hadoop/hadoop-tools/hadoop-distcp/src/main/resources/distcp-default.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
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<!-- Do not modify this file directly. Anything that need to be overwritten,
     need to be done so, through -D switches or customized conf -->

<configuration>

    <property>
        <name>distcp.dynamic.strategy.impl</name>
        <value>org.apache.hadoop.tools.mapred.lib.DynamicInputFormat</value>
        <description>Implementation of dynamic input format</description>
    </property>

    <property>
        <name>distcp.static.strategy.impl</name>
        <value>org.apache.hadoop.tools.mapred.UniformSizeInputFormat</value>
        <description>Implementation of static input format</description>
    </property>

    <property>
        <name>mapred.reducer.new-api</name>
        <value>true</value>
    </property>

    <property>
        <name>mapreduce.reduce.class</name>
        <value>org.apache.hadoop.mapreduce.Reducer</value>
    </property>

</configuration>