[jira] [Commented] (SPARK-28945) Allow concurrent writes to unrelated partitions with dynamic partition overwrite

["koert kuipers (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-28945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16920602#comment-16920602 ] 

koert kuipers commented on SPARK-28945:
---------------------------------------

See also:
https://mail-archives.apache.org/mod_mbox/spark-dev/201909.mbox/%3CCANx3uAinvf2LdtKfWUsykCJ%2BkHh6oYy0Pt_5LvcTSURGmQKQwg%40mail.gmail.com%3E

> Allow concurrent writes to unrelated partitions with dynamic partition overwrite
> --------------------------------------------------------------------------------
>
>                 Key: SPARK-28945
>                 URL: https://issues.apache.org/jira/browse/SPARK-28945
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.4.3
>            Reporter: koert kuipers
>            Priority: Minor
>
> It is desirable to run concurrent jobs that write to different partitions within same baseDir using partitionBy and dynamic partitionOverwriteMode.
> See for example here:
> https://stackoverflow.com/questions/38964736/multiple-spark-jobs-appending-parquet-data-to-same-base-path-with-partitioning
> Or the discussion here:
> https://github.com/delta-io/delta/issues/9
> This doesnt seem that difficult. I suspect only changes needed are in org.apache.spark.internal.io.HadoopMapReduceCommitProtocol, which already has a flag for dynamicPartitionOverwrite. I got a quick test to work by disabling all committer activity (committer.setupJob, committer.commitJob, etc.) when dynamicPartitionOverwrite is true. 



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