enhancements in GDPS/Global Mirror in Hardware Announcement 605-035, dated October 18, 2005.
More information on the GDPS/Global Mirror service offering can be found in: //www.ibm.com/services/us/index.wss/offering/its/a1022703
GDPS/MzGM (Metro Mirror + z/OS Global Mirror)
GDPS/PPRC together with GDPS/XRC in a multi-target configuration provides the ability to combine the advantages of metropolitan-distance business continuity and regional or long-distance disaster recovery. This can provide a near-continuous availability solution with no data loss and minimum application impact across two sites located at metropolitan distances, and a disaster recovery solution with recovery at an out-of-region site with minimal data loss. This enables a z/OS three-site high availability and disaster recovery solution for even greater protection from planned and unplanned outages.
Combining the benefits of PPRC and XRC, GDPS MzGM enables:
Since GDPS/XRC supports z Systems data only (z/OS, Linux on z Systems), GDPS Metro/z/OS Global Mirror is a z Systems solution only.
GDPS/MGM (Metro Mirror + Global Mirror)
GDPS/PPRC together with GDPS/Global Mirror in a cascading configuration provides the ability to combine the advantages of metropolitan-distance business continuity and regional or long-distance disaster recovery. This can provide a near-continuous availability solution with no data loss and minimum application impact across two sites located at metropolitan distances, and a disaster recovery solution with recovery at an out-of-region site with minimal data loss. This enables a z/OS three-site high availability and disaster recovery solution for even greater protection from planned and unplanned outages.
Combining the benefits of PPRC and Global Mirror, GDPS MGM enables:
GDPS/MGM has the benefit of being able to manage data across the enterprise, not being limited to z Systems formatted data, and provide data consistency across all the data
GDPS/Active-Active is a fundamental paradigm shift from a failover model to a continuous availability model. GDPS/Active-Active as a software based asynchronous mirroring solution for select z/OS workloads, designed to maintain a consistent copy of data within IMS™ and within DB2® at virtually unlimited distances, recovery time measured in seconds, with minimal impact to application response time. GDPS/Active-Active is disk independent. Current support is for the Active-Standby configuration.
GDPS/Active-Active is capable of: