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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 Mon, 02 Mar 2009 22:56:56 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12678143#action_12678143
] 

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

command-line arguments parsing:
when -scriptFile is specified, makes sure that neither rp, wp, nor ealspsed time is specified.
 
loadScriptFile:
1. should put file close in finally to make the script file is closed even if errors occur
when reading the file;
2. better check the validity of read and write probabilities (r+w should smaller than 1) while
reading the script file so no need to continue reading if there is an invalid parameter.
3. could use List.toArray to do the array conversion;
4. what if the script file contains no valid lines

> 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
>
>
> 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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