[jira] Updated: (CASSANDRA-792) Configurable 'merge factor' for Column Families

["Stu Hood (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-792?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stu Hood updated CASSANDRA-792:
-------------------------------

    Attachment: 0004-Configurable-MergeFactor.patch

Implements configurable MergeFactors per column family.

This patchset also removes the ability to set compaction thresholds via JMX, which we should probably add back on a per-columnfamily basis.

> Configurable 'merge factor' for Column Families
> -----------------------------------------------
>
>                 Key: CASSANDRA-792
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-792
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Stu Hood
>             Fix For: 0.6
>
>         Attachments: 0001-Use-logarithmic-bucket-sizes-and-always-compact-the-.patch, 0002-Cap-memory-usage-for-all-SSTables-being-compacted.patch, 0003-Hardcoded-per-cf-merge-factor.patch, 0004-Configurable-MergeFactor.patch
>
>
> Apache Lucene flushes and merges 'segments' in a manner that is quite similar to the treatment of Cassandra's sstables.
> One interesting and powerful tunable that Lucene provides is 'mergeFactor': http://hudson.zones.apache.org/hudson/job/Lucene-trunk/javadoc/core/index.html

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