What is ZooKeeper
Because coordinating distributed systems is a Zoo.
因为协调分布式系统就想动物园。。。
ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. All of these kinds of services are used in some form or another by distributed applications. Each time they are implemented there is a lot of work that goes into fixing the bugs and race conditions that are inevitable. Because of the difficulty of implementing these kinds of services, applications initially usually skimp on them ,which make them brittle in the presence of change and difficult to manage. Even when done correctly, different implementations of these services lead to management complexity when the applications are deployed.
Zookeeper是一个分布式协调服务，可用于服务发现，分布式锁，分布式选举，配置管理等。
