Hadoop HDFS balancer

Utility to Balance a Cluster in Hadoop

Using hdfs balancer command.

  

Eg.

Runs a cluster balancing utility. An administrator can simply press Ctrl-C to stop the rebalancing process. See Balancer for more details.

Usage: hdfs balancer [-threshold <threshold>] [-policy <policy>]

COMMAND_OPTION	Description
-threshold threshold	Percentage of disk capacity. This overwrites the default threshold.
-policy policy	datanode (default): Cluster is balanced if each datanode is balanced.  
blockpool: Cluster is balanced if each block pool in each datanode is balanced.
Note that the blockpool policy is more strict than the datanode policy.


Input:
Threshold:
Policy:
Result: