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Posted to issues@spark.apache.org by "Takeshi Yamamuro (JIRA)" <ji...@apache.org> on 2016/03/30 11:38:25 UTC
[jira] [Commented] (SPARK-14259) Add config to control maximum
number of files when coalescing partitions
[ https://issues.apache.org/jira/browse/SPARK-14259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15217732#comment-15217732 ]
Takeshi Yamamuro commented on SPARK-14259:
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Is this an unassigned task? If so, I'll take on this. thanks.
> Add config to control maximum number of files when coalescing partitions
> ------------------------------------------------------------------------
>
> Key: SPARK-14259
> URL: https://issues.apache.org/jira/browse/SPARK-14259
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Nong Li
> Priority: Minor
>
> The FileSourceStrategy currently has a config to control the maximum byte size of coalesced partitions. It is helpful to also have a config to control the maximum number of files as even small files have a non-trivial fixed cost. The current packing can put a lot of small files together which cases straggler tasks.
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