WebSphere eXtreme Scale is an elastic, scalable, in-memory data grid. The data grid dynamically caches, partitions, replicates, and manages application data and business logic across multiple servers. WebSphere eXtreme Scale performs massive volumes of transaction processing with high efficiency and linear scalability. With WebSphere eXtreme Scale, you can also get qualities of service such as transactional integrity, high availability, and predictable response times.
WebSphere eXtreme Scale can be used in different ways. You can use the product as a very powerful cache, as an in-memory database processing space to manage application state, or to build Extreme Transaction Processing (XTP) applications. These XTP capabilities include an application infrastructure to support your most demanding business-critical applications.