Mastering the Unexpected: Unisys Extended Transaction Capacity (XTC) Now Available on ClearPath Dorado Next-Generation Server Architecture Platforms
Since we first announced ClearPath Next-Generation Server Architecture, which features Unisys ClearPath Servers using Intel® processor technology, we have followed a roadmap of incremental deliveries designed to offer excellent business value via standardization of IT infrastructure on Intel® processors — combined with proven ClearPath mission-critical mainframe attributes.
We’re proud to announce that we have taken another MAJOR step in the Next-Generation roadmap with the introduction of the full functionality of Unisys Extended Transaction Capacity (XTC), which uses eXtended Processing Complex Locking (XPC-L) to enable host clustering for the ClearPath Dorado 4000 Family of Servers. By clustering multiple Dorado Servers, you gain two important features: continuous operations and access to greater overall processing capacity by adding a scale-out capability to the scale-up of a single host. The XTC functionality is included in the Dorado 4000 Plateau 2.0, which also includes a number of other reliability and resiliency enhancements.
XTC is a database record locking innovation for multi-host, clustered Dorado Server environments. The XPC-L server protects the integrity of data being updated by various system managers across a multi-host ClearPath environment. For example, with XPC-L the same database record can be accessed and updated by different applications on up to four different ClearPath Dorado servers. And should host operations be interrupted, transaction processing will continue because the clustered servers are accessing a shared common database.
Now available on both the Dorado 4080 and 4090 platforms, this new functionality, which enables real-time data delivery and secure, continuous business operations in a Unisys ClearPath Dorado multi-host environment, is clear evidence of Unisys continued commitment to ClearPath and to delivering the highest levels of resilience and availability for all members of the Dorado Family.
The introduction of XTC on the Dorado 4000 Family of Servers brings one of the most complex areas of Dorado technology — developed over many years to support the needs of the world’s most demanding computing environments — to Next-Generation Dorado Servers. No small task — but one that we knew was essential for our Dorado customers.
ClearPath Dorado 4000 Servers offer a “best of both worlds” computing platform that combines Intel® processors, the innovative and robust OS 2200 operating environment, and proven ClearPath mainframe attributes of performance, security, reliability, scalability, manageability, and tight integration with open middleware. And now with XTC ultra high availability capabilities, the Dorado 4080 and 4090 Servers are ready to support highly complex, database-centric workloads.
For more information about ClearPath Dorado 4000 Servers, Unisys Extended Transaction Capacity, and Unisys Extended Transaction Processing Architecture, visit the eCommunity.

