How setrep command is used and what is the description to this

Question

Can any one explain how setrep command is used and what is the description to this?

Answer 1

Hi,

This HDFS command is used to change the replication factor of a file. If the entered path is a directory, then this command changes the replication factor of all the files present in the directory tree rooted at the path provided by user recursively.

HDFS setrep Command usage:

setrep [-R] [-w] rep <path>

HDFS setrep Command Example

hdfs dfs -setrep -w 3 /user/dataflair/dir1

Here, the -w flag requests that the command waits for the replication process to get completed. This may likely take a very long time to get completed.

The -R flag is accepted for backward compatibility. It does not make any changes.