[ https://issues.apache.org/jira/browse/FLINK-15325 ]
Zhu Zhu deleted comment on FLINK-15325:
---------------------------------
was (Author: flink-jira-bot):
This issue was labeled "stale-minor" 7 days ago and has not received any
updates so it is being deprioritized. If this ticket is actually Minor, please
raise the priority and ask a committer to assign you the issue or revive the
public discussion.
> Input location preference which affects task distribution may make certain
> job performance worse
> -------------------------------------------------------------------------------------------------
>
> Key: FLINK-15325
> URL: https://issues.apache.org/jira/browse/FLINK-15325
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Coordination
> Affects Versions: 1.10.0
> Reporter: Zhu Zhu
> Priority: Not a Priority
> Labels: auto-deprioritized-major, auto-deprioritized-minor
> Attachments: D58ADB03-7187-46B1-B077-91E5005FD463.png
>
>
> When running TPC-DS jobs in a session cluster, we observed that sometimes
> tasks are not evenly distributed in TMs. The root cause turned out to be that
> the downstream tasks tend to be TM or host local with its input tasks. This
> helps to reduce network shuffle.
> However, in certain cases, like the topology presented in the attached image,
> jamming the input task's TM and machine with downstream tasks would affect
> the performance. In this case, respecting input location preferences is
> causing troubles more than bringing benefits.
> So I'm wondering whether we should introduce a config so that users can
> disable input location preferences?
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