Hadoop HDFS datanode

Utility to Run a HDFS Data Node in Hadoop

Using hdfs datanode command.

  

Eg.

Runs a HDFS datanode.

Usage: hdfs datanode [-regular | -rollback | -rollingupgrace rollback]

COMMAND_OPTION	Description
-regular	Normal datanode startup (default).
-rollback	Rollback the datanode to the previous version. This should be used after stopping the datanode and distributing the old hadoop version.
-rollingupgrade rollback	Rollback a rolling upgrade operation.


Input:
Result: