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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5029) Add back bloom filter to LCS
Date Wed, 05 Dec 2012 05:18:58 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13510282#comment-13510282
] 

Jonathan Ellis commented on CASSANDRA-5029:
-------------------------------------------

committed
                
> Add back bloom filter to LCS
> ----------------------------
>
>                 Key: CASSANDRA-5029
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5029
>             Project: Cassandra
>          Issue Type: Improvement
>    Affects Versions: 1.2.0 beta 2
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>             Fix For: 1.2.0 rc1
>
>         Attachments: 5029.txt
>
>
> Even with LCS you're going to frequently have 6 or 7 levels, with data in only one or
two of those.  With randomly distributed writes you'll have overlapping sstables in the other
levels so having a bloom filter will be good to avoid hitting disk.

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