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From "Takeshi Yamamuro (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-15247) sqlCtx.read.parquet yields at least n_executors * n_cores tasks
Date Thu, 12 May 2016 07:16:12 GMT

    [ https://issues.apache.org/jira/browse/SPARK-15247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15281270#comment-15281270
] 

Takeshi Yamamuro commented on SPARK-15247:
------------------------------------------

Ah, yes. I got you. I try to look into this.

> sqlCtx.read.parquet yields at least n_executors * n_cores tasks
> ---------------------------------------------------------------
>
>                 Key: SPARK-15247
>                 URL: https://issues.apache.org/jira/browse/SPARK-15247
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.6.0
>            Reporter: Johnny W.
>
> sqlCtx.read.parquet always yields at least n_executors * n_cores tasks, even though this
is only 1 very small file
> This issue can increase the latency for small jobs.



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