不多说，直接上干货！
一切来源于官网
http://kafka.apache.org/documentation/
Event Sourcing
事件采集
Event sourcing is a style of application design where state changes are logged as a time-ordered sequence of records. Kafka's support for very large stored log data makes it an excellent backend for an application built in this style.
事件采集是一种应用程序的设计风格，其中状态的变化根据时间的顺序记录下来，kafka支持这种非常大的存储日志数据的场景。