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From "Eric Newton (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-501) RFile should store the key count in metadata
Date Wed, 28 Mar 2012 22:39:26 GMT
RFile should store the key count in metadata
--------------------------------------------

                 Key: ACCUMULO-501
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-501
             Project: Accumulo
          Issue Type: Improvement
            Reporter: Eric Newton
            Assignee: Eric Newton
             Fix For: 1.5.0


BulkImport estimates the number of keys in a file to be zero.  We store the largest and smallest
key in metadata, I think we can afford to store the key count use it to provide an estimate
when we load it into the tablet.  Perhaps if we know the start key is "a" and the end key
is "z" and the tablets range is "a->m" we can just estimate 50% of the key count.

When a bulk file fits completely in a range, the key count estimate will be accurate.

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