[CASSANDRA-5515] Track sstable coldness

• Type: New Feature
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.0.2
• Assignee: Tom Hobbs
• Reporter: Jonathan Ellis

Authors

Tom Hobbs

Reviewers

Jonathan Ellis

• Created: 25/Apr/13 16:32
• Updated: 16/Apr/19 09:32
• Resolved: 28/Sep/13 15:27

Description

Keeping a count of reads per-sstable would allow STCS to automatically ignore cold data rather than recompacting it constantly with hot data, dramatically reducing compaction load for typical time series applications and others with time-correlated access patterns. We would not need a separate age-tiered compaction strategy.

(This will really be useful in conjunction with CASSANDRA-5514.)

Issue Links

• is depended upon by: CASSANDRA-5519 Reduce index summary memory use for cold sstables