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Posted to dev@hbase.apache.org by "Lars Hofhansl (JIRA)" <ji...@apache.org> on 2014/02/16 20:57:19 UTC

[jira] [Created] (HBASE-10552) HFilePerformanceEvaluation.GaussianRandomReadBenchmark fails sometimes.

Lars Hofhansl created HBASE-10552:
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             Summary: HFilePerformanceEvaluation.GaussianRandomReadBenchmark fails sometimes.
                 Key: HBASE-10552
                 URL: https://issues.apache.org/jira/browse/HBASE-10552
             Project: HBase
          Issue Type: Bug
            Reporter: Lars Hofhansl
            Priority: Minor


GaussianRandomReadBenchmark generates seek keys by using a Gaussian distribution with the mean of N/2 and a sigma of N/10 (N = number of rows used)  and using this key directly to seek into the HFile. The HFile was seeded with keys from 0-N.

This will fail if we ever generate a key < 0, which is rare, but by no means impossible. We need to clamp the min and max values to 0 and 2*N, resp.



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