[IOTDB-460] [Distributed] Remove data of outdated slots

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Labels: data-transfer distributed
• Assignee: Tian Jiang
• Reporter: Tian Jiang
• Created: 05/Feb/20 08:51
• Updated: 22/Sep/20 01:22
• Resolved: 22/Sep/20 01:22

Description

In node addition/removal, the slots managed by a node will change. However, the data of corresponding slots cannot be removed yet because the new holders of the slots will pull such data to themselves. As the data pulling is issued by the new holders randomly, it is hard for the previous holders to find out when will the data be needless. As a result, the previous holder cannot delete the local data with confidence.

It will be necessary to find a way for the previous holders to know when the data has been replicated to the new holders so that they will be able to remove the local data.

Issue Links

• is a child of: IOTDB-68 IoTDB supports distributed version