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Date: Fri, 13 Oct 2017 10:21:00 +0000 (UTC)
From: "Takanobu Asanuma (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-12637) Extend
 TestDistributedFileSystemWithECFile with a random EC policy
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archived-at: Fri, 13 Oct 2017 10:21:05 -0000


    [ https://issues.apache.org/jira/browse/HDFS-12637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16203349#comment-16203349 ] 

Takanobu Asanuma commented on HDFS-12637:
-----------------------------------------

Thanks for the comment, [~xiaochen].

Yes, that's right. But the random ec policy test is needed for a few reasons which are discussed in HDFS-7866 and HDFS-9962. I would like to quote Andrew's comment from HDFS-9962 that I agree.

bq. We randomized the policy tests to reduce the runtime of the test suite, under the belief that there wasn't much incremental benefit from running all of them every time.

In summary, I'm working on this task following below:
* Default policy (RS-6-3) always gets tested.
* Create a random ec policy test if the test is long-running (e.g. using minicluster many times).
* If the test is short-running, all policies test with parametrizing would be better.

> Extend TestDistributedFileSystemWithECFile with a random EC policy
> ------------------------------------------------------------------
>
>                 Key: HDFS-12637
>                 URL: https://issues.apache.org/jira/browse/HDFS-12637
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: erasure-coding, test
>            Reporter: Takanobu Asanuma
>            Assignee: Takanobu Asanuma
>         Attachments: HDFS-12637.1.patch
>
>


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