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Unisys Corporation Announces Maximum Data Integrity for Multi-Host Environments
[March 31, 2005]

Unisys Corporation Announces Maximum Data Integrity for Multi-Host Environments

BLUE BELL, Pa. --(Business Wire)-- March 31, 2005 -- Unisys Corporation today announced the release of the eXtended Processor Complex - Locking (XPC-L), a database record locking innovation for multi-host clustered mainframe environments. XPC-L protects the integrity of data being updated by various system managers across a multi-host ClearPath environment. This new product replaces the existing eXtended Processing Complex (XPC) for the Unisys ClearPath Dorado line of servers.

High performance data caching previously handled by XPC is now provided by a multi-path command queuing architecture and modern, high-performance storage subsystems. This new multi-host clustering provides maximum transaction processing capacity and high availability with up to four Unisys Dorado mainframe OS2200 host systems accessing a single OS2200 database. XPC-L allows up to 128 processors to be configured to provide maximum transaction processing capacity and the highest levels of availability.

XPC-L has more than double the lock processing capacity of its predecessor. High performance fibre interfaces provide low-latency connections between OS2200 hosts and XPC-L servers, significantly improving locking times. In addition to increased capacity, fully redundant XPC-L lock engines can be configured to provide improved availability that allows these servers to provide continuous operation in the event of the loss of a lock engine. Software updates, if required, can be installed on each of the XPC-L systems independently, without operation interruption - a common problem in high performance mainframe environments.

XPC-L is completely compatible with the current XPC product, requiring no change to existing customer application software. XPC-L is currently available for Unisys ClearPath Dorado Platforms, and can be adapted to comply with various other computing environments.

About Unisys

Unisys is a worldwide information technology services and solutions company. Our people combine expertise in consulting, systems integration, outsourcing, infrastructure and server technology with precision thinking and relentless execution to help clients, in more than 100 countries, quickly and efficiently achieve competitive advantage. For more information, visit

RELEASE NO.: 0331/8528

Unisys is a registered trademark of Unisys Corporation. All other brands and products referenced herein are acknowledged to be trademarks or registered trademarks of their respective holders.

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