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Posted to commits@cassandra.apache.org by "Jonathan Ellis (JIRA)" <ji...@apache.org> on 2013/09/28 17:34:04 UTC

[jira] [Created] (CASSANDRA-6109) Consider coldness in STCS compaction

Jonathan Ellis created CASSANDRA-6109:
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             Summary: Consider coldness in STCS compaction
                 Key: CASSANDRA-6109
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6109
             Project: Cassandra
          Issue Type: New Feature
          Components: Core
            Reporter: Jonathan Ellis
            Assignee: Tyler Hobbs
             Fix For: 2.0.2


I see two options:

# Don't compact cold sstables at all
# Compact cold sstables only if there is nothing more important to compact

The latter is better if you have cold data that may become hot again...  but it's confusing if you have a workload such that you can't keep up with *all* compaction, but you can keep up with hot sstable.  (Compaction backlog stat becomes useless since we fall increasingly behind.)

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