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From "Konstantin Boudnik (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-6980) Add abstraction layer to isolate cluster deployment mechanisms
Date Wed, 29 Sep 2010 16:16:34 GMT
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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