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Posted to issues@flink.apache.org by "vim (JIRA)" <ji...@apache.org> on 2019/06/21 02:42:00 UTC
[jira] [Updated] (FLINK-12921) Flink Job Scheduling
[ https://issues.apache.org/jira/browse/FLINK-12921?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
vim updated FLINK-12921:
------------------------
Environment:
flink 1.8.0
jdk8
was:
flink 1.7.0
jdk8
> Flink Job Scheduling
> --------------------
>
> Key: FLINK-12921
> URL: https://issues.apache.org/jira/browse/FLINK-12921
> Project: Flink
> Issue Type: Improvement
> Components: API / DataSet, API / DataStream
> Affects Versions: 1.8.0
> Environment: flink 1.8.0
> jdk8
> Reporter: vim
> Priority: Major
>
> This is an example from flink-docs:
> Consider a program with a data source, a _MapFunction_, and a _ReduceFunction_. The source and MapFunction are executed with a parallelism of 4, while the ReduceFunction is executed with a parallelism of 3. A pipeline consists of the sequence Source - Map - Reduce. On a cluster with 2 TaskManagers with 3 slots each, the program will be executed as described below.
> !https://ci.apache.org/projects/flink/flink-docs-release-1.8/fig/slots.svg!
> But after I tried, I found that it was not like this. My result is TaskManager 1 used 3 slot, but TaskManager 2 just used 1 slot. Who else has tested this example?
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