specify different heap size for namenode/jobtracker vs. tasktracker/datanodes
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Key: HADOOP-2764
URL: https://issues.apache.org/jira/browse/HADOOP-2764
Project: Hadoop Core
Issue Type: New Feature
Affects Versions: 0.15.3
Reporter: Joydeep Sen Sarma
Priority: Minor
tasktrackers/datanodes should be run with low memory settings. theres a lot of
competition for memory on slave nodes and these tasks don't need much memory
anyway and best to keep heap setting low.
namenode needs higher memory and there's usually lots to spare on separate box.
hadoop-env.sh can provide different heap settings for central vs. slave daemons.
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