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https://issues.apache.org/jira/browse/HDFS-9040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14738076#comment-14738076
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Li Bo commented on HDFS-9040:
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Implementing a block group writer is a better solution but you have to copy a
lot of existing code to the new class, which may be hard to be accepted by
community. At beginning I also tried this way but gave up after discussion.
Current design and implementation give as few changes as possible to the
existing code.
> Erasure coding: A BlockGroupDataStreamer to rule all internal blocks streamers
> ------------------------------------------------------------------------------
>
> Key: HDFS-9040
> URL: https://issues.apache.org/jira/browse/HDFS-9040
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Walter Su
> Assignee: Walter Su
>
> A {{BlockGroupDataStreamer}} to communicate with NN to allocate/update block,
> and {{StripedDataStreamer}} s only have to stream blocks to DNs.
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