Publish 3 shards CC-MAIN-2026-08/00213–01298
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00213.parquet +3 -0
- data/CC-MAIN-2026-08/00374.parquet +3 -0
- data/CC-MAIN-2026-08/01298.parquet +3 -0
- stats.csv +5 -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 **22,
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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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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~
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| HTML extracted (uncompressed) | 2.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~47.
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| Final Parquet (Zstd level 19) | 31.
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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 2.7 TB of uncompressed HTML down to 100.
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End to end: ~
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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
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 25m
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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 **22,213,310 documents across 1150 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 1150 files of CC-MAIN-2026-08 (22,213,310 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1150 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~932.1 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~47.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 31.8 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 2.7 TB of uncompressed HTML down to 100.2 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: ~932.1 GB of raw gzipped WARCs becomes **31.8 GB of Parquet** — a **96.6% total reduction** — containing 22,213,310 clean markdown documents.
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### Processing Times
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Pipeline timings across 1150 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 87h 19m 4s avg 4m 33s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 21h 9m 3s avg 1m 6s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 25m 56s avg 23s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00213.parquet
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data/CC-MAIN-2026-08/00374.parquet
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data/CC-MAIN-2026-08/01298.parquet
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version https://git-lfs.github.com/spec/v1
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size 29574710
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stats.csv
CHANGED
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@@ -213,6 +213,7 @@ CC-MAIN-2026-08,209,19477,2556452554,94323140,29724815,2026-03-14T01:06:44Z,772,
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@@ -337,6 +338,7 @@ CC-MAIN-2026-08,370,19242,2559224128,97323871,31587291,2026-03-14T01:14:04Z,750,
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