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https://issues.apache.org/jira/browse/SPARK-1239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14989638#comment-14989638
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Alex Slusarenko commented on SPARK-1239:
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> How is this not a major issue for everyone?
Daniel, I had exactly the same thoughts, but I found out that most of Spark
users have small data. Most users need about 10 servers. I was even more
surprised when I had to fix SPARK-6246 myself. Spark was not able to launch
more than 100 instances on Amazon.
> Don't fetch all map output statuses at each reducer during shuffles
> -------------------------------------------------------------------
>
> Key: SPARK-1239
> URL: https://issues.apache.org/jira/browse/SPARK-1239
> Project: Spark
> Issue Type: Improvement
> Components: Shuffle, Spark Core
> Affects Versions: 1.0.2, 1.1.0
> Reporter: Patrick Wendell
>
> Instead we should modify the way we fetch map output statuses to take both a
> mapper and a reducer - or we should just piggyback the statuses on each task.
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