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From Arun Mahadevan <>
Subject Re: simple question about grouping
Date Mon, 23 Jan 2017 11:14:07 GMT

Grouping makes sense only when you have more than one task for a bolt. If your bolt has more
than one task, then the grouping will decide how the tuples from the spout are distributed
to the individual tasks of the bolt. (shuffe = random, fields = keyed on some field and so








From: sam mohel <>
Reply-To: "" <>
Date: Monday, January 23, 2017 at 3:09 PM
To: "" <>, "" <>
Subject: simple question about grouping


i have text file contains data . size of this file is 3.5 MB . My topology consists of one
spout and one bolt so is that possible to make all processing in one bolt and in this case
what is the role of grouping here ? 

Thanks in advance 

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