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From "bit1129@163.com" <bit1...@163.com>
Subject Question about mapp Task and reducer Task
Date Sun, 15 Feb 2015 10:11:13 GMT
Hi, Hadoopers,

I am pretty newbie to Hadoop, I got a question:  when a job runs, Will each mapper or reducer
task take up a JVM process or only a thread?
I hear that the answer is the Process. That is, say, one job contains 5 mappers and 2 reducers
, then there will be 7 JVM processes?
Thanks.



bit1129@163.com
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