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https://issues.apache.org/jira/browse/HDFS-6450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14349724#comment-14349724
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Zhe Zhang commented on HDFS-6450:
---------------------------------
I just posted a
[patch|https://issues.apache.org/jira/secure/attachment/12702940/HDFS-7782-001.patch]
under HDFS-7782. It makes some changes to {{DFSInputStream}} that should
partially support this JIRA too:
# A small {{HedgedReadResult}} class to return both a result buffer and a
generated {{BlockReader}} which should be used to adjust the maintained
{{blockBreader}}
# In {{hedgedFetchBlockByteRange}}, return the reader from the fastest Future
# That JIRA has the hedged read logic in {{readBuffer()}} instead of
{{readWithStrategy}} level. I'm not so sure which option is better though.
[~xieliang007] I wonder if you still plan to continue this work? In either case
I'm happy to help complete this JIRA.
> Support non-positional hedged reads in HDFS
> -------------------------------------------
>
> Key: HDFS-6450
> URL: https://issues.apache.org/jira/browse/HDFS-6450
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.4.0
> Reporter: Colin Patrick McCabe
> Assignee: Liang Xie
> Attachments: HDFS-6450-like-pread.txt
>
>
> HDFS-5776 added support for hedged positional reads. We should also support
> hedged non-position reads (aka regular reads).
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