storm中acker任务的名字由来猜测?

How does Storm implement reliability in an efficient way?

A Storm topology has a set of special "acker" tasks that track the DAG of tuples for every spout tuple.

acker 英文中文翻译为 :涡流,海啸,水的波纹

但这里个人认为取自track  中ack  ,意为跟踪的意思.  

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