Select the role type for the group. You can select role types
that allow multiple instances and that exist for the service you have
In the Copy From field, select the source of the basic
configuration information for the role group:
An existing role group of the appropriate type.
None.... The role group is set up with generic default
values that are not the same as the values Cloudera Manager sets in the default
role group, as Cloudera Manager specifically sets the appropriate configuration
properties for the services and roles it installs. After you create the group you must
edit the configuration to set missing properties (for example the TaskTracker Local Data
Directory List property, which is not populated if you select None) and clear other
validation warnings and errors.