Changing the replication factor of an existing file in HDFS
In this recipe, we are going to take a look at how to change the replication factor of a file in HDFS. The default replication factor is 3.
Getting ready
To perform this recipe, you should already have a running Hadoop cluster.
How to do it...
Sometimes. there might be a need to increase or decrease the replication factor of a specific file in HDFS. In this case, we'll use the setrep
command.
This is how you can use the command:
hadoop fs -setrep [-R] [-w] <noOfReplicas><path> ...
In this command, a path can either be a file or directory; if its a directory, then it recursively sets the replication factor for all replicas.
- The
w
option flags the command and should wait until the replication ...
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