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https://issues.apache.org/jira/browse/HDFS-8015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14513671#comment-14513671
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Li Bo commented on HDFS-8015:
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hi, Yi
I think there’re several ways to handle writing a decoded block to remote or
local. My idea is that first get a domain socket which is bound and listened by
{{DataNode#localDataXCeriverServer}}, then write data via the output stream of
this socket. The advantage is that we don’t need to handle the details of block
writing. The next step is to extend {{BlockReceiver}}. Currently it writes to
local disk and may also write to remote. We can add a switcher to control its
writing directions, i.e, only local, only remote, remote + local. We can
discuss this issue after your first patch is ready.
> Erasure Coding: local and remote block writer for coding work in DataNode
> -------------------------------------------------------------------------
>
> Key: HDFS-8015
> URL: https://issues.apache.org/jira/browse/HDFS-8015
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Kai Zheng
> Assignee: Li Bo
> Attachments: HDFS-8015-000.patch
>
>
> As a task of HDFS-7344 ECWorker, in either stripping or non-stripping erasure
> coding, to perform encoding or decoding, we need to be able to write data
> blocks locally or remotely. This is to come up block writer 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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