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https://issues.apache.org/jira/browse/SPARK-30474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zaisheng Dai updated SPARK-30474:
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Description:
In the current spark implementation if you set
spark.sql.sources.partitionOverwriteMode=dynamic, even with
mapreduce.fileoutputcommitter.algorithm.version=2, it would still rename the
partition folder *sequentially* in commitJob stage as shown here:
[|https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/internal/io/HadoopMapReduceCommitProtocol.scala#L188]
[https://github.com/apache/spark/blob/branch-2.4/core/src/main/scala/org/apache/spark/internal/io/HadoopMapReduceCommitProtocol.scala#L184]
This is very slow in cloud storage. We should commit the data similar to
FileOutputCommitter v2?
was:
In the current spark implementation if you set
spark.sql.sources.partitionOverwriteMode=dynamic, even with
mapreduce.fileoutputcommitter.algorithm.version=2, it would still rename the
partition folder *sequentially* in commitJob stage as shown here:
[https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/internal/io/HadoopMapReduceCommitProtocol.scala#L188]
This is very slow in cloud storage. We should commit the data similar to
FileOutputCommitter v2?
> Writing data to parquet with dynamic partition should not be done in commit
> job stage
> -------------------------------------------------------------------------------------
>
> Key: SPARK-30474
> URL: https://issues.apache.org/jira/browse/SPARK-30474
> Project: Spark
> Issue Type: Improvement
> Components: Input/Output
> Affects Versions: 2.3.4, 2.4.4
> Reporter: Zaisheng Dai
> Priority: Minor
>
> In the current spark implementation if you set
> spark.sql.sources.partitionOverwriteMode=dynamic, even with
> mapreduce.fileoutputcommitter.algorithm.version=2, it would still rename the
> partition folder *sequentially* in commitJob stage as shown here:
> [|https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/internal/io/HadoopMapReduceCommitProtocol.scala#L188]
>
> [https://github.com/apache/spark/blob/branch-2.4/core/src/main/scala/org/apache/spark/internal/io/HadoopMapReduceCommitProtocol.scala#L184]
>
> This is very slow in cloud storage. We should commit the data similar to
> FileOutputCommitter v2?
>
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