Indexing Service

Indexing tasks create (and sometimes destroy) Druid . The indexing service has a master/slave like architecture.

The indexing service is composed of three main components: a Peon component that can run a single task, a component that manages Peons, and an Overlord component that manages task distribution to MiddleManagers. Overlords and MiddleManagers may run on the same process or across multiple processes while MiddleManagers and Peons always run on the same process.