ScaleOut StateServer is an in-memory data grid (IMDG), also called a distributed cache, which runs as a distributed software service on a set of dedicated virtual servers to help scale application performance. It stores an application's data objects in memory, makes them instantly accessible to networked web or application servers, and scales to handle large workloads. Stored objects can be uniformly accessed by clients using a fully consistent storage model, and the grid enables simultaneous access by different clients to data objects stored on different grid servers. Once provisioned, ScaleOut StateServer automatically balances the amount of storage used by each server in the grid to scale throughput and maintain fast response times. As new servers running ScaleOut StateServer are provisioned, they automatically rebalance the workload to expand storage capacity and throughput. High availability is built into every feature of ScaleOut StateServer to support the needs of mission-critical applications. A comprehensive set of Java, C/C++, .NET, and REST APIs enable applications to directly access the IMDG as a key/value store using create/read/update/delete semantics. APIs also can perform a wide variety of operations, such as querying objects by their properties and handling asynchronous events. AWS instances include Standard Support for ScaleOut StateServer. Premium support packages are available directly from ScaleOut Software.