Apache Kafka是一款开源的消息发布与订阅系统，它被重新设计为分布式提交日志，具备高速处理能力，单一Kafka Broker即可应对每秒数百兆的数据读写，并支持数千客户端。其设计允许集群弹性且透明地扩展，而无需停机。Kafka提供了强大的持久性和容错性，消息被持久化到磁盘并复制到集群中以防止数据丢失。
Apache Kafka is publish-subscribe messaging rethought as a distributed commit log.
Fast
A single Kafka broker can handle hundreds of megabytes of reads and writes per second from thousands of clients.
Scalable
Kafka is designed to allow a single cluster to serve as the central data backbone for a large organization. It can be elastically and transparently expanded without downtime. Data streams are partitioned and spread over a cluster of machines to allow data streams larger than the capability of any single machine and to allow clusters of co-ordinated consumers
Durable
Messages are persisted on disk and replicated within the cluster to prevent data loss. Each broker can handle terabytes of messages without performance impact.
Distributed by Design
Kafka has a modern cluster-centric design that offers strong durability and fault-tolerance guarantees.
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