[CASSANDRA-17774] Implement SSTable count by TWCS bucket

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 5.0-alpha1, 5.0
• Component/s: Local/Compaction/TWCS
• Change Category: Operability
• Complexity: Normal
• Platform: All

Source Control Link

https://gitbox.apache.org/repos/asf?p=cassandra.git;a=commit;h=0daf21244fc0187d092616834d38df1a77dcabf0

Test and Documentation Plan

New unit testing

• Assignee: Josh McKenzie
• Reporter: Josh McKenzie

Authors

Josh McKenzie

Reviewers

Caleb Rackliffe

• Created: 25/Jul/22 15:48
• Updated: 12/Sep/23 13:02
• Resolved: 01/Aug/22 18:23

Description

It should be possible to report the total number of sstables in buckets by using a JMX call getSSTableCountPerTWCSBucket(), similarly to getSSTableCountPerLevel(). This will help us to assert the compaction strategy is able to keep up with major compactions on older time buckets.