[CASSANDRA-17898] Add metrics around storage usage and compression to enable easier comparison between existing and new compression algorithms

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 5.0-alpha1, 5.0
• Component/s: Observability/Metrics
• Change Category: Operability
• Complexity: Low Hanging Fruit
• Platform: All

Source Control Link

https://gitbox.apache.org/repos/asf?p=cassandra.git;a=commit;h=bd2ecb3454649d8c84cf0b1ce8c1e94ed1e06e74

Test and Documentation Plan

New unit testing; modifying existing unit testing to check new metrics

• Assignee: Josh McKenzie
• Reporter: Josh McKenzie

Authors

Josh McKenzie

Reviewers

Caleb Rackliffe

• Created: 14/Sep/22 19:09
• Updated: 12/Sep/23 13:02
• Resolved: 19/Sep/22 16:05

Description

To track gains in efficiency of compression and provide a common foundation for comparing different (and new!) compression algorithms we need to add a few new metrics:

• Un-replicated logical storage load
• Un-replicated, uncompressed logical storage load
• Replicated but uncompressed storage load (like storage service load today, but showing compression)