2. Add the Topology Script Property to core-site.xml

  1. Stop HDFS using the applicable commands in the "Controlling HDP Services Manually" section of Installing HDP Manually

  2. Add the following property to core-site.xml:

    <property>
    <name>net.topology.script.file.name</name> 
    <value>/etc/hadoop/conf/rack-topology.sh</value>
    </property>

By default the topology script will process up to 100 requests per invocation. You can also specify a different number of requests with the net.topology.script.number.args property. For example:

<property> 
<name>net.topology.script.number.args</name> 
<value>75</value>
</property>