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From Sisu Xi <xis...@gmail.com>
Subject default 8 mappers per host ?
Date Tue, 15 Jul 2014 03:02:01 GMT
Hi, all:

I configured a hadoop cluster with 9 hosts, each with 2 VCPU and 4G Ram.

I noticed when I run the example pi program, only when I configure it with
at least 8*9=72 mappers will all hosts be busy.
Which means there is a default 8 mappers per host?

How is this value decided? And where can I change it?

Thanks very much!



*Sisu Xi, PhD Candidate*

Department of Computer Science and Engineering
Campus Box 1045
Washington University in St. Louis
One Brookings Drive
St. Louis, MO 63130

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