aggressiveness_of_namenode_in_block_replication.md

Aggressiveness of NameNode in block replication

Date: Feb 23, 2016

When you want your NameNode to increase the speed of replicating under-replicated blocks you can tweak these options

• dfs.datanode.balance.bandwidthPerSec
• dfs.namenode.replication.max-streams
• Datanode Java HeapSize

Note: The NameNode and DataNodes will consume more RAM/CPU when you set this