Keith Turner created ACCUMULO-4314:
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Summary: Use statistics to choose better keys for RFile index
Key: ACCUMULO-4314
URL: https://issues.apache.org/jira/browse/ACCUMULO-4314
Project: Accumulo
Issue Type: Improvement
Reporter: Keith Turner
Assignee: Keith Turner
Fix For: 1.6.6, 1.7.2
The commit for ACCUMULO-1124 makes two changes :
* Generates shorter keys that may not exist in data to place in RFile index
* Use statistics to make better choices about what keys to place in index.
These changes look for keys that are average or below and excludes large keys
(keys that are > 3 std dev).
The change to generate shorter keys can not be made in 1.7.X and 1.6.X because
it would generate RFiles that may not work properly with older 1.6 and 1.7
versions. However the changes to use statistics to pick better keys could be
made in 1.6 and 1.7.
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