Since JBoss Cache is a replicated cache, state is always kept in sync with other servers in the cluster.  This makes any state stored in JBoss Cache resilient to server crashes or restarts, achieving high availability.

JBoss Cache still is, as it’s name suggests, a cache.  It is a product designed to cache frequently accessed Java objects in order to dramatically improve the performance of applications.  This makes it easy to remove data access bottlenecks - such as connecting to a database. 

And unlike non-cluster-aware caches which may go out of sync when there are concurrent updates, each JBoss Cache instance is aware of remote cache updates and can either invalidate or update it’s state.

JBoss Cache is an advanced, 'enterprise-grade' data grid solution, providing features such as transactions, eviction, and cache loading in addition to replication. Please see the JBoss Cache Users' Guide or FAQs for more details.

JBoss Cache is licensed under the liberal and business-friendly LGPL license. It is OSI approved and 100% Open Source.

JBoss Cache comes in 2 editions - a core cache, for caching simple objects, and POJO cache for caching more complex object hierarchies. Please see the JBoss Cache Users' Guide or FAQs for more details.