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in HDFS by
Q:
Is there any way to change the replication of files on HDFS after they are already written to HDFS?

1 Answer

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Yes, the following are ways to change the replication of files on HDFS:

We can change the dfs.replication value to a particular number in the $HADOOP_HOME/conf/hadoop-site.xml file, which will start replicating to the factor of that number for any new content that comes in.

If you want to change the replication factor for a particular file or directory, use:

$HADOOP_HOME/bin/Hadoop dfs –setrep –w4 /path of the file

Example: $HADOOP_HOME/bin/Hadoop dfs –setrep –w4 /user/temp/test.csv

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