[CASSANDRA-16782] Improve the way we pick sstables for STCS-in-L0 and in TWCS 'current' window

• Type: Improvement
• Status: Review In Progress
• Priority: Normal
• Resolution: Unresolved
• Fix Version/s: 5.x
• Component/s: Local/Compaction/LCS, Local/Compaction/TWCS
• Change Category: Operability
• Complexity: Normal
• Platform: All

Test and Documentation Plan

cci run

• Assignee: Marcus Eriksson
• Reporter: Marcus Eriksson

Authors

Marcus Eriksson

Reviewers

Aleksei Zotov, Branimir Lambov

• Created: 01/Jul/21 14:43
• Updated: 07/Mar/23 10:53

Description

The goal when being behind in L0 should always be to get the number of sstables down to a reasonable level as soon as possible. Currently it is common that we run compactions on the large sstables but leave thousands of tiny sstables behind.

Issue Links

• is duplicated by: CASSANDRA-16881 L0 compactions never recover when thousands unleveled