[jira] [Commented] (FLINK-31936) Support setting scale up max factor

[Gyula Fora (Jira)]

[ 
https://issues.apache.org/jira/browse/FLINK-31936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17716271#comment-17716271
 ] 

Gyula Fora commented on FLINK-31936:


Thanks [~Zhanghao Chen] , I assign this to you :) 

> Support setting scale up max factor
> ---
>
> Key: FLINK-31936
> URL: https://issues.apache.org/jira/browse/FLINK-31936
> Project: Flink
>  Issue Type: Improvement
>  Components: Autoscaler
>Reporter: Zhanghao Chen
>Priority: Major
>
> Currently, only scale down max factor is supported to be configured. We 
> should also add a config for scale up max factor as well. In many cases, a 
> job's performance won't improve after scaling up due to external bottlenecks. 
> Although we can detect ineffective scaling up and would block further 
> scaling, but it already hurts if we scale too much in a single step which may 
> even burn out external services.
> As for the default value, I think 200% would be a good start.



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[jira] [Commented] (FLINK-31936) Support setting scale up max factor

[Zhanghao Chen (Jira)]

[ 
https://issues.apache.org/jira/browse/FLINK-31936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17716235#comment-17716235
 ] 

Zhanghao Chen commented on FLINK-31936:
---

Hi, [~gyfora], if you think this issue is worthful to do, could you assign it 
to me? I'm trying to use autoscaling in production, and would like to 
contribute to autoscaler as well. Hope this could be the starting point of my 
contribution.

> Support setting scale up max factor
> ---
>
> Key: FLINK-31936
> URL: https://issues.apache.org/jira/browse/FLINK-31936
> Project: Flink
>  Issue Type: Improvement
>  Components: Autoscaler
>Reporter: Zhanghao Chen
>Priority: Major
>
> Currently, only scale down max factor is supported to be configured. We 
> should also add a config for scale up max factor as well. In many cases, a 
> job's performance won't improve after scaling up due to external bottlenecks. 
> Although we can detect ineffective scaling up would block further scaling, 
> but it already hurts if we scale too much in a single step which may even 
> burn out external services.
> As for the default value, I think 200% would be a good start.



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