Publish shard CC-MAIN-2026-08/00799
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/00799.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 **23,
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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) | 2.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~50.
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| Final Parquet (Zstd level 19) |
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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 2.9 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 93h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 6h 2m 48s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 22h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 48m 20s 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 **23,712,415 documents across 1227 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 1227 files of CC-MAIN-2026-08 (23,712,415 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1227 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~994.5 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~50.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 34.0 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 2.9 TB of uncompressed HTML down to 107.0 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: ~994.5 GB of raw gzipped WARCs becomes **34.0 GB of Parquet** — a **96.6% total reduction** — containing 23,712,415 clean markdown documents.
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### Processing Times
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Pipeline timings across 1227 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 93h 54m 58s avg 4m 35s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 6h 2m 48s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 22h 43m 56s avg 1m 6s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 48m 20s avg 22s
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```
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data/CC-MAIN-2026-08/00799.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:6fcc4566f410964bc49bb94b029536fab23213073175c13ed43cc9195b0f3cee
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size 29424540
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stats.csv
CHANGED
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@@ -585,6 +585,7 @@ CC-MAIN-2026-08,795,19307,2538738629,96815330,30888077,2026-03-14T01:50:50Z,444,
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CC-MAIN-2026-08,796,19519,2594593325,94691865,30105600,2026-03-14T02:00:05Z,411,0,151,21
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CC-MAIN-2026-08,797,19361,2587106167,92002417,29439496,2026-03-14T02:10:35Z,454,0,179,14
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CC-MAIN-2026-08,798,19332,2555419003,99434220,31645658,2026-03-14T02:21:57Z,477,0,178,24
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| 588 |
CC-MAIN-2026-08,851,19575,2612873485,97000364,30911294,2026-03-13T06:41:39Z,163,0,37,204
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CC-MAIN-2026-08,852,19334,2546015208,94959847,30205044,2026-03-13T06:45:52Z,183,0,57,11
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CC-MAIN-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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CC-MAIN-2026-08,796,19519,2594593325,94691865,30105600,2026-03-14T02:00:05Z,411,0,151,21
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CC-MAIN-2026-08,797,19361,2587106167,92002417,29439496,2026-03-14T02:10:35Z,454,0,179,14
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CC-MAIN-2026-08,798,19332,2555419003,99434220,31645658,2026-03-14T02:21:57Z,477,0,178,24
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CC-MAIN-2026-08,799,19275,2559716233,94060891,29424540,2026-03-14T02:30:35Z,422,0,120,0
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CC-MAIN-2026-08,851,19575,2612873485,97000364,30911294,2026-03-13T06:41:39Z,163,0,37,204
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CC-MAIN-2026-08,852,19334,2546015208,94959847,30205044,2026-03-13T06:45:52Z,183,0,57,11
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CC-MAIN-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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