[jira] [Commented] (HELIX-674) Constraint Based Resource Rebalancer

[ASF GitHub Bot (JIRA)]

[ 
https://issues.apache.org/jira/browse/HELIX-674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16377882#comment-16377882
 ] 

ASF GitHub Bot commented on HELIX-674:
--

GitHub user jiajunwang opened a pull request:

https://github.com/apache/helix/pull/137

[HELIX-674] Introducing constraints based rebalancing mechanism.

Constraint can be customized by application to restrict how rebalancing is 
processed.
The change also includes examples to demonstrate how constraints can be 
defined and used.

You can merge this pull request into a Git repository by running:

$ git pull https://github.com/jiajunwang/helix master

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/helix/pull/137.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

This closes #137


commit 84052d7acf316619bd284a88b9074aa446548565
Author: jiajunwang 
Date:   2018-02-27T01:21:48Z

Introducing constraints based rebalancing mechanism.

Constraint can be customized by application to restrict how rebalancing is 
processed.
The change also includes examples to demonstrate how constraints can be 
defined and used.




> Constraint Based Resource Rebalancer
> 
>
> Key: HELIX-674
> URL: https://issues.apache.org/jira/browse/HELIX-674
> Project: Apache Helix
>  Issue Type: New Feature
>Reporter: Jiajun Wang
>Assignee: Jiajun Wang
>Priority: Major
> Fix For: 0.8.x
>
>
> Helix rebalancer assigns resources according to different strategies. 
> Recently, we optimize the strategy for evenness and minimize movement. 
> However, the evenness here only applies to partition numbers. Moreover, we've 
> got more requests for customizable rebalancer from our users.
> Take partition weight as an example:
> In reality, partition replicas have different size. We use "partition weight" 
> as an abstraction of the partition size. It can be network traffic usage, 
> disk usage, or any other combined factors.
> Given each partition may have different weights, Helix should be able to 
> assign partition accordingly. So that the distribution would be even 
> regarding the weight.
> In this project, we are planning new rebalancer mechanism that generates 
> resource partition assignment according to a list of "constraints". Current 
> rebalance strategy can be regarded as one kind of constraint. Moving forward, 
> Helix users would be able to extend the constraint interface using their own 
> logic.
> Some init discussions are in progress and we will have a proposal posted here 
> soon.



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[GitHub] helix pull request #137: [HELIX-674] Introducing constraints based rebalanci...

[jiajunwang]

GitHub user jiajunwang opened a pull request:

https://github.com/apache/helix/pull/137

[HELIX-674] Introducing constraints based rebalancing mechanism.

Constraint can be customized by application to restrict how rebalancing is 
processed.
The change also includes examples to demonstrate how constraints can be 
defined and used.

You can merge this pull request into a Git repository by running:

$ git pull https://github.com/jiajunwang/helix master

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/helix/pull/137.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

This closes #137


commit 84052d7acf316619bd284a88b9074aa446548565
Author: jiajunwang 
Date:   2018-02-27T01:21:48Z

Introducing constraints based rebalancing mechanism.

Constraint can be customized by application to restrict how rebalancing is 
processed.
The change also includes examples to demonstrate how constraints can be 
defined and used.




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