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Editorial Team
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Asked: 2026-06-17T23:51:22+00:00

From what I have read, YARN (MRv2) allows a way to plug in a

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From what I have read, YARN (MRv2) allows a way to plug in a scheduler, replacing the default FIFO scheduler. My question is, can we do the same in MRv1? Is there a way to replace the FIFO scheduler in the older version of Hadoop, or is this something that is provided only with YARN?

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  1. Editorial Team

    I’ve been using the fair scheduler for some time now in the 0.20.x version of Hadoop and never had any issues.

    You can set the following property:

    <property> 
  <name>mapred.jobtracker.taskScheduler</name> 
  <value>org.apache.hadoop.mapred.FairScheduler</value> 
</property>

    And you can then go to http://<jobtracker URL>/scheduler

    More details on how to setup for example fair scheduler in MR1 here.

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