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From "godfrey he (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (FLINK-5342) Setting the parallelism automatically for operators base on cost model
Date Mon, 19 Dec 2016 03:32:58 GMT

    [ https://issues.apache.org/jira/browse/FLINK-5342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15759971#comment-15759971
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godfrey he edited comment on FLINK-5342 at 12/19/16 3:32 AM:
-------------------------------------------------------------

at present, we can use TableConfig to tune the parallelism of key operators which include
shuffle operator (aggregator, sort, join, union), source operator and sink operator. And flink
optimizer should ensure that other operators should be chained as possible.


was (Author: godfreyhe):
at present, we can use TableConfig to tune the parallelism of key operators which include
shuffle operator (aggregator, sort, join, union), source operator and sink operator.

> Setting the parallelism automatically for operators base on cost model
> ----------------------------------------------------------------------
>
>                 Key: FLINK-5342
>                 URL: https://issues.apache.org/jira/browse/FLINK-5342
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API & SQL
>            Reporter: godfrey he
>
> On Flink table API, a query will be translated to operators without parallelism. And
user do not know even do not care the target operators translated from query. So it's better
to set the parallelism automatically for each operator base on cost model.



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