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https://issues.apache.org/jira/browse/GOBBLIN-762?focusedWorklogId=236589&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-236589
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ASF GitHub Bot logged work on GOBBLIN-762:
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Author: ASF GitHub Bot
Created on: 02/May/19 22:14
Start Date: 02/May/19 22:14
Worklog Time Spent: 10m
Work Description: htran1 commented on pull request #2626: [GOBBLIN-762]
Add automatic scaling for Gobblin on YARN
URL: https://github.com/apache/incubator-gobblin/pull/2626
Dear Gobblin maintainers,
Please accept this PR. I understand that it will not be reviewed until I
have checked off all the steps below!
### JIRA
- [X] My PR addresses the following [Gobblin
JIRA](https://issues.apache.org/jira/browse/GOBBLIN/) issues and references
them in the PR title. For example, "[GOBBLIN-XXX] My Gobblin PR"
- https://issues.apache.org/jira/browse/GOBBLIN-762
### Description
- [X] Here are some details about my PR, including screenshots (if
applicable):
Added `YarnAutoScalingManager` which can be started by the
`GobblinApplicationMaster` by setting the
`gobblin.yarn.app.master.serviceClasses` configuration. This class runs a
scheduled task with a default interval of 60 seconds to detect the number of
required partitions for the workflows submitted to Helix. It will request the
`YarnService` to scale to a computed number of containers. If the requested
number of containers is higher than the YarnService has previously requested
then it will request more containers. If the requested count is less than the
current number of allocated containers then it will free any unused containers.
### Tests
- [X] My PR adds the following unit tests __OR__ does not need testing for
this extremely good reason:
YarnAutoScalingManagerTest and YarnServiceTest
### Commits
- [X] My commits all reference JIRA issues in their subject lines, and I
have squashed multiple commits if they address the same issue. In addition, my
commits follow the guidelines from "[How to write a good git commit
message](http://chris.beams.io/posts/git-commit/)":
1. Subject is separated from body by a blank line
2. Subject is limited to 50 characters
3. Subject does not end with a period
4. Subject uses the imperative mood ("add", not "adding")
5. Body wraps at 72 characters
6. Body explains "what" and "why", not "how"
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Issue Time Tracking
-------------------
Worklog Id: (was: 236589)
Time Spent: 10m
Remaining Estimate: 0h
> Add automatic scaling for Gobblin on YARN
> -----------------------------------------
>
> Key: GOBBLIN-762
> URL: https://issues.apache.org/jira/browse/GOBBLIN-762
> Project: Apache Gobblin
> Issue Type: Task
> Reporter: Hung Tran
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Gobblin on YARN needs a way to scale up and down the containers based on the
> workload.
> Added `YarnAutoScalingManager` which can be started by the
> `GobblinApplicationMaster` by setting the
> `gobblin.yarn.app.master.serviceClasses` configuration. This class runs a
> scheduled task with a default interval of 60 seconds to detect the number of
> required partitions for the workflows submitted to Helix. It will request the
> `YarnService` to scale to a computed number of containers. If the requested
> number of containers is higher than the YarnService has previously requested
> then it will request more containers. If the requested count is less than the
> current number of allocated containers then it will free any unused
> containers.
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