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From "Konstantin Boudnik (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6980) Add abstraction layer to isolate cluster deployment mechanisms
Date Wed, 29 Sep 2010 23:28:33 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12916305#action_12916305
] 

Konstantin Boudnik commented on HADOOP-6980:
--------------------------------------------

Thank you, Tom. In fact, I was too having this in mind as an example and will be looking into
it shortly.

> Add abstraction layer to isolate cluster deployment mechanisms
> --------------------------------------------------------------
>
>                 Key: HADOOP-6980
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6980
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: test
>    Affects Versions: 0.22.0
>            Reporter: Konstantin Boudnik
>
> Certain types of system tests might require to perform a fresh deployment of a test cluster
(e.g. upgrade tests, and similar).
> This can be achieved by having an external way of deploying clusters and then running
the tests. However, this won't work if re-deployment is needed in a middle of such test execution.
In this case, Herriot needs to be able to explicitly call a deployment mechanism to carry
on the process.
> However, there are many possible ways of implementing cluster deployment and Herriot
couldn't possibly be aware about all of them nor should be able to satisfy all their different
interfaces. Thus an abstract interface should isolate plug-gable concrete implementations.
 

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