Go to hazelcast.org/documentation

Introduction

Hazelcast is a clustering and highly scalable data distribution platform for Java. Hazelcast helps architects and developers to easily design and develop faster, highly scalable and reliable applications for their businesses.

  • Distributed implementations of java.util.{Queue, Set, List, Map}

  • Distributed implementation of java.util.concurrent.ExecutorService

  • Distributed implementation of java.util.concurrency.locks.Lock

  • Distributed Topic for publish/subscribe messaging

  • Transaction support and J2EE container integration via JCA

  • Distributed listeners and events

  • Support for cluster info and membership events

  • Dynamic HTTP session clustering

  • Dynamic clustering

  • Dynamic scaling to hundreds of servers

  • Dynamic partitioning with backups

  • Dynamic fail-over

  • Super simple to use; include a single jar

  • Super fast; thousands of operations per sec.

  • Super small; only 3 MB

  • Super efficient; very nice to CPU and RAM

To install Hazelcast:

  • Download hazelcast-version.zip from www.hazelcast.org.

  • Unzip hazelcast-version.zip file.

  • Add hazelcast-version.jar file into your classpath.

Hazelcast is pure Java. JVMs that are running Hazelcast will dynamically cluster. Although by default Hazelcast will use multicast for discovery, it can also be configured to only use TCP/IP for environments where multicast is not available or preferred (Click here for more info). Communication among cluster members is always TCP/IP with Java NIO beauty. Default configuration comes with 1 backup so if one node fails, no data will be lost. It is as simple as using java.util.{Queue, Set, List, Map}. Just add the hazelcast.jar into your classpath and start coding.