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https://issues.apache.org/jira/browse/HDFS-8799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14642686#comment-14642686
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Takanobu Asanuma commented on HDFS-8799:
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Thanks for the great work, [~walter.k.su]!
I read and ran your patch. It looks good to me(non-binding). And I was able to
get familiar with recovery work about ec.
And I did some test with your patch. If we want to recover all ec blocks, we
need at least nine datanodes which don't have the corrupt blocks, right?
So if there are 3 corrupt ec blocks in one ec block group, we need at least 12
datanodes to recover the all ec blocks. This is not unintuitive. How about add
this case?
> Erasure Coding: add tests for namenode processing corrupt striped blocks
> ------------------------------------------------------------------------
>
> Key: HDFS-8799
> URL: https://issues.apache.org/jira/browse/HDFS-8799
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: test
> Reporter: Walter Su
> Assignee: Walter Su
> Priority: Minor
> Attachments: HDFS-8799-HDFS-7285.01.patch
>
>
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