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From "Jason Brown (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-4885) Remove or rework per-row bloom filters
Date Fri, 30 Nov 2012 22:21:59 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13507709#comment-13507709
] 

Jason Brown edited comment on CASSANDRA-4885 at 11/30/12 10:21 PM:
-------------------------------------------------------------------

This seems reasonable to me. Let me do some more reading/research, and I think this should
be doable. Let me rework my patch, then.
                
      was (Author: jasobrown):
    This seems reasonable to me. Let me do some more reading/research, and I think this should
be doable. 
                  
> Remove or rework per-row bloom filters
> --------------------------------------
>
>                 Key: CASSANDRA-4885
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4885
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Jason Brown
>             Fix For: 1.3
>
>         Attachments: 0001-CASSANRDA-4885-Remove-per-row-bloom-filter.patch, 0002-CASSANRDA-4885-update-test.patch
>
>
> Per-row bloom filters may be a misfeature.
> On small rows we don't create them.
> On large rows we essentially only do slice queries that can't take advantage of it.
> And on very large rows if we ever did deserialize it, the performance hit of doing so
would outweigh the benefit of skipping the actual read.

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