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From "Stu Hood (JIRA)" <j...@apache.org>
Subject [jira] Created: (CASSANDRA-1404) Allow 'nodetool cleanup' to run when disk is more than 50% full
Date Tue, 17 Aug 2010 21:40:15 GMT
Allow 'nodetool cleanup' to run when disk is more than 50% full
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                 Key: CASSANDRA-1404
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1404
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Stu Hood
            Priority: Minor


Compaction sums the sizes of all ranges to estimate the output size in order to pick a target
drive. Anti-compactions directly drop ranges from sstables, and the volume of data dropped
can easily be calculated using the SSTable index. Using this knowledge in our estimate in
ColumnFamilyStore.getExpectedCompactedFileSize would allow 'nodetool cleanup' to run when
less than 50% of disk is available, in the case where ranges are being dropped (post node-move).

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