Hourly and Daily rolling should use a single reducer
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Key: CHUKWA-276
URL: https://issues.apache.org/jira/browse/CHUKWA-276
Project: Hadoop Chukwa
Issue Type: Improvement
Reporter: Jerome Boulon
Hourly and Daily rolling should not use more than one reducer and they are
currently relying on the default parameter to be correct.
<property>
<name>mapred.reduce.tasks</name>
<value>1</value>
<description>The default number of reduce tasks per job. Typically set
to a prime close to the number of available hosts. Ignored when
mapred.job.tracker is "local".
</description>
</property>
This should be forced within the Rolling class in order to avoid any issue.
And ideally, the code should be changed to allow more than one reducer.
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