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From "Cliff Moon (JIRA)" <j...@apache.org>
Subject [jira] Created: (CASSANDRA-1891) large supercolumn deserialization invokes CSLM worst case scenario
Date Tue, 21 Dec 2010 20:45:03 GMT
large supercolumn deserialization invokes CSLM worst case scenario
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                 Key: CASSANDRA-1891
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1891
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
    Affects Versions: 0.7.0 rc 2, 0.7.0 rc 1, 0.7 beta 3, 0.7 beta 2, 0.7 beta 1, 0.6.8, 0.6.7,
0.6.6, 0.6.5, 0.6.4, 0.6.3, 0.6.2, 0.6.1, 0.6, 0.5, 0.4, 0.3
            Reporter: Cliff Moon
            Priority: Minor


SuperColumn deserialization hits a worst case insert scenario for CSLM: inserting pre-sorted
entries one at a time.  Inside of CSLM this requires scanning to the end of the list and doing
a comparison at every step for every item inserted.  This patch supplies a SortedMap interface
to the supercolumn deserialization.  CSLM will do a bulk insert from a SortedMap interface
supplied in the constructor.

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