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GDPS and HyperSwap take resiliency to another level
The challenge of ensuring application availability becomes even greater in multi-site environments. Enter IBM's Geographically Dispersed Parallel Sysplex (GDPS) (US) technology. With GDPS, you can have total confidence that your key business applications will be up and running when your employees, partners and customers need them.
Based on geographical separation and advanced automation techniques, GDPS allows you to manage remote copy configuration and storage subsystems, automate Parallel Sysplex operation tasks and perform failure recovery from a single point of control. GDPS raises the "near-continuous availability" level of a single-site Parallel Sysplex configuration to the "continuous availability" level, providing a strong defense against external threats to applications and data.
While offering the resource sharing, workload balancing and continuous availability benefits of a Parallel Sysplex environment, GDPS also significantly enhances your ability to recover from disasters and other failures and to manage planned exception conditions. GDPS supports the Linux environment and all popular zSeries transaction managers (i.e., CICS (US), IMS (US) and WebSphere) and database managers (i.e., DB2 (US), IMS and VSAM) and is enabled by several key IBM technologies and architectures.
HyperSwap, a new software technology that can substitute peer-to-peer remote copy (PPRC) secondary devices for PPRC primary devices, is managed exclusively through GDPS. As its name suggests, HyperSwap is designed to swap a large number of devices and to do it fast so there is minimal impact to application availability. (With HyperSwap, such disruptions typically are measured in seconds rather than hours). The HyperSwap function may be performed even if the primary disk subsystem is not operational, so you can survive a primary disk subsystem—or even a complete site—failure without recycling your systems. In business terms, that means continuous access to data if such a failure were to occur.
Ensuring the integrity of data in heterogeneous environments
IBM has extended GPDS/PPRC technology to be able to manage heterogeneous environments with z/OS and Open Systems data using the IBM TotalStorage Enterprise Storage Server. This has tremendous significance for enterprises seeking to reduce infrastructure complexity with combined zSeries and BladeCenter platforms. If your installations share disk subsystems between the z/OS and Open System platforms, GDPS/PPRC can manage the PPRC and FlashCopy for Open Systems storage. GDPS/PPRC is also designed to provide data consistency across z/OS and Open Systems data.
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