[jira] Commented: (CASSANDRA-514) stress.py fixes and improvements

["Brandon Williams (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12770156#action_12770156 ] 

Brandon Williams commented on CASSANDRA-514:
--------------------------------------------

I should also note that I changed STDEV to be a function of the TOTAL_KEYS.  At 30%, there's around a 60-68% repeat rate on reads.

> stress.py fixes and improvements
> --------------------------------
>
>                 Key: CASSANDRA-514
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-514
>             Project: Cassandra
>          Issue Type: Improvement
>         Environment: debian amd64 Java(TM) SE Runtime Environment (build 1.6.0_12-b04)
>            Reporter: Brandon Williams
>            Priority: Minor
>         Attachments: multiproc.patch
>
>
> stress.py cannot currently fully stress cassandra.  This is due to at least two reasons:
> 1. It does not use the accelerated thrift protocol (thanks jbellis)
> 2. The GIL is preventing concurrency
> To address this, I've modified it in a backwards-compatible way to support multiprocessing, if available.
> Also, key_generator was providing floats instead of integers, causing the read test to ask for keys that did not exist.

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