DataYatri
Spark, seen under the hood
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Educational simulation
Shuffle Simulator
Watch keys hash to reducers.
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Step
1
of 4
1. Map output
2. Hash the key
3. Network transfer
4. Reducers
Map-side partitions
P0 · A,C
250 MB
P1 · B,A
240 MB
P2 · D,C
250 MB
P3 · B,D
240 MB