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Posted to commits@cassandra.apache.org by "Jeremiah Jordan (JIRA)" <ji...@apache.org> on 2013/09/26 00:16:04 UTC

[jira] [Commented] (CASSANDRA-5515) Track sstable coldness

    [ https://issues.apache.org/jira/browse/CASSANDRA-5515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13778157#comment-13778157 ] 

Jeremiah Jordan commented on CASSANDRA-5515:
--------------------------------------------

[~thobbs] does CASSANDRA-6010 do what you need?
                
> Track sstable coldness
> ----------------------
>
>                 Key: CASSANDRA-5515
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5515
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Tyler Hobbs
>             Fix For: 2.0.2
>
>         Attachments: 0001-Track-row-read-counts-in-SSTR.patch, 5515-2.0-v1.txt
>
>
> 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.)

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