[jira] [Created] (CASSANDRA-6389) Check first and last key to potentially skip SSTable for reads

["Tyler Hobbs (JIRA)" <ji...@apache.org>]

Tyler Hobbs created CASSANDRA-6389:
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             Summary: Check first and last key to potentially skip SSTable for reads
                 Key: CASSANDRA-6389
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6389
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Tyler Hobbs
            Assignee: Tyler Hobbs
            Priority: Minor


In {{SSTableReader.getPosition()}}, we use a -1 result from a binary search on the index summary to check if the requested key falls before the start of the sstable.  Instead, we can directly compare the requested key with the {{first}} and {{last}} keys for the sstable, which will allow us to also skip keys that fall after the last key in the sstable.



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