Database Reference
In-Depth Information
Role management in Cloudera Manager
Cloudera Manager uses
roles
to define the configuration of different hosts in a cluster.
Each role will have a certain set of properties and configurations defined that can be ap-
plied to a node in the cluster. The role applied to a node will define the different Hadoop
services that will run on that specific node.
The following is the list of a few roles applied to a host by Cloudera Manager:
•
Balancer
: This role is responsible for balancing the blocks across the different
nodes on the cluster
•
DataNode
: This role defines all the configurations required to start a datanode on
the host
•
NameNode
: This role defines all the configurations required to start a namenode
on the host
•
SecondaryNameNode
: This role defines all the configurations required to start a
secondary namenode on the host
•
JobTracker
: This role defines all the configurations required to start a jobtracker
on the host
•
TaskTracker
: This role defines all the configurations required to start a tasktracker
on the host
