[
https://issues.apache.org/jira/browse/SPARK-37357?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
XiDuo You updated SPARK-37357:
------------------------------
Summary: Add merged last partition factor for rebalance (was: Add merged
last partition factor for split skew partition)
> Add merged last partition factor for rebalance
> ----------------------------------------------
>
> Key: SPARK-37357
> URL: https://issues.apache.org/jira/browse/SPARK-37357
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.3.0
> Reporter: XiDuo You
> Priority: Major
>
> For example `Rebalance` provide a functionality that split the large reduce
> partition into smalls. However we have seen many SQL produce small files due
> to the last partition.
> Let's say we have one reduce partition and three map partitions and the
> blocks are: [10, 10, 10, 10, 10, 10] and the target size is 50. We will get
> two files with 50 and 10. And it will get worse if there are thousands of
> reduce partitions.
> It should be helpful if we can merge the last small partition into previous.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
