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Big data & Spark

PySpark jobs, partitioning, batch processing, and large-dataset transform patterns.

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Skew Join Salting Key in Python (Demo)

Demonstrates skew join salting by expanding a smaller side with salt keys and matching rows on the larger side via random salt assignment.

skew join salting distributed
Python 
import random


def skew_join_salting_key(left_df, right_df, salt_range=4):
    """
    Demonstrates skew join salting: expand the smaller side with salt keys,
    then attach a salt key to each row on the larger side.
    Returns a list of (left, right, salt) tuples.
    """
    skewed_left = []
    for row in left_d…
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