4.6 Message Delivery Semantics Now that we understand a little about how producers and consumers work, let's discuss the semantic guarantees Kafka provides between producer and consumer. Clearly there are multiple possible message delivery guarantees…
原文见:http://kafka.apache.org/documentation.html#semantics kafka在生产者和消费者之间的传输是如何保证的,我们可以知道有这么几种可能提供的delivery guarantee: At most once 消息可能会丢,但绝不会重复传输 At least one 消息绝不会丢,但可能会重复传输 Exactly once 每条消息肯定会被传输一次且仅传输一次,很多时候这是用户所想要的. 值得注意的是,当Producer向broker发送消息时…
Kafka Delivery Semantics 在Kafka Consumer中,有3种delivery semantics,分别为:至多一次(at most once).至少一次(at least once).以及准确一次(exactly once),下面我们分别介绍这3种Delivery 语义. 1. At Most Once 在message batch在被consumer接收后,立即commit offsets.此时若是在消息处理逻辑中出现异常,则未被处理的消息会丢失(不会再次被读取)…
Flume 1.7.0 User Guide Introduction(简介) Overview(综述) System Requirements(系统需求) Architecture(架构) Data flow model(数据流模型) Complex flows(复杂流) Reliability(可靠性) Recoverability(可恢复性) Setup(配置) Setting up an agent(设置一个agent) Configuring individual components…
producer接口: /** * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this…
2.1 Producer API We encourage all new development to use the new Java producer. This client is production tested and generally both faster and more fully featured than the previous Scala client. You can use this client by adding a dependency on the c…
