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From "Alex Loddengaard (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6248) Circus: Proposal and Preliminary Code for a Hadoop System Testing Framework
Date Wed, 16 Sep 2009 21:51:57 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6248?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12756244#action_12756244
] 

Alex Loddengaard commented on HADOOP-6248:
------------------------------------------

{quote}This is not ready to commit. It may be useful at somepoint, but there is currently
no value there. It is hard to evaluate what you are trying to accomplish, since this is just
an empty shell. There needs to be substantial added value over the current distribution to
be worth including a patch in our code base.{quote}
Thanks for the feedback, Owen.  My game plan is to use Circus to write some interesting system
tests that aren't currently in Hadoop's test plan.  Hopefully then I'll have added good value,
both from the tests themselves, but also from the framework.  I expect to tackle testing distcp
across different versions of Hadoop and HDFS upgrades.  I'd appreciate your input on other
interesting tests I could write.

{quote}Please review the MiniMRCluster and MiniHDFSCluster. We already have a lot of system
tests.{quote}
What I like about Circus is that it uses the shell scripts, which currently don't get tested
at all.  I also think that Circus is more usable than these Java classes for people that aren't
familiar with the Hadoop code base.

Again, thanks for your feedback.  Stay tuned.

> Circus: Proposal and Preliminary Code for a Hadoop System Testing Framework
> ---------------------------------------------------------------------------
>
>                 Key: HADOOP-6248
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6248
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: test
>         Environment: Python, bash
>            Reporter: Alex Loddengaard
>         Attachments: HADOOP-6248.diff, HADOOP-6248_v2.diff, HADOOP-6248_v3.diff
>
>
> This issue contains a proposal and preliminary source code for Circus, a Hadoop system
testing framework.  At a high level, Circus will help Hadoop users and QA engineers to run
system tests on a configurable Hadoop cluster, or distribution of Hadoop.  See the comment
below for the proposal itself.

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