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https://issues.apache.org/jira/browse/HDFS-7348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14518918#comment-14518918
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Li Bo commented on HDFS-7348:
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Thanks Yi for the great work!
I think decreasing network I/O is very important for a cluster using EC, for
read part, we may read blocks in sequence; for write part, we may first write
decoded blocks to local disk and then send them to remote datanodes. This may
slow the recovery work, but we reduce the impaction to network I/O especially
when the cluster is busy.
For reader and writer, I think we may separate them out as independent classes
so that other tasks can also use them.
> Erasure Coding: striped block recovery
> --------------------------------------
>
> Key: HDFS-7348
> URL: https://issues.apache.org/jira/browse/HDFS-7348
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Reporter: Kai Zheng
> Assignee: Yi Liu
> Attachments: ECWorker.java, HDFS-7348.001.patch
>
>
> This JIRA is to recover one or more missed striped block in the striped block
> group.
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