homework.md

Spark Fundamentals Week

• match_details
  • a row for every players performance in a match
• matches
  • a row for every match
• medals_matches_players
  • a row for every medal type a player gets in a match
• medals
  • a row for every medal type

Your goal is to make the following things happen:

• Build a Spark job that
  • Disabled automatic broadcast join with spark.conf.set("spark.sql.autoBroadcastJoinThreshold", "-1")
  • Explicitly broadcast JOINs medals and maps
  • Bucket join match_details, matches, and medal_matches_players on match_id with 16 buckets
  • Aggregate the joined data frame to figure out questions like:
    • Which player averages the most kills per game?
    • Which playlist gets played the most?
    • Which map gets played the most?
    • Which map do players get the most Killing Spree medals on?
  • With the aggregated data set
    • Try different .sortWithinPartitions to see which has the smallest data size (hint: playlists and maps are both very low cardinality)

Save these as .py files and submit them this way!