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https://issues.apache.org/jira/browse/FLINK-10506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16783453#comment-16783453
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Till Rohrmann commented on FLINK-10506:
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Hi [~yanghua], this is a bit of tricky issue because we have to maintain the
{{JobGraphs}} backwards compatibility and hence should be careful when adding
new fields. Therefore, I would suggest to not start working on this issue. Or
at least we should have a very detailed plan how to solve this issue.
> Introduce minimum, target and maximum parallelism to JobGraph
> -------------------------------------------------------------
>
> Key: FLINK-10506
> URL: https://issues.apache.org/jira/browse/FLINK-10506
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Coordination
> Affects Versions: 1.7.0
> Reporter: Till Rohrmann
> Assignee: vinoyang
> Priority: Major
> Fix For: 1.8.0
>
>
> In order to run a job with a variable parallelism, one needs to be able to
> define the minimum and maximum parallelism for an operator as well as the
> current target value. In the first implementation, minimum could be 1 and
> maximum the max parallelism of the operator if no explicit parallelism has
> been specified for an operator. If a parallelism p has been specified (via
> setParallelism(p)), then minimum = maximum = p. The target value could be the
> command line parameter -p or the default parallelism.
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