[CASSANDRA-18397] CEP-26: Unified Compaction Strategy

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

Source Control Link

https://github.com/blambov/cassandra/tree/CASSANDRA-18397

Test and Documentation Plan

Unit tests, additional test target with UCS as the default strategy, chaos testing.

• Assignee: Branimir Lambov Assign to me
• Reporter: Branimir Lambov

Authors

Alex Sorokoumov, Branimir Lambov, Dimitar Dimitrov, Stefania Alborghetti

Reviewers

Alex Sorokoumov, Jaroslaw Grabowski, Maxwell Guo

• Created: 31/Mar/23 13:54
• Updated: 20/Oct/23 12:21
• Resolved: 24/Jul/23 08:04

Description

Implementation of Unified Compaction Strategy per CEP-26.

Further documentation of the most current state of the solution can be found in the included markdown documentation.

Issue Links

• causes: CASSANDRA-18945 Unified Compaction Strategy is creating too many sstables
• contains: CASSANDRA-18123 Reuse of metadata collector can break key count calculation
• links to: DTest pull request #227
• links to: GitHub Pull Request #2287