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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/03/21 02:06:28 UTC
[GitHub] [spark] wangjiaochun commented on issue #24127: [SPARK-27186][CORE]
optimize sortshuffle write
wangjiaochun commented on issue #24127: [SPARK-27186][CORE] optimize sortshuffle write
URL: https://github.com/apache/spark/pull/24127#issuecomment-475091856
The underlying Iterator do nothing.
so I think it's worth revising. first, ExternalSorter-instantiated is expensive operation, such as there is need to
estimate the size of all the collection of the Instances. Also create tmp file is needless.
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