apache-zookeeper (Install)

It installs Apache ZooKeeper 3.4.9 on Windows, providing the coordination service used to manage distributed applications. ZooKeeper handles naming, configuration management, synchronization, and group services through a simple interface designed for dependable coordination. The package itself is limited to supplying ZooKeeper for installation rather than adding a separate collection of tools or services.

ZooKeeper uses an in-memory messaging model that can deliver sub-millisecond latency and handle tens of thousands of requests per second. Its file-system-like hierarchical namespace organizes coordination data, while monotonically increasing zxids give clients a total ordering for updates. Server ensembles replicate the service so it can survive node failures automatically without data loss.

Distributed-system developers use ephemeral znodes and watches to elect a master, implement mutexes and read/write locks, register live service instances, distribute configuration changes without polling, and track group membership. The same primitives coordinate phased computations so workers begin and finish each stage together, which explains its use by systems including Kafka, Hadoop, and HBase. Users can set up a single server, work with ZooKeeper through its command-line interface, and write clients that implement patterns such as barriers and queues.

The package is published by Manimaran Chandrasekaran under an open-source license and is categorized as System Tools for Windows. ZooKeeper is a top-level Apache project with an active community, documentation, Slack discussions, roadmap participation, and security information covering known CVEs.