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JVM reuse in hadoop2

JVM reuse in hadoop2

Contributor

Since JVM reuse is disabled in Hadoop2, how to avoid over head of launching large number of JVMS for small jobs.

2 REPLIES 2

Re: JVM reuse in hadoop2

Master Guru
Use the Uber mode, which runs threaded MR within the AM directly. To configure, search for all "uber" named properties under http://archive.cloudera.com/cdh5/cdh/5/hadoop/hadoop-mapreduce-client/hadoop-mapreduce-client-core/m...

Re: JVM reuse in hadoop2

Contributor

Is it ok to run large number of mappers in AM?