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From "Joshua Harlow (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-708) A stress-test tool for HDFS.
Date Thu, 29 Apr 2010 20:33:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12862396#action_12862396

Joshua Harlow commented on HDFS-708:

1. Done
2. Done
3. These methods have meanings for null (mainly for default checks for existence for merging)
and a random seed meaning null means no seed which is possible. Duration for milliseconds
can return an int though. Just that null has a meaning if the default value for a config option
is set to be a null object. Which it is in a couple of cases.
4 & 5. Done (we are no measuring only the time around readByte and write())
6. Done
7. Done
8. Done
9 & 10. Done
11. Done and most classes made package private
15. Will add some tests.

> A stress-test tool for HDFS.
> ----------------------------
>                 Key: HDFS-708
>                 URL: https://issues.apache.org/jira/browse/HDFS-708
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: test, tools
>    Affects Versions: 0.22.0
>            Reporter: Konstantin Shvachko
>            Assignee: Joshua Harlow
>             Fix For: 0.22.0
>         Attachments: slive.patch, SLiveTest.pdf
> It would be good to have a tool for automatic stress testing HDFS, which would provide
IO-intensive load on HDFS cluster.
> The idea is to start the tool, let it run overnight, and then be able to analyze possible

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