[CASSANDRA-16815] Background schedule to clean up orphaned hints files

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 4.1-alpha1, 4.1
• Component/s: Local/Other
• Change Category: Operability
• Complexity: Normal
• Platform: All

Source Control Link

https://github.com/apache/cassandra/commit/8acbbe042b236c6948845ecd7af093c6f0fa3e4b

Test and Documentation Plan

circle ci; unit test

• Assignee: Yifan Cai
• Reporter: Yifan Cai

Authors

Yifan Cai

Reviewers

Brandon Williams, Chris Lohfink

• Created: 28/Jul/21 00:13
• Updated: 27/May/22 19:25
• Resolved: 11/Aug/21 04:49

Description

Host replacement is possible to produce orphaned hints files that the original associated host ID no longer exist in the cluster (i.e., being replaced). Those orphaned hints files will not be dispatched and only consumes up the disk space.

We can have a background schedule that infrequently checks and deletes the files if they are orphaned and have exceeded the TTL.