Kafka的消息可靠传递 · 乱世浮生



Kafka的消息可靠传递 · 乱世浮生

Kafka提供的基础保障可以用来构建可靠的系统, 却无法保证完全可靠. 需要在可靠性和吞吐之间做取舍.

  • Kafka在分区上提供了消息的顺序保证.
  • 生产的消息在写入到所有的同步分区上后被认为是已提交 (不需要刷到硬盘). 生产者可以选择在消息提交完成后接收broker的确认, 是写入leader之后, 或者所有的副本
  • 只要有一个副本存在, 提交的消息就不会丢失
  • 消费者只能读取到已提交的消息


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