[CASSANDRA-5371] Perform size-tiered compactions in L0 ("hybrid compaction")

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.0 beta 1
• Labels: lcs
• Severity: Normal
• Assignee: Jonathan Ellis
• Reporter: Jonathan Ellis

Authors

Jonathan Ellis

Reviewers

T Jake Luciani

• Created: 21/Mar/13 15:22
• Updated: 16/Apr/19 09:32
• Resolved: 08/Apr/13 18:24

Description

If LCS gets behind, read performance deteriorates as we have to check bloom filters on man sstables in L0. For wide rows, this can mean having to seek for each one since the BF doesn't help us reject much.

Performing size-tiered compaction in L0 will mitigate this until we can catch up on merging it into higher levels.

Issue Links

• is duplicated by: CASSANDRA-3854 Lower levels should have higher priority in LeveledCompactionStrategy