Storm‘s reliability API: how Storm guarantees that every message coming off a spout will be fully processed.
(storm的可靠性API： storm如何保证spout发出的每一个tuple都被完整处理。)
Guaranteeing message processing
Guaranteeing message processing —— 可靠的消息处理
原文：http://www.cnblogs.com/xymqx/p/4366938.html