Configuration Property

Configuration property managed by Ambari, such as NameNode heapsize or replication factor.

Configuration Type (Config Type)

Group of configuration properties. For example: hdfs-site is a Config Type.

Service Configurations

Set of configuration types for a particular service. For example: hdfs-site and core-site Config Types are part of the HDFS Service Configuration.

Change Notes

Optional notes to save with a service configuration change.

Service Config Version (SCV)

Particular version of configurations for a specific service. Ambari saves a history of service configuration versions.

Host Config Group (HCG)

Set of configuration properties to apply to a specific set of hosts. Each service has a default Host Config Group, and custom config groups can be created on top of the default configuration group to target property overrides to one or more hosts in the cluster. See Managing Configuration Groups for more information.