hadoop-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
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?

View raw message