Permanent deletion of a segment in Apache Druid (incubating) has two steps:
For documentation on retention rules, please see Data Retention.
For documentation on disabling segments using the Coordinator API, please see Coordinator Delete API
A data deletion tutorial is available at Tutorial: Deleting data
Kill tasks delete all information about a segment and removes it from deep storage. Killable segments must be disabled (used==0) in the Druid segment table. The available grammar is:
{ "type": "kill", "id": <task_id>, "dataSource": <task_datasource>, "interval" : <all_segments_in_this_interval_will_die!>, "context": <task context> }