mapred-site.xml (MapReduce v1)

The file /opt/mapr/hadoop/hadoop-<version>/conf/mapred-site.xml contains configuration information that overrides the default values for MapReduce parameters. Overrides of the default values for core configuration properties are stored in the mapred-default.xml (MapReduce v1) file.

To override a default value, specify the new value within the <configuration> tags, using the following format:

<property>
  <name> </name>
  <value> </value>
  <description> </description>
</property>

The following configuration tables describe the possible entries to place in the <name> and <value> tags. The <description> tag is optional but recommended for maintainability. There are three parts to mapred-site.xml:

WARNING: You can examine the current configuration information for this node by using the


                    hadoop conf -dump

command from a command line.

Default core-site.xml file

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
               
<!-- Put site-specific property overrides in this file. -->
               
<configuration>
               
</configuration>