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https://issues.apache.org/jira/browse/HDFS-8014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14513526#comment-14513526
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Zhe Zhang commented on HDFS-8014:
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Thanks Yi for sharing the insights. Directly using {{BlockReader}} actually
sounds fine. The main additional logic in {{actualGetFromOneDataNode}} is about
retrying. We might need a different retry logic anyway, since each internal
block only has 1 replica (it doesn't make sense trying to find another
location).
> Erasure Coding: local and remote block reader for coding work in DataNode
> -------------------------------------------------------------------------
>
> Key: HDFS-8014
> URL: https://issues.apache.org/jira/browse/HDFS-8014
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Kai Zheng
> Assignee: Zhe Zhang
>
> As a task of HDFS-7344 ECWorker, in either stripping or non-stripping erasure
> coding, to perform encoding or decoding, we need first to be able to read
> locally or remotely data blocks. This is to come up block reader facility in
> DataNode side. Better to think about the similar work done in client side, so
> in future it's possible to unify the both.
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