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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2019/05/21 05:35:39 UTC

[jira] [Updated] (SPARK-5372) Change the default storage level of window operators

     [ https://issues.apache.org/jira/browse/SPARK-5372?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon updated SPARK-5372:
--------------------------------
    Labels: bulk-closed  (was: )

> Change the default storage level of window operators
> ----------------------------------------------------
>
>                 Key: SPARK-5372
>                 URL: https://issues.apache.org/jira/browse/SPARK-5372
>             Project: Spark
>          Issue Type: Task
>          Components: DStreams
>    Affects Versions: 1.2.0
>            Reporter: Saisai Shao
>            Priority: Minor
>              Labels: bulk-closed
>
> Current storage level of window operators is MEMORY_ONLY_SER, if the memory is not enough to hold all the window data, cached RDD will be discarded, which will lead to unexpected behavior. 
> Besides the default storage level of input data is MEMORY_AND_DISK_SER_2, it is better to align to this storage level to change the storage level of window operators to MEMORY_AND_DISK_SER.
> This changing has no effect when memory is enough. So I'd propose to change the default storage level to MEMORY_AND_DISK_SER.



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