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increase the use of the CPU on DataNode

Question asked by dariocasab on Jun 15, 2015
Hello ,
I 'm using Hadoop in cluster mode using simple notebooks .
I'm looking for a way to increase the CPU usage on DataNode .
For now I tried flipping the job Wordcount using input of different sizes :
a single file size smaller than the block ( < 128MB ) ;
a single large file ( 1.6 Gb ) ;
more file size smaller than the block.
more large files .
All my tests give a result more or less standard , that is, the CPU is settled at about 10 % .
How I can increase the CPU usage on DataNode ?
Even using different job from WordCount

Thanks

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