[jira] [Assigned] (SPARK-36423) Randomize blocks within a push request before pushing to improve block merge ratio

2021-08-06 Thread Mridul Muralidharan (Jira)


 [ 
https://issues.apache.org/jira/browse/SPARK-36423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Mridul Muralidharan reassigned SPARK-36423:
---

Assignee: Min Shen

> Randomize blocks within a push request before pushing to improve block merge 
> ratio
> --
>
> Key: SPARK-36423
> URL: https://issues.apache.org/jira/browse/SPARK-36423
> Project: Spark
>  Issue Type: Sub-task
>  Components: Shuffle, Spark Core
>Affects Versions: 3.2.0
>Reporter: Min Shen
>Assignee: Min Shen
>Priority: Major
>
> On the client side, we are currently randomizing the order of push requests 
> before processing each request. In addition we can further randomize the 
> order of blocks within each push request before pushing them.
> In our benchmark, this has resulted in a 60%-70% reduction of blocks that 
> fail to be merged due to bock collision (the existing block merge ratio is 
> already pretty good in general, and this further improves it).



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[jira] [Assigned] (SPARK-36423) Randomize blocks within a push request before pushing to improve block merge ratio

2021-08-05 Thread Apache Spark (Jira)


 [ 
https://issues.apache.org/jira/browse/SPARK-36423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Apache Spark reassigned SPARK-36423:


Assignee: (was: Apache Spark)

> Randomize blocks within a push request before pushing to improve block merge 
> ratio
> --
>
> Key: SPARK-36423
> URL: https://issues.apache.org/jira/browse/SPARK-36423
> Project: Spark
>  Issue Type: Sub-task
>  Components: Shuffle, Spark Core
>Affects Versions: 3.2.0
>Reporter: Min Shen
>Priority: Major
>
> On the client side, we are currently randomizing the order of push requests 
> before processing each request. In addition we can further randomize the 
> order of blocks within each push request before pushing them.
> In our benchmark, this has resulted in a 60%-70% reduction of blocks that 
> fail to be merged due to bock collision (the existing block merge ratio is 
> already pretty good in general, and this further improves it).



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[jira] [Assigned] (SPARK-36423) Randomize blocks within a push request before pushing to improve block merge ratio

2021-08-05 Thread Apache Spark (Jira)


 [ 
https://issues.apache.org/jira/browse/SPARK-36423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Apache Spark reassigned SPARK-36423:


Assignee: Apache Spark

> Randomize blocks within a push request before pushing to improve block merge 
> ratio
> --
>
> Key: SPARK-36423
> URL: https://issues.apache.org/jira/browse/SPARK-36423
> Project: Spark
>  Issue Type: Sub-task
>  Components: Shuffle, Spark Core
>Affects Versions: 3.2.0
>Reporter: Min Shen
>Assignee: Apache Spark
>Priority: Major
>
> On the client side, we are currently randomizing the order of push requests 
> before processing each request. In addition we can further randomize the 
> order of blocks within each push request before pushing them.
> In our benchmark, this has resulted in a 60%-70% reduction of blocks that 
> fail to be merged due to bock collision (the existing block merge ratio is 
> already pretty good in general, and this further improves it).



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