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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5358) Provide scripting functionality to the synthetic load generator
Date Tue, 03 Mar 2009 21:02:56 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12678446#action_12678446
] 

Hairong Kuang commented on HADOOP-5358:
---------------------------------------

The changes look good. One more comment: it looks that you allow duration to be 0 in the script
file. Then the main thread should handle zero duration correctly. I would prefer that no 0
duration is allowed in the script file. If you really want to support the feature, only the
last duration is allowed to be zero.

Also could you please update the synthetic load generator document?

> Provide scripting functionality to the synthetic load generator
> ---------------------------------------------------------------
>
>                 Key: HADOOP-5358
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5358
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: test
>            Reporter: Jakob Homan
>            Assignee: Jakob Homan
>            Priority: Minor
>         Attachments: HADOOP-5358.patch, HADOOP-5358.patch, HADOOP-5358.patch
>
>
> Currently the load generator accepts parameters at start time as to the read and write
probabilities to apply against the namenode.  It would be useful to be able to provide it
with a script of these values, so that they can be varied over time.  This would allow the
namenode to be tested with varying loads over time so its behavior to changing loads can be
examined.

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