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https://issues.apache.org/jira/browse/HDFS-6450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14064564#comment-14064564
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Liang Xie commented on HDFS-6450:
---------------------------------

bq.  I think in the short term, applications will have to turn on 
non-positional hedged reads explicitly, and accept some small loss in 
throughput for a major reduction in long-tail latency.
yes, it's a trade-off :)

> 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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