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From "Marcus Eriksson (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-7065) Add some extra metadata in leveled manifest to be able to reduce the amount of sstables searched on read path
Date Tue, 22 Apr 2014 08:35:16 GMT
Marcus Eriksson created CASSANDRA-7065:
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             Summary: Add some extra metadata in leveled manifest to be able to reduce the
amount of sstables searched on read path
                 Key: CASSANDRA-7065
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7065
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Marcus Eriksson


Based on this;
http://rocksdb.org/blog/431/indexing-sst-files-for-better-lookup-performance/

By keeping pointers from the sstables in lower to higher levels we could reduce the number
of candidates in higher levels, ie, instead of searching all 1000 L3 sstables, we use the
information from the L2 search to include less L3 sstables.

First we need to figure out if this can beat our IntervalTree approach (and if the win is
worth it).



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