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https://issues.apache.org/jira/browse/BEAM-5713?focusedWorklogId=154317&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-154317
]
ASF GitHub Bot logged work on BEAM-5713:
----------------------------------------
Author: ASF GitHub Bot
Created on: 15/Oct/18 14:14
Start Date: 15/Oct/18 14:14
Worklog Time Spent: 10m
Work Description: mxm commented on issue #6654: [BEAM-5713] Make
ImpulseSourceFunction execute in parallel
URL: https://github.com/apache/beam/pull/6654#issuecomment-429869253
I believe the execution graph should look something like this:
```
ParDo
/
Impulse -> ParDo -> Reshuffle |- ParDo
\
ParDo
```
The first ParDo does the initial source creation and assigns work items, the
following ParDos process these in parallel.
That looks a lot more complicated than just having a source but moving
forward with SplittableDoFn this will be the new way.
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Issue Time Tracking
-------------------
Worklog Id: (was: 154317)
Time Spent: 1h 20m (was: 1h 10m)
> Flink portable runner schedules all tasks of streaming job on same task
> manager
> -------------------------------------------------------------------------------
>
> Key: BEAM-5713
> URL: https://issues.apache.org/jira/browse/BEAM-5713
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Affects Versions: 2.8.0
> Reporter: Thomas Weise
> Assignee: Maximilian Michels
> Priority: Major
> Labels: portability, portability-flink
> Attachments: Different SlotSharingGroup.png, With
> RichParallelSourceFunction and parallelism 5.png,
> image-2018-10-11-11-43-50-333.png, image-2018-10-11-16-20-45-221.png
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> The cluster has 9 task managers and 144 task slots total. A simple streaming
> pipeline with parallelism of 8 will get all tasks scheduled on the same task
> manager, causing the host to be fully booked and the remaining cluster idle.
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