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From "Ariel Weisberg (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-13078) Increase unittest test.runners to speed up the test
Date Mon, 10 Jul 2017 19:36:00 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-13078?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16080944#comment-16080944
] 

Ariel Weisberg commented on CASSANDRA-13078:
--------------------------------------------

Looks good. Can you post patches for 3.0 and 3.11? It's not a change to the core code base
and we still run those tests quite a bit so it would be nice to have it going back to 3.0.

> Increase unittest test.runners to speed up the test
> ---------------------------------------------------
>
>                 Key: CASSANDRA-13078
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13078
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Testing
>            Reporter: Jay Zhuang
>            Assignee: Jay Zhuang
>            Priority: Minor
>         Attachments: unittest.png, unittest_time.png
>
>
> The unittest takes very long time to run (about 40 minutes on a macbook). By overriding
the [{{test.runners}}|https://github.com/apache/cassandra/blob/cassandra-3.0/build.xml#L62],
it could speed up the test, especially on powerful servers. Currently, it's set to 1 by default.
I would like to propose to set the {{test.runners}} by the [number of CPUs dynamically|http://www.iliachemodanov.ru/en/blog-en/15-tools/ant/48-get-number-of-processors-in-ant-en].
For example, {{runners = num_cores / 4}}. What do you guys think?



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