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Posted to commits@cassandra.apache.org by "Stu Hood (JIRA)" <ji...@apache.org> on 2010/06/18 02:16:22 UTC
[jira] Updated: (CASSANDRA-1207) Don't write BloomFilters for
skinny rows
[ https://issues.apache.org/jira/browse/CASSANDRA-1207?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Stu Hood updated CASSANDRA-1207:
--------------------------------
Attachment: 0001-Return-alwaysMatchingBloomFilter-for-0-length-filter.patch
0002-Conditionally-write-the-row-bloom-filter.patch
Patchset to conditionally write row BloomFilters, and to use alwaysMatchingBloomFilter when a custom filter has not been written for the row.
> Don't write BloomFilters for skinny rows
> ----------------------------------------
>
> Key: CASSANDRA-1207
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1207
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Stu Hood
> Priority: Critical
> Fix For: 0.7
>
> Attachments: 0001-Return-alwaysMatchingBloomFilter-for-0-length-filter.patch, 0002-Conditionally-write-the-row-bloom-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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