capacity-scheduler.xml.template

<?xml version="1.0"?>
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<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- This is one of the configuration files for capacity-scheduler
     (org.apache.hadoop.mapred.CapacityTaskScheduler), a TaskScheduler
     for Map/Reduce system. The other configuration file is
     conf/mapred-queues.xml which it shares with the framework for
     configuring queues in the system. -->

<!-- This file can be used to configure (1) job-initialization-poller
     related properties and (2) the default values for various properties
     for all the queues.-->

<configuration>   
  <!-- The default configuration settings for the capacity task scheduler --> 
  <!-- The default values would be applied to all the queues which don't have -->    
  <!-- the appropriate property for the particular queue configured in the -->       
  <!-- queue-configuration file conf/mapred-queues.xml -->                           

  <property>
    <name>mapred.capacity-scheduler.default-supports-priority</name>
    <value>false</value>
    <description>If true, priorities of jobs will be taken into 
      account in scheduling decisions by default in a job queue.
    </description>
  </property>
  
  <property>
    <name>mapred.capacity-scheduler.default-minimum-user-limit-percent</name>
    <value>100</value>
    <description>The percentage of the resources limited to a particular user
      for the job queue at any given point of time by default.
    </description>
  </property>

  <property>
    <name>mapred.capacity-scheduler.default-maximum-initialized-jobs-per-user</name>
    <value>2</value>
    <description>The maximum number of jobs to be pre-initialized for a user
    of the job queue.
    </description>
  </property>


  <!-- Capacity scheduler Job Initialization configuration parameters -->
  <property>
    <name>mapred.capacity-scheduler.init-poll-interval</name>
    <value>5000</value>
    <description>The amount of time in miliseconds which is used to poll 
    the job queues for jobs to initialize.
    </description>
  </property>
  <property>
    <name>mapred.capacity-scheduler.init-worker-threads</name>
    <value>5</value>
    <description>Number of worker threads which would be used by
    Initialization poller to initialize jobs in a set of queue.
    If number mentioned in property is equal to number of job queues
    then a single thread would initialize jobs in a queue. If lesser
    then a thread would get a set of queues assigned. If the number
    is greater then number of threads would be equal to number of 
    job queues.
    </description>
  </property>

</configuration>