Publish shard CC-MAIN-2026-08/00549
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00549.parquet +3 -0
- stats.csv +1 -0
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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| 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) | ~48.4 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 32.7 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
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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 89h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 21h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 37m 38s avg 23s
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```
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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 **22,816,506 documents across 1181 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 1181 files of CC-MAIN-2026-08 (22,816,506 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1181 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~957.3 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) | ~48.4 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 32.7 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 103.0 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: ~957.3 GB of raw gzipped WARCs becomes **32.7 GB of Parquet** — a **96.6% total reduction** — containing 22,816,506 clean markdown documents.
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### Processing Times
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Pipeline timings across 1181 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 89h 47m 0s avg 4m 33s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 21h 44m 53s avg 1m 6s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 37m 38s avg 23s
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```
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data/CC-MAIN-2026-08/00549.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:1fbc7fabfe7385d6c12e0df3e48d049ec37c8525a04540a3ae4ecfc7c5383152
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size 29059604
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stats.csv
CHANGED
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@@ -437,6 +437,7 @@ CC-MAIN-2026-08,545,19432,2577257018,97337811,30840334,2026-03-14T01:29:50Z,378,
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CC-MAIN-2026-08,546,19388,2555311185,99479800,32927816,2026-03-14T01:40:03Z,396,0,202,91
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CC-MAIN-2026-08,547,19131,2538347583,94274193,30517327,2026-03-14T01:48:05Z,400,0,93,13
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CC-MAIN-2026-08,548,19430,2573909153,96226520,30326093,2026-03-14T01:57:20Z,454,0,92,15
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CC-MAIN-2026-08,551,19551,2609034951,89980913,29167227,2026-03-13T06:42:51Z,280,0,20,176
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CC-MAIN-2026-08,552,19402,2594817630,94092761,30309254,2026-03-13T06:48:30Z,211,0,46,80
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CC-MAIN-2026-08,553,19856,2617133708,99106486,30365588,2026-03-13T06:52:51Z,116,0,23,120
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CC-MAIN-2026-08,546,19388,2555311185,99479800,32927816,2026-03-14T01:40:03Z,396,0,202,91
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CC-MAIN-2026-08,547,19131,2538347583,94274193,30517327,2026-03-14T01:48:05Z,400,0,93,13
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CC-MAIN-2026-08,548,19430,2573909153,96226520,30326093,2026-03-14T01:57:20Z,454,0,92,15
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CC-MAIN-2026-08,549,19587,2578203255,91154133,29059604,2026-03-14T02:07:20Z,391,0,205,0
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CC-MAIN-2026-08,551,19551,2609034951,89980913,29167227,2026-03-13T06:42:51Z,280,0,20,176
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CC-MAIN-2026-08,552,19402,2594817630,94092761,30309254,2026-03-13T06:48:30Z,211,0,46,80
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CC-MAIN-2026-08,553,19856,2617133708,99106486,30365588,2026-03-13T06:52:51Z,116,0,23,120
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