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From "Kannan Muthukkaruppan (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2127) randomWrite mode of PerformanceEvaluation benchmark program writes only to a small range of keys
Date Fri, 15 Jan 2010 00:42:54 GMT
randomWrite mode of PerformanceEvaluation benchmark program writes only to a small range of
keys
------------------------------------------------------------------------------------------------

                 Key: HBASE-2127
                 URL: https://issues.apache.org/jira/browse/HBASE-2127
             Project: Hadoop HBase
          Issue Type: Bug
          Components: test
    Affects Versions: 0.20.2
         Environment: not relevant
            Reporter: Kannan Muthukkaruppan
            Priority: Minor


"randomWrite" mode of PerformanceEvaluation (PE), with nclients > 1, does random writes
only within a small range rather than across all rows.

e.g, for:

./bin/hbase org.apache.hadoop.hbase.PerformanceEvaluation --nomapred --rows=1000 randomWrite
10

[Note: As per convention in all modes of PE, --rows is the number of rows per client]

So for the above, with # of clients set to 10, currently all clients generate writes to keys
in the 0..999 range instead of the 0..9999 range.

[Fix appears to be simple. Will provide a patch.]

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