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https://issues.apache.org/jira/browse/FLINK-38323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18018102#comment-18018102
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Gyula Fora commented on FLINK-38323:
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As long as we take the actual slot sharing groups into account I am not against
the feature. But it shouldn't be "global" it should be per slot sharing group
scale factor
> Global Scale Factor Mode
> ------------------------
>
> Key: FLINK-38323
> URL: https://issues.apache.org/jira/browse/FLINK-38323
> Project: Flink
> Issue Type: New Feature
> Components: Autoscaler
> Affects Versions: 1.12.1
> Reporter: Salva
> Priority: Major
> Attachments: TMs - CPU Usage.png
>
>
> As a user, I'd like to have an option to restrict the scaling decisions to
> those altering the number of replicas. This could be achieved by using a
> global scale factor instead of individually adjusting the parallelism of the
> different operators. In this operating mode, the autoscaler would work as
> when one simply adds/removes replicas by hand, which seems to distribute the
> work more evenly in some cases.
> Along these lines, some users have reported running an internal version of
> the autoscaler that ties the whole pipeline (except for the sources/sinks) to
> a global parallelism to avoid uneven task distribution. The change should be
> relatively simple, i.e., just run the algorithm per vertex, and then take the
> maximum parallelism over all the vertices.
> See the question/suggestion first posted
> [here|[https://lists.apache.org/thread/rf9fpr6cjnjjwl6rqhtbhfn380doghyl]].
>
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