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https://issues.apache.org/jira/browse/FLINK-19938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17298502#comment-17298502
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junbiao chen commented on FLINK-19938:
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Hi! Shuffle IO scheduling is a good idea for improving IO peformance.But there
is a point need to consider，which is Linux IO scheduler. When linux receive IO
request,Linux IO scheduler will schedule these IO requests,IO requests will be
merged and sorted.Linux‘s IO requests sorting seems to have done what Shuffle
IO scheduling can do.
> Implement shuffle data read scheduling for sort-merge blocking shuffle
> ----------------------------------------------------------------------
>
> Key: FLINK-19938
> URL: https://issues.apache.org/jira/browse/FLINK-19938
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Network
> Reporter: Yingjie Cao
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.13.0
>
>
> As described in
> [https://cwiki.apache.org/confluence/display/FLINK/FLIP-148%3A+Introduce+Sort-Merge+Based+Blocking+Shuffle+to+Flink.]
> shuffle IO scheduling is important for performance. We'd like to Introduce
> it to sort-merge shuffle first.
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