[jira] [Created] (CASSANDRA-7260) Stress overflows past 2^31 keys

["Ryan McGuire (JIRA)" <ji...@apache.org>]

Ryan McGuire created CASSANDRA-7260:
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             Summary: Stress overflows past 2^31 keys
                 Key: CASSANDRA-7260
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7260
             Project: Cassandra
          Issue Type: Bug
          Components: Tools
            Reporter: Ryan McGuire
            Priority: Minor


Writing more than 2^31 keys with stress causes an overflow making stress start to count negative key numbers. It doesn't stop the write, but it does foul up the aggregate statistics:

{code}
2147395249,   69404,   69404,    11.7,     5.1,    35.4,   135.7,   169.9,   250.8,27093.0,  0.00211
-2147481870,   89925,   89925,     9.0,     4.8,    27.1,   110.3,   120.3,   128.5,27094.0,  0.00211

.....
-1894967296,    7318,    7318,     0.7,     0.6,     0.8,     1.9,    60.4,    60.4,30546.6,  0.00197


Results:
real op rate              : -62035
adjusted op rate stderr   : 0
key rate                  : -62035
latency mean              : -13.0
latency median            : 3.9
latency 95th percentile   : 16.2
latency 99th percentile   : 35.1
latency 99.9th percentile : 170.1
latency max               : 4376.7
Total operation time      : 08:29:06
END
{code}



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