collective/cdsc_reddit
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Move the spark part of submissions_2_parquet to a separate script.

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This commit is contained in:
Nate E TeBlunthuis 2020-07-06 22:26:29 -07:00
parent 4eb82d2740
commit 4ec9c14247
2 changed files with 44 additions and 37 deletions
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39
submissions_2_parquet.py → submissions_2_parquet_part1.py
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@ -1,8 +1,8 @@
#!/usr/bin/env python3
# two stages:
# 1. from gz to arrow parquet
# 2. from arrow parquet to spark parquet
# 1. from gz to arrow parquet (this script)
# 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")

42
submissions_2_parquet_part2.py Normal file
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@ -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")