yangwenbo created KYLIN-4796:
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Summary: Question for the accuracy of the Approximate Top-N
Key: KYLIN-4796
URL: https://issues.apache.org/jira/browse/KYLIN-4796
Project: Kylin
Issue Type: Test
Components: Measure - TopN
Reporter: yangwenbo
Hi
I am new to the kylin, and I have read the
blog([http://kylin.apache.org/blog/2016/03/19/approximate-topn-measure/)] about
the support for the approximate topn, there is a accuracy report for the
designed test case, I find this test case
(TopNCounterTest.testParallelSpaceSaving), and test some couples of factors,
such like 10,000 Element cardinality, 20x space, and exponent = 0.5, 1 million
records, it can pass the test which used compareResult method, and it
contradicts the 78% reported in the blog，and I'm confused to this result.
If I have any misunderstanding, please let me know. Looking forward to your
reply
h3.
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