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https://issues.apache.org/jira/browse/HDFS-7348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14520910#comment-14520910
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Zhe Zhang commented on HDFS-7348:
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bq. Currently the default cell size is 256KB, it's not a small value, we can
also expose it as a configuration.
That sounds good to me. My point was we probably shouldn't tie it to the
striping cell size. Can we make this sync-and-decode unit a configurable number
by itself?
bq. About the sequential vs. parallel reading, if it's a pain decision, then I
can make it configurable too.
That is a lot of work (I imagine) and I don't think we need to do it now.
bq. So guys, let's have a conclusion: how about we do as following:...
I agree with this plan overall. The only thing that I think should go into this
patch instead of a follow-on is to decouple buffer size from cell size, per
above comment.
> 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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