How to: In-memory data grids
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 [Ehcache](https://www.ehcache.org) is an open source, standards-based cache that boosts performance, offloads your database, and simplifies scalability. It's the most widely-used Java-based cache because it's robust, proven, full-featured, and integrates with other popular libraries and frameworks.

 [Hazelcast](https://hazelcast.com) is an open source in-memory data grid based on Java.