ZooKeeper

ZooKeeper is a high-performance coordination service for distributed applications. It exposes common services - such as naming, configuration management, synchronization, and group services - in a simple interface so you don't have to write them from scratch. You can use it off-the-shelf to implement consensus, group management, leader election, and presence protocols. And you can build on it for your own, specific needs.

Code	zookeeper
URL	https://zookeeper.apache.org/doc/r3.5.8/
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Last Updated	May 20, 2021