题目内容
(请给出正确答案)
[多选题]
下列哪些Hadoop涉及Shuffle的参数是作用于map端的?()
A.io.sort.mb
B.mapred.compress.map.output
C.mapred.map.output.compression.codec
D.io.sort.spill.percent
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A.io.sort.mb
B.mapred.compress.map.output
C.mapred.map.output.compression.codec
D.io.sort.spill.percent
A.shuffle
B.partitionAggregate
C.partitionBy
D.projection
What is learned about Shuffle?
A.They have excellent customer service.
B.They make very good medium use shredders.
C.Their products sell for more than others.
D.They make more shredders than most companies.