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Shuffling 1 point possible ( graded ) Which of the following are true about the shuffle operation in Spark? You are encouraged to read more
Shuffling
point possible graded
Which of the following are true about the shuffle operation in Spark?
You are encouraged to read more about shuffle here.
All Spark operations involve shuffling
Shuffling requires large amounts of network communication which makes the operation expensive
Shuffling is Spark's mechanism for redistributing data across partitions
To avoid shuffling, we should think about ways to leverage existing partitions. For example, leveraging
partial aggregation to reduce data transfer
No communication between worker nodes is required for the shuffling operation
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