[HDDS-1786] Datanodes takeSnapshot should delete previously created snapshots

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.4.0
• Fix Version/s: 0.5.0
• Component/s: Ozone Datanode
• Labels: pull-request-available
• Target Version/s: 0.5.0
• Assignee: Aravindan Vijayan
• Reporter: Mukul Kumar Singh
• Created: 11/Jul/19 19:17
• Updated: 13/Sep/19 17:51
• Resolved: 13/Sep/19 17:51

Description

Right now, after after taking a new snapshot, the previous snapshot file is left in the raft log directory. When a new snapshot is taken, the previous snapshots should be deleted.

Issue Links

• Blocked: RATIS-643 Allow Ratis to take a configurable snapshot retention policy
• links to: GitHub Pull Request #1163