X-Git-Url: https://code.communitydata.science/cdsc_reddit.git/blobdiff_plain/40d45637702fb51feb9f99ff7f6d71787af765ed..a60747292e91a47d122158659182f82bfd2e922a:/submissions_2_parquet_part1.py diff --git a/submissions_2_parquet_part1.py b/submissions_2_parquet_part1.py index 131391b..16d1988 100755 --- a/submissions_2_parquet_part1.py +++ b/submissions_2_parquet_part1.py @@ -4,7 +4,6 @@ # 1. from gz to arrow parquet (this script) # 2. from arrow parquet to spark parquet (submissions_2_parquet_part2.py) -import json from datetime import datetime from multiprocessing import Pool from itertools import islice @@ -12,19 +11,23 @@ from helper import find_dumps, open_fileset import pandas as pd import pyarrow as pa import pyarrow.parquet as pq +import simdjson +import fire +import os +parser = simdjson.Parser() def parse_submission(post, names = None): if names is None: - names = ['id','author','subreddit','title','created_utc','permalink','url','domain','score','ups','downs','over_18','has_media','selftext','retrieved_on','num_comments','gilded','edited','time_edited','subreddit_type','subreddit_id','subreddit_subscribers','name','is_self','stickied','is_submitter','quarantine','error'] + names = ['id','author','subreddit','title','created_utc','permalink','url','domain','score','ups','downs','over_18','has_media','selftext','retrieved_on','num_comments','gilded','edited','time_edited','subreddit_type','subreddit_id','subreddit_subscribers','name','is_self','stickied','quarantine','error'] try: - post = json.loads(post) - except (json.decoder.JSONDecodeError, UnicodeDecodeError) as e: + post = parser.parse(post) + except (ValueError) as e: # print(e) # print(post) row = [None for _ in names] - row[-1] = "json.decoder.JSONDecodeError|{0}|{1}".format(e,post) + row[-1] = "Error parsing json|{0}|{1}".format(e,post) return tuple(row) row = [] @@ -55,56 +58,61 @@ def parse_submission(post, names = None): row.append(post[name]) return tuple(row) -dumpdir = "/gscratch/comdata/raw_data/reddit_dumps/submissions" - -files = list(find_dumps(dumpdir)) - -pool = Pool(28) - -stream = open_fileset(files) - -N = 100000 - -rows = pool.imap_unordered(parse_submission, stream, chunksize=int(N/28)) - -schema = pa.schema([ - pa.field('id', pa.string(),nullable=True), - pa.field('author', pa.string(),nullable=True), - pa.field('subreddit', pa.string(),nullable=True), - pa.field('title', pa.string(),nullable=True), - pa.field('created_utc', pa.timestamp('ms'),nullable=True), - pa.field('permalink', pa.string(),nullable=True), - pa.field('url', pa.string(),nullable=True), - pa.field('domain', pa.string(),nullable=True), - pa.field('score', pa.int64(),nullable=True), - pa.field('ups', pa.int64(),nullable=True), - pa.field('downs', pa.int64(),nullable=True), - pa.field('over_18', pa.bool_(),nullable=True), - pa.field('has_media',pa.bool_(),nullable=True), - pa.field('selftext',pa.string(),nullable=True), - pa.field('retrieved_on', pa.timestamp('ms'),nullable=True), - pa.field('num_comments', pa.int64(),nullable=True), - pa.field('gilded',pa.int64(),nullable=True), - pa.field('edited',pa.bool_(),nullable=True), - pa.field('time_edited',pa.timestamp('ms'),nullable=True), - pa.field('subreddit_type',pa.string(),nullable=True), - pa.field('subreddit_id',pa.string(),nullable=True), - pa.field('subreddit_subscribers',pa.int64(),nullable=True), - pa.field('name',pa.string(),nullable=True), - pa.field('is_self',pa.bool_(),nullable=True), - pa.field('stickied',pa.bool_(),nullable=True), - pa.field('is_submitter',pa.bool_(),nullable=True), - pa.field('quarantine',pa.bool_(),nullable=True), - pa.field('error',pa.string(),nullable=True)]) - -with pq.ParquetWriter("/gscratch/comdata/output/reddit_submissions.parquet_temp",schema=schema,compression='snappy',flavor='spark') as writer: - while True: - chunk = islice(rows,N) - pddf = pd.DataFrame(chunk, columns=schema.names) - table = pa.Table.from_pandas(pddf,schema=schema) - if table.shape[0] == 0: - break - writer.write_table(table) - - writer.close() - +def parse_dump(partition): + + N=10000 + stream = open_fileset([f"/gscratch/comdata/raw_data/reddit_dumps/submissions/{partition}"]) + rows = map(parse_submission,stream) + schema = pa.schema([ + pa.field('id', pa.string(),nullable=True), + pa.field('author', pa.string(),nullable=True), + pa.field('subreddit', pa.string(),nullable=True), + pa.field('title', pa.string(),nullable=True), + pa.field('created_utc', pa.timestamp('ms'),nullable=True), + pa.field('permalink', pa.string(),nullable=True), + pa.field('url', pa.string(),nullable=True), + pa.field('domain', pa.string(),nullable=True), + pa.field('score', pa.int64(),nullable=True), + pa.field('ups', pa.int64(),nullable=True), + pa.field('downs', pa.int64(),nullable=True), + pa.field('over_18', pa.bool_(),nullable=True), + pa.field('has_media',pa.bool_(),nullable=True), + pa.field('selftext',pa.string(),nullable=True), + pa.field('retrieved_on', pa.timestamp('ms'),nullable=True), + pa.field('num_comments', pa.int64(),nullable=True), + pa.field('gilded',pa.int64(),nullable=True), + pa.field('edited',pa.bool_(),nullable=True), + pa.field('time_edited',pa.timestamp('ms'),nullable=True), + pa.field('subreddit_type',pa.string(),nullable=True), + pa.field('subreddit_id',pa.string(),nullable=True), + pa.field('subreddit_subscribers',pa.int64(),nullable=True), + pa.field('name',pa.string(),nullable=True), + pa.field('is_self',pa.bool_(),nullable=True), + pa.field('stickied',pa.bool_(),nullable=True), + pa.field('quarantine',pa.bool_(),nullable=True), + pa.field('error',pa.string(),nullable=True)]) + + if not os.path.exists("/gscratch/comdata/output/temp/reddit_submissions.parquet/"): + os.mkdir("/gscratch/comdata/output/temp/reddit_submissions.parquet/") + + with pq.ParquetWriter(f"/gscratch/comdata/output/temp/reddit_submissions.parquet/{partition}",schema=schema,compression='snappy',flavor='spark') as writer: + while True: + chunk = islice(rows,N) + pddf = pd.DataFrame(chunk, columns=schema.names) + table = pa.Table.from_pandas(pddf,schema=schema) + if table.shape[0] == 0: + break + writer.write_table(table) + + writer.close() + +def gen_task_list(dumpdir="/gscratch/comdata/raw_data/reddit_dumps/submissions"): + files = list(find_dumps(dumpdir,base_pattern="RS_20*.*")) + with open("parse_submissions_task_list",'w') as of: + for fpath in files: + partition = os.path.split(fpath)[1] + of.write(f'python3 submissions_2_parquet_part1.py parse_dump {partition}\n') + +if __name__ == "__main__": + fire.Fire({'parse_dump':parse_dump, + 'gen_task_list':gen_task_list})