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https://issues.apache.org/jira/browse/SPARK-8008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14570450#comment-14570450
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Reynold Xin edited comment on SPARK-8008 at 6/3/15 8:08 AM:
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[~rtreffer] can you submit a patch to the jdbc data source write to throttle
there using your union hack?
I think it's easy to throttle write, but pretty hard to throttle reads in all
places.
was (Author: rxin):
[~rtreffer] can you submit a patch to the jdbc data source write to throttle
there using your union hack?
> JDBC data source can overload the external database system due to high
> concurrency
> ----------------------------------------------------------------------------------
>
> Key: SPARK-8008
> URL: https://issues.apache.org/jira/browse/SPARK-8008
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Rene Treffer
>
> Spark tries to load as many partitions as possible in parallel, which can in
> turn overload the database although it would be possible to load all
> partitions given a lower concurrency.
> It would be nice to either limit the maximum concurrency or to at least warn
> about this behavior.
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