Move the spark part of submissions_2_parquet to a separate script.

submissions_2_parquet_part1.py

@@ -1,8 +1,8 @@
 #!/usr/bin/env python3
 
 # two stages:
-# 1. from gz to arrow parquet
+# 1. from gz to arrow parquet (this script) 
-# 2. from arrow parquet to spark parquet
+# 2. from arrow parquet to spark parquet (submissions_2_parquet_part2.py)
 
 from collections import defaultdict
 from os import path
@@ -170,38 +170,3 @@ with  pq.ParquetWriter("/gscratch/comdata/output/reddit_submissions.parquet_temp
 
     writer.close()
 
-import pyspark
-from pyspark.sql import functions as f
-from pyspark.sql.types import *
-from pyspark import SparkConf, SparkContext
-from pyspark.sql import SparkSession, SQLContext
-
-spark = SparkSession.builder.getOrCreate()
-sc = spark.sparkContext
-
-conf = SparkConf().setAppName("Reddit submissions to parquet")
-conf = conf.set('spark.sql.crossJoin.enabled',"true")
-
-sqlContext = pyspark.SQLContext(sc)
-
-df = spark.read.parquet("/gscratch/comdata/output/reddit_submissions.parquet_temp")
-
-df = df.withColumn("subreddit_2", f.lower(f.col('subreddit')))
-df = df.drop('subreddit')
-df = df.withColumnRenamed('subreddit_2','subreddit')
-df = df.withColumnRenamed("created_utc","CreatedAt")
-df = df.withColumn("Month",f.month(f.col("CreatedAt")))
-df = df.withColumn("Year",f.year(f.col("CreatedAt")))
-df = df.withColumn("Day",f.dayofmonth(f.col("CreatedAt")))
-df = df.withColumn("subreddit_hash",f.sha2(f.col("subreddit"), 256)[0:3])
-
-# next we gotta resort it all.
-df2 = df.sort(["subreddit","author","id","Year","Month","Day"],ascending=True)
-df2.write.parquet("/gscratch/comdata/output/reddit_submissions_by_subreddit.parquet", partitionBy=["Year",'Month'], mode='overwrite')
-
-
-# we also want to have parquet files sorted by author then reddit. 
-df3 = df.sort(["author","CreatedAt","subreddit","id","Year","Month","Day"],ascending=True)
-df3.write.parquet("/gscratch/comdata/output/reddit_submissions_by_author.parquet", partitionBy=["Year",'Month'], mode='overwrite')
-
-os.remove("/gscratch/comdata/output/reddit_submissions.parquet_temp")

submissions_2_parquet_part2.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+
+# spark script to make sorted, and partitioned parquet files 
+
+import pyspark
+from pyspark.sql import functions as f
+from pyspark.sql.types import *
+from pyspark import SparkConf, SparkContext
+from pyspark.sql import SparkSession, SQLContext
+import os
+
+spark = SparkSession.builder.getOrCreate()
+
+sc = spark.sparkContext
+
+conf = SparkConf().setAppName("Reddit submissions to parquet")
+conf = conf.set("spark.sql.shuffle.partitions",2000)
+conf = conf.set('spark.sql.crossJoin.enabled',"true")
+conf = conf.set('spark.debug.maxToStringFields',200)
+sqlContext = pyspark.SQLContext(sc)
+
+df = spark.read.parquet("/gscratch/comdata/output/reddit_submissions.parquet_temp")
+
+df = df.withColumn("subreddit_2", f.lower(f.col('subreddit')))
+df = df.drop('subreddit')
+df = df.withColumnRenamed('subreddit_2','subreddit')
+df = df.withColumnRenamed("created_utc","CreatedAt")
+df = df.withColumn("Month",f.month(f.col("CreatedAt")))
+df = df.withColumn("Year",f.year(f.col("CreatedAt")))
+df = df.withColumn("Day",f.dayofmonth(f.col("CreatedAt")))
+df = df.withColumn("subreddit_hash",f.sha2(f.col("subreddit"), 256)[0:3])
+
+# next we gotta resort it all.
+df2 = df.sort(["subreddit","author","id","Year","Month","Day"],ascending=True)
+df2.write.parquet("/gscratch/comdata/output/reddit_submissions_by_subreddit.parquet", partitionBy=["Year",'Month'], mode='overwrite')
+
+
+# # we also want to have parquet files sorted by author then reddit. 
+df3 = df.sort(["author","CreatedAt","subreddit","id","Year","Month","Day"],ascending=True)
+df3.write.parquet("/gscratch/comdata/output/reddit_submissions_by_author.parquet", partitionBy=["Year",'Month'], mode='overwrite')
+
+os.remove("/gscratch/comdata/output/reddit_submissions.parquet_temp")