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From "Ryan McGuire (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-7260) Stress overflows past 2^31 keys
Date Sat, 17 May 2014 18:55:15 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-7260?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ryan McGuire updated CASSANDRA-7260:
------------------------------------

    Assignee: Benedict

> 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
>            Assignee: Benedict
>            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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