Publish 2 shards CC-MAIN-2026-08/00595–01337
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00595.parquet +3 -0
- data/CC-MAIN-2026-08/01337.parquet +3 -0
- stats.csv +4 -2
README.md
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Open Index is a large-scale web text dataset built from [Common Crawl](https://commoncrawl.org). Every page goes through a pipeline that extracts the main content from raw HTML, converts it to clean Markdown using [trafilatura](https://github.com/adbar/trafilatura), and packages the result into Parquet files with full WARC metadata preserved.
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The dataset currently includes crawl **CC-MAIN-2026-08** with **25,
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Open Index is released under the **Open Data Commons Attribution License (ODC-By) v1.0**, the same license used by Common Crawl.
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### Compression Ratios
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Numbers below are actual measurements summed across all
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| Stage |
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| Raw WARC (.warc.gz, downloaded) | ~1.1 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 3.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~55.
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| Final Parquet (Zstd level 19) | 37.
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The big win is the HTML → Markdown step: trafilatura strips all tags, scripts, styles, navigation, and ads, keeping only the main content. This cuts 3.1 TB of uncompressed HTML down to 117.
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End to end: ~1.1 TB of raw gzipped WARCs becomes **37.
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### Processing Times
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Pipeline timings across
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```
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Download (raw WARC) ████████████████████████ total 103h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 25h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 8h 16m
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```
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### Dataset Charts
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Open Index is a large-scale web text dataset built from [Common Crawl](https://commoncrawl.org). Every page goes through a pipeline that extracts the main content from raw HTML, converts it to clean Markdown using [trafilatura](https://github.com/adbar/trafilatura), and packages the result into Parquet files with full WARC metadata preserved.
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The dataset currently includes crawl **CC-MAIN-2026-08** with **25,986,659 documents across 1344 shards**. We plan to add more snapshots over time.
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Open Index is released under the **Open Data Commons Attribution License (ODC-By) v1.0**, the same license used by Common Crawl.
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### Compression Ratios
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Numbers below are actual measurements summed across all 1344 files of CC-MAIN-2026-08 (25,986,659 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1344 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~1.1 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 3.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~55.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 37.2 GB | ~2.9 TB | **-32.5%** vs packed WARC |
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The big win is the HTML → Markdown step: trafilatura strips all tags, scripts, styles, navigation, and ads, keeping only the main content. This cuts 3.1 TB of uncompressed HTML down to 117.2 GB of markdown — a **98.3% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 68.3%.
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End to end: ~1.1 TB of raw gzipped WARCs becomes **37.2 GB of Parquet** — a **96.6% total reduction** — containing 25,986,659 clean markdown documents.
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### Processing Times
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Pipeline timings across 1344 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 103h 52m 11s avg 4m 38s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 31m 40s avg 20s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 25h 34m 19s avg 1m 8s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 8h 16m 35s avg 22s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00595.parquet
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data/CC-MAIN-2026-08/01337.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:3b11776aa9559773c8631d591bb5b68ac7b73af43f7fc4b280351479338cdd90
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size 30001998
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stats.csv
CHANGED
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@@ -501,6 +501,7 @@ CC-MAIN-2026-08,591,19537,2561813555,95325642,29831248,2026-03-14T02:59:36Z,0,34
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@@ -746,7 +747,7 @@ CC-MAIN-2026-08,1062,19471,2575193105,94036307,29228618,2026-03-14T02:55:44Z,474
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