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https://issues.apache.org/jira/browse/HDFS-9962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16192851#comment-16192851
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Takanobu Asanuma commented on HDFS-9962:
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Hello [~andrew.wang] and [~drankye],

While writing the patches for the subtasks of this jira, I thought it is better 
to check all EC policy every time by parametrized test, rather than choosing an 
EC policy randomly. Comparing to the random policy test (see HDFS-12547), the 
parametrized test (see HDFS-12587) keeps idempotency and simple code. As a 
disadvantage, the parameterized test may become more flakey (especially when 
using minicluster).

I want to hear your opinions. Which do you think is better?

> Erasure Coding: need a way to test multiple EC policies
> -------------------------------------------------------
>
>                 Key: HDFS-9962
>                 URL: https://issues.apache.org/jira/browse/HDFS-9962
>             Project: Hadoop HDFS
>          Issue Type: Test
>            Reporter: Rui Li
>            Assignee: Takanobu Asanuma
>              Labels: hdfs-ec-3.0-nice-to-have
>
> Now that we support multiple EC policies, we need a way test it to catch 
> potential issues.



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