Publish shard CC-MAIN-2026-08/02155
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/02155.parquet +3 -0
- stats.csv +2 -1
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 **14,
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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) | ~
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| HTML extracted (uncompressed) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~31.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.3 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 1.8 TB of uncompressed HTML down to 67.
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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 43h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 45m
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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 **14,870,358 documents across 769 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 769 files of CC-MAIN-2026-08 (14,870,358 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 769 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~623.3 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~31.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.3 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 1.8 TB of uncompressed HTML down to 67.1 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: ~623.3 GB of raw gzipped WARCs becomes **21.3 GB of Parquet** — a **96.6% total reduction** — containing 14,870,358 clean markdown documents.
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### Processing Times
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Pipeline timings across 769 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 43h 17m 30s avg 3m 22s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h 17m 12s avg 43s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 45m 23s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/02155.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:a30e6310bf9189bc845e92a2b083983f4f68a9e4f0789cef1ac97ed1beac3694
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size 29726149
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stats.csv
CHANGED
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@@ -665,6 +665,7 @@ CC-MAIN-2026-08,2124,19507,2598213424,95309823,30481471,2026-03-13T15:37:22Z,577
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| 665 |
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CC-MAIN-2026-08,2301,19498,2589050373,94698511,30163652,2026-03-13T13:54:08Z,261,0,33,0
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CC-MAIN-2026-08,2302,19595,2575185844,96075881,29961924,2026-03-13T14:00:40Z,280,0,112,0
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CC-MAIN-2026-08,2303,19594,2612324314,94525336,29944034,2026-03-13T14:06:16Z,305,0,30,0
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@@ -711,7 +712,7 @@ CC-MAIN-2026-08,2581,19471,2567634976,95674819,29606440,2026-03-13T15:26:19Z,441
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CC-MAIN-2026-08,2582,19563,2556513838,98156888,31148205,2026-03-13T15:37:54Z,617,0,49,9
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CC-MAIN-2026-08,2127,19399,2549889958,95568982,29906356,2026-03-13T15:58:26Z,317,0,127,13
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CC-MAIN-2026-08,2614,19566,2581388744,91738092,29557124,2026-03-13T17:13:26Z,207,0,47,15
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CC-MAIN-2026-08,2810,19479,2567872535,94762671,29742907,2026-03-13T14:03:56Z,0,0,0,4
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