Zookeeper: Intro
Explore the fundamentals of ZooKeeper and its role in managing distributed systems within Big Data deployments. Understand its hierarchical data model, high availability through ensemble mode, and how it ensures consistency and atomic updates. Gain insights into starting and configuring ZooKeeper, and how it supports synchronization and coordination in enterprise-scale clusters.
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Zookeeper
Zookeeper is a crucial piece of any Big Data deployment at enterprise scale. ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization and group services. All these services are used by distributed applications. According to the official website, Zookeeper gets its name because coordinating distributed systems is a zoo.
At its core, Zookeeper is simple to understand. Think of it as a hierarchical filesystem or a tree. The basic building block of Zookeeper is a znode. A znode can store data (like a file) or have child znodes (like a directory). The overall design of Zookeeper provides for a highly available system consisting of znodes that make up a hierarchical namespace. The following is a representation of znodes:
Zookeeper can be run as a single server in standalone mode or on a cluster of ...