How to set the data replication factor of Hadoop HDFS?

Posted on Mar 24, 2018 by Eric Ma In QA

How to set the data replication factor of Hadoop HDFS in Hadoop 2 (YARN)?

The default replication factor in HDFS is controlled by the dfs.replication property.

The value is 3 by default.

To change the replication factor, you can add a dfs.replication property settings in the hdfs-site.xml configuration file of Hadoop:

<property>
    <name>dfs.replication</name>
    <value>1</value>
    <description>Replication factor.</description>
</property>

The above one make the default replication factor 1.

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