datasets/comments_2_parquet_part2.py

   1 #!/usr/bin/env python3
   2
   3 # spark script to make sorted, and partitioned parquet files
   4
   5 import pyspark
   6 from pyspark.sql import functions as f
   7 from pyspark.sql import SparkSession
   8
   9 spark = SparkSession.builder.getOrCreate()
  10
  11 conf = pyspark.SparkConf().setAppName("Reddit submissions to parquet")
  12 conf = conf.set("spark.sql.shuffle.partitions",2400)
  13 conf = conf.set('spark.sql.crossJoin.enabled',"true")
  14 conf = conf.set('spark.debug.maxToStringFields',200)
  15 sc = spark.sparkContext
  16
  17 df = spark.read.parquet("/gscratch/comdata/output/temp/reddit_comments.parquet",compression='snappy')
  18
  19 df = df.withColumn("subreddit_2", f.lower(f.col('subreddit')))
  20 df = df.drop('subreddit')
  21 df = df.withColumnRenamed('subreddit_2','subreddit')
  22
  23 df = df.withColumnRenamed("created_utc","CreatedAt")
  24 df = df.withColumn("Month",f.month(f.col("CreatedAt")))
  25 df = df.withColumn("Year",f.year(f.col("CreatedAt")))
  26 df = df.withColumn("Day",f.dayofmonth(f.col("CreatedAt")))
  27
  28 # df = df.repartition(1200,'subreddit')
  29 # df2 = df.sort(["subreddit","CreatedAt","link_id","parent_id","Year","Month","Day"],ascending=True)
  30 # df2 = df2.sortWithinPartitions(["subreddit","CreatedAt","link_id","parent_id","Year","Month","Day"],ascending=True)
  31 # df2.write.parquet("/gscratch/scrubbed/comdata/reddit_comments_by_subreddit.parquet", mode='overwrite', compression='snappy')
  32
  33 #df = spark.read.parquet("/gscratch/scrubbed/comdata/reddit_comments_by_subreddit.parquet")
  34 df = df.repartition(2400,'author','subreddit',"Year","Month","Day")
  35 df3 = df.sort(["author","subreddit","Year","Month","Day","CreatedAt","link_id","parent_id"],ascending=True)
  36 df3 = df3.sortWithinPartitions(["author","subreddit","Year","Month","Day","CreatedAt","link_id","parent_id"],ascending=True)
  37 df3.write.parquet("/gscratch/scrubbed/comdata/reddit_comments_by_author.parquet", mode='overwrite',compression='snappy')