Merge pull request #1553 from lwl888/rocketmq-dev-fs

[ISSUE #1526]modify docs-cn description error
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Heng Du
2019-10-29 20:50:34 +08:00
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RocketMQ的消费者可以根据Tag进行消息过滤,也支持自定义属性过滤。消息过滤目前是在Broker端实现的,优点是减少了对于Consumer无用消息的网络传输,缺点是增加了Broker的负担、而且实现相对复杂。
## 4 消息可靠性
RocketMQ支持消息的高可靠,影响消息可靠性的几种情况:
1) Broker正常关闭
1) Broker非正常关闭
2) Broker异常Crash
3) OS Crash
4) 机器掉电,但是能立即恢复供电情况