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From "Jonathan Ellis (JIRA)" <>
Subject [jira] Updated: (CASSANDRA-1207) Don't write BloomFilters for skinny rows
Date Sun, 01 Aug 2010 01:25:17 GMT


Jonathan Ellis updated CASSANDRA-1207:

    Fix Version/s: 0.7.1
                       (was: 0.8)

After thinking about this (and writing CASSANDRA-1338) I think the automatic approach is better
than having users specify something in the CF definition.  I do think we need some testing
to find out what the right threshold is, though.

> Don't write BloomFilters for skinny rows
> ----------------------------------------
>                 Key: CASSANDRA-1207
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Stu Hood
>            Priority: Minor
>             Fix For: 0.7.1
>         Attachments: 0001-Return-alwaysMatchingBloomFilter-for-0-length-filter.patch,
> All rows currently contain a serialized BloomFilter, regardless of size. For smaller
rows, it is much more efficient in space and CPU time to not write a BloomFilter, and to eagerly
perform lookups against the existing columns.

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