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From "Jonathan Ellis (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-3328) make leveled compaction suck less for insert-heavy workloads
Date Fri, 07 Oct 2011 02:50:29 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-3328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis resolved CASSANDRA-3328.
---------------------------------------

    Resolution: Not A Problem
    
> make leveled compaction suck less for insert-heavy workloads
> ------------------------------------------------------------
>
>                 Key: CASSANDRA-3328
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3328
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Jonathan Ellis
>            Priority: Minor
>         Attachments: 3328.txt
>
>
> In insert-heavy workloads, leveled compaction needs to do a lot of "promotion" from one
level to a higher one, where the higher level has no overlapping sstables. We can optimize
a lot of these away by not bothering to rewrite sstables that are younger than GCGraceSeconds.

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