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https://issues.apache.org/jira/browse/FLINK-4459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15439239#comment-15439239
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ASF GitHub Bot commented on FLINK-4459:
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GitHub user KurtYoung opened a pull request:
https://github.com/apache/flink/pull/2424
[FLINK-4459][Scheduler] Introduce SlotProvider for Scheduler
Introduce SlotProvider, prepare for the further slot allocation refactoring
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/KurtYoung/flink flink-4459
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/2424.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2424
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commit b88f024e6c6b134d00588af6aab8c03a189d2d3a
Author: Kurt Young <ykt...@gmail.com>
Date: 2016-08-26T09:51:40Z
[FLINK-4459][Scheduler] Introduce SlotProvider for Scheduler
----
> Introduce SlotProvider for Scheduler
> ------------------------------------
>
> Key: FLINK-4459
> URL: https://issues.apache.org/jira/browse/FLINK-4459
> Project: Flink
> Issue Type: Improvement
> Components: Scheduler
> Reporter: Till Rohrmann
> Assignee: Kurt Young
>
> Currently the {{Scheduler}} maintains a queue of available instances which it
> scans if it needs a new slot. If it finds a suitable instance (having free
> slots available) it will allocate a slot from it.
> This slot allocation logic can be factored out and be made available via a
> {{SlotProvider}} interface. The {{SlotProvider}} has methods to allocate a
> slot given a set of location preferences. Slots should be returned as
> {{Futures}}, because in the future the slot allocation might happen
> asynchronously (Flip-6).
> In the first version, the {{SlotProvider}} implementation will simply
> encapsulate the existing slot allocation logic extracted from the
> {{Scheduler}}. When a slot is requested it will return a completed or failed
> future since the allocation happens synchronously.
> The refactoring will have the advantage to simplify the {{Scheduler}} class
> and to pave the way for upcoming refactorings (Flip-6).
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