[jira] [Commented] (FLINK-7866) Weigh list of preferred locations for scheduling

["Sihua Zhou (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-7866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16235215#comment-16235215 ] 

Sihua Zhou commented on FLINK-7866:
-----------------------------------

Hi [~till.rohrmann], i saw you have made a PR for [FLINK-7153|https://issues.apache.org/jira/browse/FLINK-7153], can I take this ticket now?

> Weigh list of preferred locations for scheduling
> ------------------------------------------------
>
>                 Key: FLINK-7866
>                 URL: https://issues.apache.org/jira/browse/FLINK-7866
>             Project: Flink
>          Issue Type: Improvement
>          Components: Scheduler
>    Affects Versions: 1.4.0, 1.3.2
>            Reporter: Till Rohrmann
>            Priority: Major
>             Fix For: 1.5.0
>
>
> [~sihuazhou] proposed to not only use the list of preferred locations to decide where to schedule a task, but to also weigh the list according to how often a location appeared and then select the location based on the weight. That way, we would obtain better locality in some cases.
> Example:
> Preferred locations list: {{[location1, location2, location2]}}
> Weighted preferred locations list {{[(location2 , 2), (location1, 1)]}}



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