Zookeeper is an open source sub-project for Hadoop (the open source implementation of Google Chubby), a reliable, coordinated system for large distributed systems that includes configuration maintenance, naming services, distributed synchronization, group services, and more. Zookeeper's fast Fail and leader election features greatly enhance the stability and robustness of the distributed cluster, and solve the major hidden trouble of single point of failure in Master/slave mode, which is more and more distributed products such as HBase, Storm (Stream computing), S4 (flow calculation) and other strong dependent zookeeper reasons.
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Download zookeeper from beginner to proficient (development details, case combat, web interface Monitoring)