Publish shard CC-MAIN-2026-08/00226
Browse files- README.md +8 -8
- data/CC-MAIN-2026-08/00226.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 **26,
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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) | 3.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~56.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 37.9 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 3.2 TB of uncompressed HTML down to 119.
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End to end: ~1.1 TB of raw gzipped WARCs becomes **37.9 GB of Parquet** — a **96.6% total reduction** — containing 26,
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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 105h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 49m 11s avg 20s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 26h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 8h 23m 17s avg 22s
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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 **26,474,169 documents across 1369 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 1369 files of CC-MAIN-2026-08 (26,474,169 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1369 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) | 3.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~56.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 37.9 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 3.2 TB of uncompressed HTML down to 119.4 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 **37.9 GB of Parquet** — a **96.6% total reduction** — containing 26,474,169 clean markdown documents.
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### Processing Times
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Pipeline timings across 1369 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 105h 52m 59s avg 4m 38s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 49m 11s avg 20s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 26h 9m 17s avg 1m 8s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 8h 23m 17s avg 22s
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```
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data/CC-MAIN-2026-08/00226.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:44006d126fd9b8ad7a0537fdf3757cd9bfd7e04ca32c87a5b679ab3a44776bf3
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size 30168231
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stats.csv
CHANGED
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@@ -226,6 +226,7 @@ CC-MAIN-2026-08,222,19469,2586185055,93466624,29321481,2026-03-14T03:19:55Z,488,
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CC-MAIN-2026-08,223,19374,2546486286,94493432,30002668,2026-03-14T03:30:26Z,516,0,124,13
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CC-MAIN-2026-08,224,19415,2597097096,94871206,30252382,2026-03-14T03:41:39Z,481,0,208,17
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CC-MAIN-2026-08,225,19445,2574036300,95389568,30103324,2026-03-14T03:52:29Z,591,0,33,15
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CC-MAIN-2026-08,250,19200,2541559671,94959737,30214413,2026-03-13T17:42:47Z,511,0,85,19
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CC-MAIN-2026-08,251,19610,2594898345,97558492,31917087,2026-03-13T06:42:12Z,277,0,23,136
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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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CC-MAIN-2026-08,223,19374,2546486286,94493432,30002668,2026-03-14T03:30:26Z,516,0,124,13
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CC-MAIN-2026-08,224,19415,2597097096,94871206,30252382,2026-03-14T03:41:39Z,481,0,208,17
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CC-MAIN-2026-08,225,19445,2574036300,95389568,30103324,2026-03-14T03:52:29Z,591,0,33,15
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CC-MAIN-2026-08,226,19092,2531077520,94266756,30168231,2026-03-14T04:00:56Z,389,0,139,0
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CC-MAIN-2026-08,250,19200,2541559671,94959737,30214413,2026-03-13T17:42:47Z,511,0,85,19
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CC-MAIN-2026-08,251,19610,2594898345,97558492,31917087,2026-03-13T06:42:12Z,277,0,23,136
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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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