Publish shard CC-MAIN-2026-08/00171
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/00171.parquet +3 -0
- stats.csv +3 -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 **15,
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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) | 1.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~33.
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| Final Parquet (Zstd level 19) | 22.4 GB | ~2.9 TB | **-32.4%** 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 1.9 TB of uncompressed HTML down to 70.
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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 46h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 3h 1m 14s avg 13s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 10h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 57m
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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 **15,649,701 documents across 809 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 809 files of CC-MAIN-2026-08 (15,649,701 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 809 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~655.7 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~33.2 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 22.4 GB | ~2.9 TB | **-32.4%** 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 1.9 TB of uncompressed HTML down to 70.6 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 68.2%.
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End to end: ~655.7 GB of raw gzipped WARCs becomes **22.4 GB of Parquet** — a **96.6% total reduction** — containing 15,649,701 clean markdown documents.
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### Processing Times
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Pipeline timings across 809 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 46h 24m 58s avg 3m 26s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 3h 1m 14s avg 13s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 10h 5m 48s avg 44s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 57m 58s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00171.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:20de5e24149a9916b94d8088d130419cdd4230c840483ac0c4ddcb81dd84a909
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size 30216223
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stats.csv
CHANGED
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@@ -171,6 +171,7 @@ CC-MAIN-2026-08,167,19479,2608667162,97765916,30323458,2026-03-13T16:28:01Z,199,
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CC-MAIN-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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