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Arctic Shift Reddit Archive
Every Reddit comment and submission since 2005, organized as monthly Parquet shards
What is it?
The full Reddit archive from Arctic Shift, converted to Parquet and hosted here for easy access. Covers every public subreddit from 2005-12 through 2026-02.
Right now the archive has 1.4B items (124.1M comments, 1.2B submissions) in 161.8 GB of compressed Parquet. Comments and submissions are stored as separate datasets, split into monthly shards you can load individually or stream together.
Reddit has been around since 2005. Millions of people use it to talk about everything - programming, sports, cooking, politics, niche hobbies. That makes it one of the best sources of natural conversation data for language model training, sentiment analysis, community research, and information retrieval. Most Reddit datasets only cover specific subreddits or time windows. This one covers all of it.
What is being released?
Monthly Parquet files, split by type (comments vs submissions). Small months fit in one shard. Large months (post-2015 or so) get split into multiple ~200 MB shards.
data/
comments/
2005/12/000.parquet earliest month with data
2006/01/000.parquet
...
2023/06/000.parquet
001.parquet large months get multiple shards
002.parquet
submissions/
2005/12/000.parquet
2006/01/000.parquet
...
stats.csv one row per committed (month, type) pair
zst_sizes.json .zst file sizes for all months (from torrent metadata)
states.json live pipeline state (updated every ~5 min)
stats.csv tracks every committed (month, type) pair with row count, shard count, Parquet size, original .zst size, processing time, and commit timestamp. zst_sizes.json maps every (type, month) pair to its .zst archive size — useful for estimating remaining work.
Breakdown by type and year
Comments
2005 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 1.1K
2006 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 417.2K
2007 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 2.5M
2008 ████░░░░░░░░░░░░░░░░░░░░░░░░░░ 7.2M
2009 ███████████░░░░░░░░░░░░░░░░░░░ 18.9M
2010 ██████████████████████████████ 48.5M
2011 ████████████████████████████░░ 46.7M
Submissions
2005 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 5.4K
2006 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 304.7K
2007 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 908.2K
2008 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 2.5M
2009 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 4.8M
2010 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 6.9M
2011 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 15.0M
2012 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 29.3M
2013 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 32.3M
2017 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 10.4M
2018 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 11.3M
2019 █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 21.2M
2023 ██░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 39.2M
2024 ████████████████████████████░░ 477.4M
2025 ██████████████████████████████ 494.3M
2026 █████░░░░░░░░░░░░░░░░░░░░░░░░░ 87.5M
How to download and use this dataset
Load comments or submissions separately, filter by year or month, or stream the whole thing. Standard Hugging Face Parquet layout, works with DuckDB, datasets, pandas, and huggingface_hub out of the box.
Using DuckDB
DuckDB reads Parquet directly from Hugging Face - no download step needed.
-- Top 20 subreddits by comment volume (all time)
SELECT subreddit, count(*) AS comments
FROM read_parquet('hf://datasets/open-index/arctic/data/comments/**/*.parquet')
GROUP BY subreddit
ORDER BY comments DESC
LIMIT 20;
-- Monthly submission volume for 2023
SELECT
strftime(created_at, '%Y-%m') AS month,
count(*) AS submissions,
sum(num_comments) AS total_comments
FROM read_parquet('hf://datasets/open-index/arctic/data/submissions/2023/**/*.parquet')
GROUP BY month
ORDER BY month;
-- Most active authors across all comments
SELECT author, count(*) AS comments, avg(score) AS avg_score
FROM read_parquet('hf://datasets/open-index/arctic/data/comments/**/*.parquet')
WHERE author != '[deleted]'
GROUP BY author
ORDER BY comments DESC
LIMIT 20;
-- Average comment length by year
SELECT
extract(year FROM created_at) AS year,
avg(body_length) AS avg_length,
count(*) AS comments
FROM read_parquet('hf://datasets/open-index/arctic/data/comments/**/*.parquet')
GROUP BY year
ORDER BY year;
-- Top linked domains in submissions
SELECT
regexp_extract(url, 'https?://([^/]+)', 1) AS domain,
count(*) AS posts
FROM read_parquet('hf://datasets/open-index/arctic/data/submissions/**/*.parquet')
WHERE url IS NOT NULL AND url != ''
GROUP BY domain
ORDER BY posts DESC
LIMIT 20;
Using datasets
from datasets import load_dataset
# Stream all comments without downloading everything
comments = load_dataset("open-index/arctic", "comments", split="train", streaming=True)
for item in comments:
print(item["author"], item["subreddit"], item["body"][:80])
# Load submissions for a specific year
subs = load_dataset(
"open-index/arctic", "submissions",
data_files="data/submissions/2023/**/*.parquet",
split="train",
)
print(f"{len(subs):,} submissions in 2023")
Using huggingface_hub
from huggingface_hub import snapshot_download
# Download only 2023 comments
snapshot_download(
"open-index/arctic",
repo_type="dataset",
local_dir="./arctic/",
allow_patterns="data/comments/2023/**/*",
)
For faster downloads, install pip install huggingface_hub[hf_transfer] and set HF_HUB_ENABLE_HF_TRANSFER=1.
Using the CLI
# Download a single month of submissions
huggingface-cli download open-index/arctic \
--include "data/submissions/2024/01/*" \
--repo-type dataset --local-dir ./arctic/
Dataset statistics
| Type | Months | Rows | Parquet Size |
|---|---|---|---|
| comments | 67 | 124.1M | 10.4 GB |
| submissions | 125 | 1.2B | 151.5 GB |
| Total | 67 | 1.4B | 161.8 GB |
Coverage
Processing 192 of 486 (month, type) pairs from 2005-12 through 2026-02.
| Metric | Size |
|---|---|
| Total .zst archive | 3.6 TB |
| Processed (.zst) | 472.4 GB |
| Remaining (.zst) | 3.1 TB |
Remaining months (294 pairs)
Click to expand remaining months table
| Month | Type | .zst Size |
|---|---|---|
| 2011-07 | comments | 912.7 MB |
| 2011-08 | comments | 1.0 GB |
| 2011-09 | comments | 1.0 GB |
| 2011-10 | comments | 1.2 GB |
| 2011-11 | comments | 1.2 GB |
| 2011-12 | comments | 1.2 GB |
| 2012-01 | comments | 1.4 GB |
| 2012-02 | comments | 1.4 GB |
| 2012-03 | comments | 1.6 GB |
| 2012-04 | comments | 1.7 GB |
| 2012-05 | comments | 1.8 GB |
| 2012-06 | comments | 1.9 GB |
| 2012-07 | comments | 2.1 GB |
| 2012-08 | comments | 2.2 GB |
| 2012-09 | comments | 2.0 GB |
| 2012-10 | comments | 2.1 GB |
| 2012-11 | comments | 2.1 GB |
| 2012-12 | comments | 2.2 GB |
| 2013-01 | comments | 2.6 GB |
| 2013-02 | comments | 2.4 GB |
| 2013-03 | comments | 2.7 GB |
| 2013-04 | comments | 2.9 GB |
| 2013-05 | comments | 2.9 GB |
| 2013-06 | comments | 2.8 GB |
| 2013-07 | comments | 3.1 GB |
| 2013-08 | comments | 3.1 GB |
| 2013-09 | comments | 2.8 GB |
| 2013-10 | comments | 3.1 GB |
| 2013-11 | comments | 3.2 GB |
| 2013-11 | submissions | 642.3 MB |
| 2013-12 | comments | 3.4 GB |
| 2013-12 | submissions | 687.7 MB |
| 2014-01 | comments | 3.8 GB |
| 2014-01 | submissions | 737.5 MB |
| 2014-02 | comments | 3.5 GB |
| 2014-02 | submissions | 710.5 MB |
| 2014-03 | comments | 3.8 GB |
| 2014-03 | submissions | 759.1 MB |
| 2014-04 | comments | 3.8 GB |
| 2014-04 | submissions | 741.9 MB |
| 2014-05 | comments | 3.9 GB |
| 2014-05 | submissions | 761.9 MB |
| 2014-06 | comments | 3.8 GB |
| 2014-06 | submissions | 751.1 MB |
| 2014-07 | comments | 4.2 GB |
| 2014-07 | submissions | 831.2 MB |
| 2014-08 | comments | 4.2 GB |
| 2014-08 | submissions | 854.4 MB |
| 2014-09 | comments | 4.1 GB |
| 2014-09 | submissions | 853.4 MB |
| 2014-10 | comments | 4.3 GB |
| 2014-10 | submissions | 905.2 MB |
| 2014-11 | comments | 4.2 GB |
| 2014-11 | submissions | 891.1 MB |
| 2014-12 | comments | 4.4 GB |
| 2014-12 | submissions | 946.3 MB |
| 2015-01 | comments | 4.9 GB |
| 2015-01 | submissions | 1.1 GB |
| 2015-02 | comments | 4.5 GB |
| 2015-02 | submissions | 1.1 GB |
| 2015-03 | comments | 5.0 GB |
| 2015-03 | submissions | 1.3 GB |
| 2015-04 | comments | 5.1 GB |
| 2015-04 | submissions | 1.5 GB |
| 2015-05 | comments | 5.1 GB |
| 2015-05 | submissions | 1.6 GB |
| 2015-06 | comments | 5.1 GB |
| 2015-06 | submissions | 1.7 GB |
| 2015-07 | comments | 5.5 GB |
| 2015-07 | submissions | 1.7 GB |
| 2015-08 | comments | 5.1 GB |
| 2015-08 | submissions | 1.7 GB |
| 2015-09 | comments | 4.8 GB |
| 2015-09 | submissions | 1.6 GB |
| 2015-10 | comments | 5.2 GB |
| 2015-10 | submissions | 1.7 GB |
| 2015-11 | comments | 5.0 GB |
| 2015-11 | submissions | 1.6 GB |
| 2015-12 | comments | 5.2 GB |
| 2015-12 | submissions | 1.6 GB |
| 2016-01 | comments | 5.5 GB |
| 2016-01 | submissions | 1.8 GB |
| 2016-02 | comments | 5.3 GB |
| 2016-02 | submissions | 1.8 GB |
| 2016-03 | comments | 5.7 GB |
| 2016-03 | submissions | 1.8 GB |
| 2016-04 | comments | 5.7 GB |
| 2016-04 | submissions | 1.8 GB |
| 2016-05 | comments | 5.8 GB |
| 2016-05 | submissions | 1.9 GB |
| 2016-06 | comments | 5.8 GB |
| 2016-06 | submissions | 1.9 GB |
| 2016-07 | comments | 6.1 GB |
| 2016-07 | submissions | 1.9 GB |
| 2016-08 | comments | 6.2 GB |
| 2016-08 | submissions | 2.0 GB |
| 2016-09 | comments | 5.9 GB |
| 2016-09 | submissions | 2.0 GB |
| 2016-10 | comments | 5.9 GB |
| 2016-10 | submissions | 2.1 GB |
| 2016-11 | comments | 5.9 GB |
| 2016-11 | submissions | 2.3 GB |
| 2016-12 | comments | 6.3 GB |
| 2016-12 | submissions | 2.4 GB |
| 2017-01 | comments | 6.8 GB |
| 2017-01 | submissions | 2.1 GB |
| 2017-02 | comments | 6.2 GB |
| 2017-02 | submissions | 2.0 GB |
| 2017-03 | comments | 7.0 GB |
| 2017-03 | submissions | 2.2 GB |
| 2017-04 | comments | 6.6 GB |
| 2017-04 | submissions | 2.2 GB |
| 2017-05 | comments | 6.0 GB |
| 2017-05 | submissions | 1.9 GB |
| 2017-06 | comments | 6.0 GB |
| 2017-06 | submissions | 2.0 GB |
| 2017-07 | comments | 6.4 GB |
| 2017-07 | submissions | 2.1 GB |
| 2017-08 | comments | 6.5 GB |
| 2017-08 | submissions | 2.2 GB |
| 2017-09 | comments | 6.2 GB |
| 2017-09 | submissions | 2.0 GB |
| 2017-10 | comments | 7.2 GB |
| 2017-10 | submissions | 2.1 GB |
| 2017-11 | comments | 7.2 GB |
| 2017-12 | comments | 7.3 GB |
| 2017-12 | submissions | 2.3 GB |
| 2018-01 | comments | 7.8 GB |
| 2018-02 | comments | 7.4 GB |
| 2018-02 | submissions | 2.3 GB |
| 2018-03 | comments | 8.9 GB |
| 2018-03 | submissions | 2.6 GB |
| 2018-04 | comments | 8.5 GB |
| 2018-04 | submissions | 2.8 GB |
| 2018-05 | comments | 8.8 GB |
| 2018-05 | submissions | 2.9 GB |
| 2018-06 | comments | 8.9 GB |
| 2018-06 | submissions | 2.7 GB |
| 2018-07 | comments | 10.1 GB |
| 2018-07 | submissions | 3.0 GB |
| 2018-08 | comments | 10.1 GB |
| 2018-08 | submissions | 3.1 GB |
| 2018-09 | comments | 9.7 GB |
| 2018-09 | submissions | 3.1 GB |
| 2018-10 | comments | 13.8 GB |
| 2018-10 | submissions | 3.3 GB |
| 2018-11 | comments | 13.2 GB |
| 2018-11 | submissions | 3.4 GB |
| 2018-12 | comments | 11.7 GB |
| 2018-12 | submissions | 3.7 GB |
| 2019-01 | comments | 12.9 GB |
| 2019-01 | submissions | 4.4 GB |
| 2019-02 | comments | 13.1 GB |
| 2019-02 | submissions | 4.2 GB |
| 2019-03 | comments | 13.6 GB |
| 2019-03 | submissions | 5.2 GB |
| 2019-04 | comments | 14.5 GB |
| 2019-04 | submissions | 5.2 GB |
| 2019-05 | comments | 13.7 GB |
| 2019-05 | submissions | 5.4 GB |
| 2019-06 | comments | 14.6 GB |
| 2019-06 | submissions | 5.4 GB |
| 2019-07 | comments | 13.6 GB |
| 2019-07 | submissions | 5.8 GB |
| 2019-08 | comments | 15.6 GB |
| 2019-08 | submissions | 6.1 GB |
| 2019-09 | comments | 15.0 GB |
| 2019-09 | submissions | 5.4 GB |
| 2019-10 | comments | 15.8 GB |
| 2019-10 | submissions | 5.4 GB |
| 2019-11 | comments | 14.8 GB |
| 2019-12 | comments | 15.8 GB |
| 2019-12 | submissions | 6.1 GB |
| 2020-01 | comments | 14.5 GB |
| 2020-01 | submissions | 6.5 GB |
| 2020-02 | comments | 13.9 GB |
| 2020-02 | submissions | 6.4 GB |
| 2020-03 | comments | 15.3 GB |
| 2020-03 | submissions | 7.6 GB |
| 2020-04 | comments | 16.6 GB |
| 2020-04 | submissions | 8.5 GB |
| 2020-05 | comments | 17.9 GB |
| 2020-05 | submissions | 6.6 GB |
| 2020-06 | comments | 17.7 GB |
| 2020-06 | submissions | 6.4 GB |
| 2020-07 | comments | 18.4 GB |
| 2020-07 | submissions | 6.8 GB |
| 2020-08 | comments | 18.4 GB |
| 2020-08 | submissions | 7.1 GB |
| 2020-09 | comments | 17.2 GB |
| 2020-09 | submissions | 6.9 GB |
| 2020-10 | comments | 17.5 GB |
| 2020-10 | submissions | 7.2 GB |
| 2020-11 | comments | 17.2 GB |
| 2020-11 | submissions | 7.1 GB |
| 2020-12 | comments | 17.9 GB |
| 2020-12 | submissions | 7.6 GB |
| 2021-01 | comments | 19.8 GB |
| 2021-01 | submissions | 8.1 GB |
| 2021-02 | comments | 19.7 GB |
| 2021-02 | submissions | 7.8 GB |
| 2021-03 | comments | 21.4 GB |
| 2021-03 | submissions | 8.6 GB |
| 2021-04 | comments | 20.0 GB |
| 2021-04 | submissions | 8.4 GB |
| 2021-05 | comments | 20.9 GB |
| 2021-05 | submissions | 9.1 GB |
| 2021-06 | comments | 20.0 GB |
| 2021-06 | submissions | 8.8 GB |
| 2021-07 | comments | 20.6 GB |
| 2021-07 | submissions | 7.2 GB |
| 2021-08 | comments | 22.1 GB |
| 2021-08 | submissions | 7.3 GB |
| 2021-09 | comments | 21.4 GB |
| 2021-09 | submissions | 6.8 GB |
| 2021-10 | comments | 21.8 GB |
| 2021-10 | submissions | 7.0 GB |
| 2021-11 | comments | 22.1 GB |
| 2021-11 | submissions | 7.1 GB |
| 2021-12 | comments | 22.9 GB |
| 2021-12 | submissions | 7.4 GB |
| 2022-01 | comments | 25.3 GB |
| 2022-01 | submissions | 8.2 GB |
| 2022-02 | comments | 21.4 GB |
| 2022-02 | submissions | 7.8 GB |
| 2022-03 | comments | 23.3 GB |
| 2022-03 | submissions | 8.9 GB |
| 2022-04 | comments | 22.8 GB |
| 2022-04 | submissions | 8.9 GB |
| 2022-05 | comments | 23.0 GB |
| 2022-05 | submissions | 9.6 GB |
| 2022-06 | comments | 22.0 GB |
| 2022-06 | submissions | 9.4 GB |
| 2022-07 | comments | 24.4 GB |
| 2022-07 | submissions | 9.9 GB |
| 2022-08 | comments | 27.0 GB |
| 2022-08 | submissions | 9.7 GB |
| 2022-09 | comments | 23.5 GB |
| 2022-09 | submissions | 9.2 GB |
| 2022-10 | comments | 23.8 GB |
| 2022-10 | submissions | 9.5 GB |
| 2022-11 | comments | 29.3 GB |
| 2022-11 | submissions | 10.5 GB |
| 2022-12 | comments | 30.5 GB |
| 2022-12 | submissions | 11.5 GB |
| 2023-01 | comments | 32.2 GB |
| 2023-01 | submissions | 11.6 GB |
| 2023-02 | comments | 22.7 GB |
| 2023-02 | submissions | 9.3 GB |
| 2023-03 | comments | 24.9 GB |
| 2023-03 | submissions | 10.6 GB |
| 2023-04 | comments | 25.6 GB |
| 2023-04 | submissions | 14.5 GB |
| 2023-05 | comments | 26.3 GB |
| 2023-05 | submissions | 11.0 GB |
| 2023-06 | comments | 25.5 GB |
| 2023-06 | submissions | 13.6 GB |
| 2023-07 | comments | 27.3 GB |
| 2023-07 | submissions | 16.8 GB |
| 2023-08 | comments | 28.9 GB |
| 2023-08 | submissions | 16.7 GB |
| 2023-09 | comments | 28.7 GB |
| 2023-09 | submissions | 15.4 GB |
| 2023-10 | comments | 27.5 GB |
| 2023-10 | submissions | 14.8 GB |
| 2023-11 | comments | 27.1 GB |
| 2023-11 | submissions | 14.5 GB |
| 2023-12 | comments | 27.8 GB |
| 2024-01 | comments | 31.0 GB |
| 2024-02 | comments | 28.9 GB |
| 2024-03 | comments | 30.8 GB |
| 2024-04 | comments | 37.2 GB |
| 2024-05 | comments | 29.5 GB |
| 2024-06 | comments | 29.2 GB |
| 2024-07 | comments | 31.3 GB |
| 2024-08 | comments | 32.3 GB |
| 2024-09 | comments | 31.2 GB |
| 2024-10 | comments | 32.8 GB |
| 2024-11 | comments | 32.3 GB |
| 2024-12 | comments | 32.3 GB |
| 2025-01 | comments | 36.3 GB |
| 2025-02 | comments | 33.2 GB |
| 2025-03 | comments | 35.7 GB |
| 2025-04 | comments | 34.1 GB |
| 2025-05 | comments | 35.8 GB |
| 2025-06 | comments | 35.4 GB |
| 2025-07 | comments | 37.0 GB |
| 2025-08 | comments | 36.5 GB |
| 2025-09 | comments | 35.2 GB |
| 2025-10 | comments | 35.2 GB |
| 2025-11 | comments | 34.1 GB |
| 2025-12 | comments | 35.6 GB |
| 2026-01 | comments | 39.1 GB |
| 2026-02 | comments | 39.6 GB |
Monthly breakdown
Click to expand full monthly table (67 comment months + 125 submission months)
| Month | Type | .zst Size | Download | Process | Upload | Shards | Rows | Parquet |
|---|---|---|---|---|---|---|---|---|
| 2005-12 | comments | 139.8 KB | 36.7s | 1.0s | 17.0s | 1 | 1,075 | 138.4 KB |
| 2005-12 | submissions | 432.7 KB | 1m04s | 1.4s | 8.7s | 1 | 5,356 | 304.3 KB |
| 2006-01 | comments | 394.4 KB | 30.3s | 0.6s | 6.0s | 1 | 3,666 | 388.6 KB |
| 2006-01 | submissions | 642.2 KB | 22.1s | 1.2s | 1m05s | 1 | 8,048 | 458.3 KB |
| 2006-02 | comments | 989.7 KB | 24.3s | 6.2s | 21.0s | 1 | 9,095 | 1021.6 KB |
| 2006-02 | submissions | 758.1 KB | 26.1s | 2.0s | 10.2s | 1 | 9,501 | 560.3 KB |
| 2006-03 | comments | 1.3 MB | 17.6s | 1.1s | 7.4s | 1 | 13,859 | 1.4 MB |
| 2006-03 | submissions | 975.3 KB | 29.4s | 11.9s | 12.0s | 1 | 12,525 | 724.7 KB |
| 2006-04 | comments | 2.0 MB | 30.7s | 2.8s | 15.1s | 1 | 19,090 | 2.1 MB |
| 2006-04 | submissions | 968.5 KB | 25.6s | 3.0s | 17.1s | 1 | 12,556 | 725.4 KB |
| 2006-05 | comments | 2.7 MB | 24.1s | 5.2s | 6.0s | 1 | 26,859 | 2.9 MB |
| 2006-05 | submissions | 1.1 MB | 23.9s | 2.5s | 5.7s | 1 | 14,701 | 850.5 KB |
| 2006-06 | comments | 2.9 MB | 23.4s | 9.1s | 12.1s | 1 | 29,163 | 3.1 MB |
| 2006-06 | submissions | 1.2 MB | 21.9s | 13.3s | 25.1s | 1 | 16,942 | 958.7 KB |
| 2006-07 | comments | 3.6 MB | 29.2s | 10.1s | 17.6s | 1 | 37,031 | 3.8 MB |
| 2006-07 | submissions | 1.8 MB | 25.4s | 8.8s | 9.3s | 1 | 24,026 | 1.3 MB |
| 2006-08 | comments | 4.9 MB | 32.0s | 13.3s | 6.4s | 1 | 50,559 | 5.3 MB |
| 2006-08 | submissions | 2.9 MB | 25.4s | 9.3s | 10.7s | 1 | 40,750 | 2.2 MB |
| 2006-09 | comments | 5.0 MB | 19.1s | 4.8s | 9.7s | 1 | 50,675 | 5.3 MB |
| 2006-09 | submissions | 3.7 MB | 29.3s | 9.5s | 8.9s | 1 | 54,043 | 2.8 MB |
| 2006-10 | comments | 5.0 MB | 26.5s | 10.9s | 14.9s | 1 | 54,148 | 5.3 MB |
| 2006-10 | submissions | 2.9 MB | 28.3s | 15.0s | 25.4s | 1 | 38,333 | 2.2 MB |
| 2006-11 | comments | 5.7 MB | 30.2s | 3.0s | 20.9s | 1 | 62,021 | 6.1 MB |
| 2006-11 | submissions | 2.8 MB | 25.4s | 3.4s | 6.1s | 1 | 36,824 | 2.1 MB |
| 2006-12 | comments | 5.8 MB | 21.7s | 8.1s | 6.7s | 1 | 61,018 | 6.1 MB |
| 2006-12 | submissions | 2.8 MB | 21.3s | 8.6s | 6.5s | 1 | 36,434 | 2.1 MB |
| 2007-01 | comments | 7.7 MB | 24.1s | 7.4s | 29.9s | 1 | 81,341 | 8.3 MB |
| 2007-01 | submissions | 3.4 MB | 23.4s | 8.1s | 10.0s | 1 | 43,725 | 2.5 MB |
| 2007-02 | comments | 8.8 MB | 24.7s | 7.3s | 12.5s | 1 | 95,634 | 9.5 MB |
| 2007-02 | submissions | 3.7 MB | 28.1s | 15.8s | 9.0s | 1 | 47,317 | 2.8 MB |
| 2007-03 | comments | 9.9 MB | 18.1s | 8.5s | 28.0s | 1 | 112,444 | 10.5 MB |
| 2007-03 | submissions | 4.6 MB | 24.8s | 6.5s | 13.6s | 1 | 58,642 | 3.4 MB |
| 2007-04 | comments | 10.9 MB | 21.5s | 9.3s | 17.1s | 1 | 126,773 | 11.6 MB |
| 2007-04 | submissions | 4.8 MB | 22.4s | 8.2s | 17.7s | 1 | 61,544 | 3.6 MB |
| 2007-05 | comments | 14.7 MB | 39.0s | 4.8s | 11.8s | 1 | 170,097 | 15.7 MB |
| 2007-05 | submissions | 5.2 MB | 30.4s | 5.9s | 11.5s | 1 | 65,098 | 3.9 MB |
| 2007-06 | comments | 15.2 MB | 28.7s | 8.5s | 24.6s | 1 | 178,800 | 16.1 MB |
| 2007-06 | submissions | 5.0 MB | 23.1s | 7.8s | 11.1s | 1 | 62,693 | 3.8 MB |
| 2007-07 | comments | 17.5 MB | 23.2s | 14.1s | 15.4s | 1 | 203,319 | 18.6 MB |
| 2007-07 | submissions | 5.8 MB | 23.9s | 12.6s | 12.8s | 1 | 73,248 | 4.4 MB |
| 2007-08 | comments | 18.8 MB | 30.7s | 12.2s | 1m18s | 1 | 225,111 | 19.9 MB |
| 2007-08 | submissions | 6.7 MB | 29.3s | 6.5s | 13.3s | 1 | 84,952 | 5.1 MB |
| 2007-09 | comments | 21.8 MB | 32.2s | 7.5s | 7.7s | 1 | 259,497 | 23.1 MB |
| 2007-09 | submissions | 7.4 MB | 30.2s | 7.3s | 15.8s | 1 | 91,294 | 5.5 MB |
| 2007-10 | comments | 23.2 MB | 25.5s | 8.4s | 17.1s | 1 | 274,170 | 24.5 MB |
| 2007-10 | submissions | 8.0 MB | 29.4s | 16.7s | 15.8s | 1 | 101,633 | 5.9 MB |
| 2007-11 | comments | 28.6 MB | 42.0s | 14.9s | 1m43s | 1 | 372,983 | 27.4 MB |
| 2007-11 | submissions | 8.2 MB | 30.6s | 7.1s | 10.6s | 1 | 106,868 | 5.9 MB |
| 2007-12 | comments | 30.7 MB | 29.9s | 19.0s | 24.9s | 1 | 363,390 | 30.2 MB |
| 2007-12 | submissions | 8.5 MB | 21.6s | 8.6s | 17.0s | 1 | 111,193 | 6.1 MB |
| 2008-01 | comments | 37.6 MB | 34.6s | 12.5s | 38.0s | 1 | 452,990 | 36.7 MB |
| 2008-01 | submissions | 10.9 MB | 26.2s | 7.6s | 19.9s | 1 | 142,310 | 7.8 MB |
| 2008-02 | comments | 36.7 MB | 40.4s | 19.2s | 1m09s | 1 | 441,768 | 35.8 MB |
| 2008-02 | submissions | 11.4 MB | 26.4s | 8.1s | 22.7s | 1 | 147,834 | 8.3 MB |
| 2008-03 | comments | 38.5 MB | 25.0s | 15.1s | 1m13s | 1 | 463,728 | 37.3 MB |
| 2008-03 | submissions | 13.0 MB | 24.9s | 13.6s | 20.6s | 1 | 168,227 | 9.4 MB |
| 2008-04 | comments | 39.5 MB | 32.7s | 16.6s | 1m32s | 1 | 468,317 | 38.5 MB |
| 2008-04 | submissions | 13.0 MB | 28.3s | 7.8s | 25.3s | 1 | 167,472 | 9.4 MB |
| 2008-05 | comments | 45.0 MB | 29.9s | 13.4s | 11.9s | 2 | 536,380 | 43.5 MB |
| 2008-05 | submissions | 13.8 MB | 17.6s | 9.2s | 7.3s | 1 | 177,022 | 10.0 MB |
| 2008-06 | comments | 48.9 MB | - | 17.9s | 7.8s | 2 | 577,684 | 47.4 MB |
| 2008-06 | submissions | 14.9 MB | 34.5s | 9.0s | 11.4s | 1 | 190,682 | 10.8 MB |
| 2008-07 | comments | 50.6 MB | 29.3s | 16.7s | 11.1s | 2 | 592,610 | 49.3 MB |
| 2008-07 | submissions | 17.0 MB | 20.2s | 10.9s | 7.1s | 1 | 218,092 | 12.2 MB |
| 2008-08 | comments | 50.6 MB | - | 23.5s | 7.2s | 2 | 595,959 | 49.1 MB |
| 2008-08 | submissions | 16.7 MB | 32.2s | 11.4s | 26.2s | 1 | 212,552 | 12.0 MB |
| 2008-09 | comments | 57.5 MB | 1m09s | 11.3s | 16.6s | 2 | 680,892 | 56.1 MB |
| 2008-09 | submissions | 20.2 MB | 42.8s | 13.1s | 35.5s | 1 | 256,268 | 14.6 MB |
| 2008-10 | comments | 66.3 MB | - | 20.4s | 28.9s | 2 | 789,874 | 64.2 MB |
| 2008-10 | submissions | 22.6 MB | 34.6s | 11.2s | 6.0s | 1 | 282,974 | 16.3 MB |
| 2008-11 | comments | 65.6 MB | 1m24s | 19.9s | 58.3s | 2 | 792,310 | 63.0 MB |
| 2008-11 | submissions | 21.5 MB | 27.7s | 15.6s | 20.1s | 1 | 272,505 | 15.5 MB |
| 2008-12 | comments | 71.9 MB | - | 33.1s | 41.5s | 2 | 850,359 | 69.8 MB |
| 2008-12 | submissions | 22.3 MB | 22.1s | 13.6s | 15.2s | 1 | 283,915 | 16.0 MB |
| 2009-01 | comments | 88.5 MB | 1m29s | 13.0s | 10.3s | 3 | 1,051,649 | 86.1 MB |
| 2009-01 | submissions | 26.1 MB | 26.3s | 11.6s | 9.3s | 1 | 331,060 | 18.9 MB |
| 2009-02 | comments | 81.1 MB | - | 21.1s | 21.8s | 2 | 944,711 | 78.7 MB |
| 2009-02 | submissions | 26.3 MB | 23.1s | 13.2s | 11.8s | 1 | 329,042 | 19.1 MB |
| 2009-03 | comments | 92.4 MB | 35.6s | 32.8s | 17.9s | 3 | 1,048,643 | 89.8 MB |
| 2009-03 | submissions | 29.2 MB | 24.1s | 17.7s | 17.3s | 1 | 362,805 | 21.4 MB |
| 2009-04 | comments | 95.8 MB | - | 47.6s | 8.7s | 3 | 1,094,599 | 93.2 MB |
| 2009-04 | submissions | 28.8 MB | 39.6s | 17.2s | 7.0s | 1 | 357,107 | 21.3 MB |
| 2009-05 | comments | 107.4 MB | 1m24s | 12.9s | 30.6s | 3 | 1,201,257 | 105.3 MB |
| 2009-05 | submissions | 28.9 MB | 30.5s | 15.2s | 53.4s | 1 | 355,193 | 21.4 MB |
| 2009-06 | comments | 113.5 MB | - | 21.9s | 11.7s | 3 | 1,258,750 | 111.7 MB |
| 2009-06 | submissions | 31.8 MB | 38.8s | 17.0s | 14.8s | 1 | 383,969 | 23.9 MB |
| 2009-07 | comments | 132.4 MB | 53.2s | 36.0s | 16.2s | 3 | 1,470,290 | 129.9 MB |
| 2009-07 | submissions | 37.0 MB | 22.7s | 20.5s | 15.2s | 1 | 427,135 | 28.4 MB |
| 2009-08 | comments | 157.2 MB | - | 23.4s | 15.4s | 4 | 1,750,688 | 153.3 MB |
| 2009-08 | submissions | 38.9 MB | 1m01s | 21.4s | 17.1s | 1 | 435,860 | 30.3 MB |
| 2009-09 | comments | 179.5 MB | 1m15s | 55.7s | 3m02s | 5 | 2,032,276 | 172.6 MB |
| 2009-09 | submissions | 40.2 MB | 24.9s | 21.3s | 14.7s | 1 | 443,037 | 31.7 MB |
| 2009-10 | comments | 204.4 MB | 1m18s | 29.3s | 1m49s | 5 | 2,242,017 | 199.1 MB |
| 2009-10 | submissions | 42.5 MB | 1m17s | 24.4s | 39.7s | 1 | 461,702 | 33.7 MB |
| 2009-11 | comments | 198.5 MB | - | 1m03s | 57.1s | 5 | 2,207,444 | 193.5 MB |
| 2009-11 | submissions | 41.4 MB | 33.3s | 20.9s | 31.1s | 1 | 452,320 | 32.8 MB |
| 2009-12 | comments | 226.6 MB | 1m38s | 1m26s | 25.9s | 6 | 2,560,510 | 220.7 MB |
| 2009-12 | submissions | 45.4 MB | 26.7s | 12.1s | 25.4s | 1 | 492,225 | 36.3 MB |
| 2010-01 | comments | 256.2 MB | - | 49.6s | 29.6s | 6 | 2,884,096 | 249.4 MB |
| 2010-01 | submissions | 51.1 MB | 1m02s | 34.1s | 6.9s | 2 | 549,007 | 40.9 MB |
| 2010-02 | comments | 241.7 MB | 1m35s | 46.4s | 43.4s | 6 | 2,687,779 | 237.5 MB |
| 2010-02 | submissions | 47.6 MB | - | 58.9s | 9.7s | 2 | 506,868 | 38.2 MB |
| 2010-03 | comments | 288.1 MB | - | 48.8s | 1m37s | 7 | 3,228,254 | 281.1 MB |
| 2010-03 | submissions | 57.4 MB | 1m16s | 31.6s | 13.2s | 2 | 602,586 | 46.2 MB |
| 2010-04 | comments | 284.0 MB | 1m40s | 50.7s | 1m02s | 7 | 3,209,898 | 274.8 MB |
| 2010-04 | submissions | 58.4 MB | - | 1m11s | 14.2s | 2 | 617,302 | 46.8 MB |
| 2010-05 | comments | 286.2 MB | - | 1m14s | 29.6s | 7 | 3,267,363 | 278.5 MB |
| 2010-05 | submissions | 51.4 MB | 56.2s | 1m08s | 10.2s | 2 | 515,637 | 41.6 MB |
| 2010-06 | comments | 308.7 MB | 2m06s | 41.9s | 1m09s | 8 | 3,532,867 | 298.9 MB |
| 2010-06 | submissions | 49.3 MB | 26.9s | 19.7s | 1m34s | 1 | 478,396 | 40.0 MB |
| 2010-07 | comments | 357.5 MB | - | 2m51s | 31.1s | 9 | 4,032,737 | 346.6 MB |
| 2010-07 | submissions | 53.7 MB | 1m15s | 1m58s | 6.9s | 2 | 504,098 | 44.2 MB |
| 2010-08 | comments | 374.3 MB | 4m02s | 3m19s | 43.9s | 9 | 4,247,982 | 364.2 MB |
| 2010-08 | submissions | 57.4 MB | - | 3m48s | 15.2s | 2 | 537,480 | 46.9 MB |
| 2010-09 | comments | 414.9 MB | - | 5m44s | 3m40s | 10 | 4,704,069 | 400.0 MB |
| 2010-09 | submissions | 65.5 MB | 1m55s | 48.3s | 17.7s | 2 | 600,209 | 53.7 MB |
| 2010-10 | comments | 447.8 MB | 5m59s | 5m52s | 12.3s | 11 | 5,032,368 | 433.8 MB |
| 2010-10 | submissions | 69.9 MB | - | 52.3s | 11.6s | 2 | 630,298 | 57.6 MB |
| 2010-11 | comments | 506.2 MB | - | 14m01s | 3m50s | 12 | 5,689,002 | 487.7 MB |
| 2010-11 | submissions | 76.6 MB | - | 8m41s | 32.5s | 2 | 674,615 | 63.6 MB |
| 2010-12 | comments | 531.7 MB | 4m22s | 11m24s | 6m30s | 12 | 5,972,642 | 513.1 MB |
| 2010-12 | submissions | 83.3 MB | 59.3s | 15.1s | 8m13s | 2 | 729,840 | 69.3 MB |
| 2011-01 | comments | 592.8 MB | - | 12m14s | 3m28s | 14 | 6,603,329 | 570.4 MB |
| 2011-01 | submissions | 117.9 MB | - | 12m30s | 1m51s | 2 | 837,996 | 91.1 MB |
| 2011-02 | comments | 574.2 MB | - | 13m35s | 1m57s | 13 | 6,363,114 | 551.3 MB |
| 2011-02 | submissions | 114.1 MB | - | 13m58s | 33.6s | 2 | 822,302 | 88.3 MB |
| 2011-03 | comments | 679.7 MB | 6m36s | 18m04s | 2m59s | 16 | 7,556,165 | 652.4 MB |
| 2011-03 | submissions | 135.5 MB | 2m44s | 18m30s | 8m51s | 2 | 976,817 | 104.4 MB |
| 2011-04 | comments | 665.1 MB | 2m35s | 13m05s | - | 16 | 7,571,398 | 633.9 MB |
| 2011-04 | submissions | 132.9 MB | 1m29s | 21.3s | 2m41s | 2 | 971,371 | 101.6 MB |
| 2011-05 | comments | 772.0 MB | - | 17m50s | 4m29s | 18 | 8,803,949 | 733.7 MB |
| 2011-05 | submissions | 144.9 MB | - | 18m18s | 2m55s | 3 | 1,081,578 | 111.9 MB |
| 2011-06 | comments | 854.3 MB | - | 22m19s | 11m36s | 20 | 9,766,511 | 816.4 MB |
| 2011-06 | submissions | 155.2 MB | - | 22m30s | - | 3 | 1,153,048 | 121.0 MB |
| 2011-07 | submissions | 172.1 MB | 1m31s | 20.4s | 2m49s | 3 | 1,264,991 | 134.2 MB |
| 2011-08 | submissions | 199.9 MB | - | 44.2s | 1m08s | 3 | 1,448,347 | 156.5 MB |
| 2011-09 | submissions | 204.2 MB | 2m13s | 1m34s | 37.2s | 3 | 1,482,575 | 160.2 MB |
| 2011-10 | submissions | 226.9 MB | - | 54.4s | 1m17s | 4 | 1,590,673 | 179.1 MB |
| 2011-11 | submissions | 235.5 MB | 2m18s | 57.4s | 1m06s | 4 | 1,634,431 | 181.8 MB |
| 2011-12 | submissions | 252.0 MB | - | 2m56s | 1m21s | 4 | 1,772,219 | 194.2 MB |
| 2012-01 | submissions | 285.4 MB | 2m04s | 5m37s | 2m09s | 4 | 1,981,577 | 217.7 MB |
| 2012-02 | submissions | 288.4 MB | 1m14s | 9m08s | 1m10s | 4 | 1,961,817 | 221.3 MB |
| 2012-03 | submissions | 315.1 MB | 1m51s | 14m38s | 44.8s | 5 | 2,158,965 | 240.0 MB |
| 2012-04 | submissions | 333.9 MB | 1m31s | 7m36s | 1m35s | 5 | 2,279,491 | 253.9 MB |
| 2012-05 | submissions | 348.5 MB | 1m41s | 9m32s | 1m22s | 5 | 2,293,901 | 273.1 MB |
| 2012-06 | submissions | 365.1 MB | - | 8m13s | 1m37s | 5 | 2,393,973 | 285.7 MB |
| 2012-07 | submissions | 402.5 MB | 1m34s | 25m03s | 1m48s | 6 | 2,663,529 | 313.2 MB |
| 2012-08 | submissions | 425.4 MB | 1m09s | 13m10s | 1m26s | 6 | 2,782,752 | 332.2 MB |
| 2012-09 | submissions | 419.9 MB | 2m48s | 11m14s | 1m38s | 6 | 2,568,109 | 305.8 MB |
| 2012-10 | submissions | 446.3 MB | 3m10s | 24m04s | 1m05s | 6 | 2,776,156 | 321.5 MB |
| 2012-11 | submissions | 441.6 MB | 4m37s | 24m13s | 2m12s | 6 | 2,706,118 | 321.5 MB |
| 2012-12 | submissions | 444.0 MB | 1m17s | 13m35s | 1m27s | 6 | 2,735,743 | 324.8 MB |
| 2013-01 | submissions | 522.7 MB | 8m49s | 28m60s | 2m57s | 7 | 3,134,862 | 371.4 MB |
| 2013-02 | submissions | 476.8 MB | 3m38s | 16m45s | 1m13s | 6 | 2,886,631 | 346.7 MB |
| 2013-03 | submissions | 534.8 MB | 2m12s | 19m46s | 2m06s | 7 | 3,201,525 | 392.5 MB |
| 2013-04 | submissions | 563.0 MB | 3m41s | 38m37s | 3m16s | 7 | 3,376,188 | 412.2 MB |
| 2013-05 | submissions | 551.8 MB | 5m18s | 48m28s | 2m29s | 7 | 3,261,976 | 411.0 MB |
| 2013-06 | submissions | 550.7 MB | 2m44s | 23m23s | 2m04s | 7 | 3,189,490 | 413.1 MB |
| 2013-07 | submissions | 590.7 MB | 3m32s | 46m19s | 3m05s | 7 | 3,374,406 | 442.8 MB |
| 2013-08 | submissions | 586.6 MB | 1m40s | 26m37s | 3m26s | 7 | 3,315,090 | 443.7 MB |
| 2013-09 | submissions | 561.6 MB | 6m10s | 50m41s | 2m27s | 7 | 3,121,163 | 416.4 MB |
| 2013-10 | submissions | 620.1 MB | 2m10s | 29m42s | 2m24s | 7 | 3,467,225 | 457.2 MB |
| 2017-11 | submissions | 2.2 GB | 8m23s | 79m11s | 2m55s | 21 | 10,377,379 | 1.3 GB |
| 2018-01 | submissions | 2.4 GB | 8m56s | 94m49s | 3m14s | 23 | 11,306,843 | 1.4 GB |
| 2019-11 | submissions | 5.5 GB | 9m48s | 26m01s | 5m27s | 43 | 21,243,315 | 2.2 GB |
| 2023-12 | submissions | 15.2 GB | 30m19s | 76m33s | 26m24s | 79 | 39,245,797 | 4.4 GB |
| 2024-01 | submissions | 16.1 GB | 183m48s | 126m12s | 21m25s | 83 | 41,263,034 | 4.7 GB |
| 2024-02 | submissions | 15.2 GB | 111m14s | 119m06s | 23m35s | 79 | 39,030,731 | 4.4 GB |
| 2024-03 | submissions | 16.0 GB | 65m44s | 116m50s | 34m36s | 84 | 41,926,097 | 4.8 GB |
| 2024-04 | submissions | 17.4 GB | 23m13s | 25m48s | 31m31s | 82 | 40,701,692 | 4.7 GB |
| 2024-05 | submissions | 15.3 GB | 20m14s | 104m42s | 29m22s | 80 | 39,877,545 | 4.7 GB |
| 2024-06 | submissions | 15.0 GB | 32m22s | 92m02s | 19m44s | 77 | 38,423,968 | 4.6 GB |
| 2024-07 | submissions | 15.9 GB | 24m49s | 116m01s | 13m17s | 82 | 40,924,291 | 4.8 GB |
| 2024-08 | submissions | 16.2 GB | 163m07s | 104m37s | 70m51s | 83 | 41,477,291 | 4.9 GB |
| 2024-09 | submissions | 15.0 GB | 33m40s | 91m13s | 28m16s | 78 | 38,596,941 | 4.7 GB |
| 2024-10 | submissions | 15.5 GB | 31m32s | 100m29s | 32m47s | 78 | 38,986,522 | 4.8 GB |
| 2024-11 | submissions | 15.1 GB | 46m44s | 108m24s | 33m44s | 77 | 38,022,413 | 4.7 GB |
| 2024-12 | submissions | 15.4 GB | 25m12s | 82m18s | 25m24s | 77 | 38,188,278 | 4.8 GB |
| 2025-01 | submissions | 16.2 GB | 59m52s | 73m59s | 23m14s | 80 | 39,905,721 | 5.1 GB |
| 2025-02 | submissions | 14.8 GB | 35m36s | 64m07s | 14m40s | 73 | 36,173,238 | 4.7 GB |
| 2025-03 | submissions | 16.3 GB | 56m39s | 77m30s | 15m47s | 80 | 39,637,989 | 5.2 GB |
| 2025-04 | submissions | 16.1 GB | 58m07s | 79m49s | 31m40s | 78 | 38,776,405 | 5.2 GB |
| 2025-05 | submissions | 17.2 GB | 86m13s | 91m27s | 47m45s | 82 | 40,563,699 | 5.4 GB |
| 2025-06 | submissions | 17.2 GB | 45m47s | 82m33s | 50m14s | 81 | 40,417,850 | 5.4 GB |
| 2025-07 | submissions | 17.3 GB | 46m29s | 82m56s | 53m20s | 86 | 42,900,690 | 5.8 GB |
| 2025-08 | submissions | 17.5 GB | 32m24s | 91m24s | 29m09s | 89 | 44,170,194 | 5.8 GB |
| 2025-09 | submissions | 16.7 GB | 35m21s | 87m53s | 37m53s | 85 | 42,368,178 | 5.4 GB |
| 2025-10 | submissions | 17.0 GB | 27m11s | 79m60s | 12m49s | 88 | 43,919,437 | 5.5 GB |
| 2025-11 | submissions | 16.7 GB | 36m19s | 84m30s | 13m47s | 86 | 42,567,338 | 5.3 GB |
| 2025-12 | submissions | 17.0 GB | 33m58s | 90m19s | 25m17s | 86 | 42,861,083 | 5.5 GB |
| 2026-01 | submissions | 18.3 GB | 48m04s | 98m58s | 49m17s | 93 | 46,094,846 | 5.9 GB |
| 2026-02 | submissions | 16.6 GB | 35m02s | 84m21s | 17m25s | 83 | 41,434,105 | 5.3 GB |
Query per-month stats directly:
SELECT year, month, type, shards, count, size_bytes
FROM read_csv_auto('hf://datasets/open-index/arctic/stats.csv')
ORDER BY year, month, type;
stats.csv columns:
| Column | Description |
|---|---|
year, month |
Calendar month |
type |
comments or submissions |
shards |
Number of Parquet files for this (month, type) |
count |
Total rows across all shards |
size_bytes |
Total Parquet size across all shards |
zst_bytes |
Original .zst source file size (from torrent metadata) |
dur_download_s |
Seconds to download the .zst source |
dur_process_s |
Seconds to decompress and convert to Parquet |
dur_commit_s |
Seconds to commit to Hugging Face |
committed_at |
ISO 8601 timestamp when this pair was committed |
Pipeline Status
Pipelined ingestion running on vmi3112167 (6 cores, 12 GB RAM, 99 GB free). Auto-updated every ~5 minutes.
Started: 2026-03-24 16:15 UTC / Elapsed: 30m / Committed this session: 0
Active Workers
| Stage | Month | Type | Progress |
|---|---|---|---|
| Downloading | 2011-11 | comments | 300.6 MB / 1.2 GB (25%) |
| Processing | 2011-07 | comments | shard 18 · 9.0M rows · 73.6K rows/s |
| Processing | 2011-08 | comments | starting... |
Throughput
| Metric | Value |
|---|---|
| Download | 22 Mbps avg |
Progress
███████████░░░░░░░░░░░░░░░░░░░ 192 / 488 (39.3%)
| Metric | This Session |
|---|---|
| Months committed | 0 |
| Rows processed | 0 |
| Data committed | 0 B |
Last update: 2026-03-24 16:45 UTC
Dataset card for Arctic Shift Reddit Archive
Dataset summary
A repackaging of the Arctic Shift monthly Reddit dumps into Parquet. Arctic Shift re-processes the PushShift Reddit archive, which captured most public Reddit content from the early days through the 2023 API changes.
Covers every public subreddit, every month, both comments and submissions. Built for research, analysis, and training. People use it for:
- Language model pretraining and fine-tuning - one of the largest sources of natural conversation on the internet
- Sentiment and trend analysis - two decades of public opinion on just about everything
- Community research - thousands of subreddits, each with its own culture and moderation norms
- Information retrieval - real questions and answers from r/AskReddit, r/explainlikeimfive, and others
- Content moderation research - moderation signals are preserved in the data
Dataset structure
Data instances
Example comment:
{
"id": "c0001",
"author": "spez",
"subreddit": "reddit.com",
"body": "Welcome to Reddit!",
"score": 42,
"created_utc": 1134028003,
"created_at": "2005-12-08T10:06:43",
"body_length": 19,
"link_id": "t3_17",
"parent_id": "t3_17",
"distinguished": null,
"author_flair_text": null
}
Example submission:
{
"id": "abc123",
"author": "kn0thing",
"subreddit": "reddit.com",
"title": "The Downing Street Memo",
"selftext": "",
"score": 15,
"created_utc": 1118895720,
"created_at": "2005-06-16T01:02:00",
"title_length": 23,
"num_comments": 3,
"url": "http://www.timesonline.co.uk/...",
"over_18": false,
"link_flair_text": null,
"author_flair_text": null
}
Data fields
Comments (data/comments/YYYY/MM/NNN.parquet)
| Column | Type | Description |
|---|---|---|
id |
VARCHAR | Reddit's base-36 comment ID |
author |
VARCHAR | Username. [deleted] if account was removed |
subreddit |
VARCHAR | Subreddit name (no r/ prefix) |
body |
VARCHAR | Comment text in Markdown |
score |
BIGINT | Net upvotes at time of archival |
created_utc |
BIGINT | Unix timestamp |
created_at |
TIMESTAMP | Derived from created_utc |
body_length |
BIGINT | Character count of body |
link_id |
VARCHAR | Parent submission ID (t3_... format) |
parent_id |
VARCHAR | Parent comment or submission ID |
distinguished |
VARCHAR | moderator, admin, or null |
author_flair_text |
VARCHAR | Author's flair in this subreddit |
Submissions (data/submissions/YYYY/MM/NNN.parquet)
| Column | Type | Description |
|---|---|---|
id |
VARCHAR | Reddit's base-36 submission ID |
author |
VARCHAR | Username of the poster |
subreddit |
VARCHAR | Subreddit name |
title |
VARCHAR | Post title |
selftext |
VARCHAR | Post body for text posts (empty for link posts) |
score |
BIGINT | Net upvotes at time of archival |
created_utc |
BIGINT | Unix timestamp |
created_at |
TIMESTAMP | Derived from created_utc |
title_length |
BIGINT | Character count of title |
num_comments |
BIGINT | Comment count on this post |
url |
VARCHAR | External URL for link posts, permalink for text posts |
over_18 |
BOOLEAN | NSFW flag |
link_flair_text |
VARCHAR | Post flair text |
author_flair_text |
VARCHAR | Author's flair |
Data splits
Two named configs: comments and submissions. Each loads all monthly shards as a single train split.
You can also load specific years or months with data_files:
# Load just January 2020 comments
ds = load_dataset("open-index/arctic", data_files="data/comments/2020/01/*.parquet", split="train")
# Load all 2023 submissions
ds = load_dataset("open-index/arctic", data_files="data/submissions/2023/**/*.parquet", split="train")
Dataset creation
Why we built this
Reddit is one of the best sources of real human conversation on the internet, but getting at the full archive got a lot harder after Reddit locked down API access in 2023. The Arctic Shift project preserves the data as monthly .zst JSONL dumps. We convert those dumps to Parquet on Hugging Face so you can query with DuckDB, stream with datasets, or bulk download without any special tooling.
Source data
Everything comes from Arctic Shift torrent archives, which re-process the PushShift Reddit dumps. Source format is .zst-compressed JSONL, one JSON object per line.
- 2005-12 through 2023-12: From the Arctic Shift bundle torrent
- 2024-01 onward: Individual monthly torrents from Arctic Shift
Processing steps
The pipeline is written in Go and uses DuckDB for the Parquet conversion. For each (month, type) pair:
- Download the .zst via BitTorrent with selective file priority (only the needed file from the bundle, not the whole archive)
- Stream through a klauspost/compress zstd decoder with a 2 GB window
- Chunk the JSONL into ~2 million line batches, writing each to a temp file
- Convert each chunk to Parquet with DuckDB
read_json_auto, explicit column selection,TRY_CAST, Zstandard compression, 131K-row row groups - Delete each temp chunk right after the shard is written (disk is tight)
- Commit all shards plus updated
stats.csvandREADME.mdto Hugging Face - Clean up local shards after the commit goes through
The pipeline picks up where it left off - stats.csv tracks what has been committed, and those pairs get skipped on restart. Disk usage stays minimal: at most one .zst, one JSONL chunk, and the current month's shards on disk at a time.
No filtering, deduplication, or content changes. The data matches the Arctic Shift dumps exactly. All Parquet files use Zstandard compression.
Personal and sensitive information
Usernames and user-generated text are included as they appeared publicly on Reddit. Deleted accounts show as [deleted], deleted content as [removed].
No PII scrubbing has been done. At this scale, the dataset almost certainly contains personal information that people posted publicly. If you find something that should be removed, open a discussion on the Community tab.
Considerations for using the data
Social impact
Making the full Reddit archive accessible in a standard format should help researchers study how online communities work, how language changes over time, and how one of the internet's biggest platforms has shaped public discourse.
Biases
Reddit skews young, male, English-speaking, and North American/European. Subreddits vary wildly in culture, moderation, and toxicity. The voting system amplifies what each community already agrees with.
We did not filter, score, or assess the data in any way. Controversial, toxic, and NSFW content is all in there. Apply your own filtering for your use case.
Known limitations
- Completeness depends on PushShift. PushShift missed some content, especially in the earliest months and during ingestion outages.
- Scores are snapshots. The
scorefield is whatever PushShift captured at the time, not the final score. - Deleted content. Posts deleted before PushShift got to them are gone. Posts deleted after capture may still have the original text.
- No user profiles. Just posts and comments. No karma, no account metadata.
- Markdown and HTML. Comment bodies use Reddit's Markdown variant. Some old content has raw HTML.
Additional information
Licensing
Reddit content is subject to Reddit's Terms of Service. Arctic Shift distributes the archive under permissive research terms. This repackaging is provided as-is for research and education.
Not affiliated with or endorsed by Reddit, Inc. or Arctic Shift.
Thanks
All the data here comes from Arctic Shift, which preserves and distributes the PushShift Reddit archive through Academic Torrents. None of this would be practical without their work.
Contact
Questions, feedback, or issues - open a discussion on the Community tab.
Last updated: 2026-03-24 16:45 UTC
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