Publish shard CC-MAIN-2026-08/00178
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00178.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 **16,
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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) | 2.0 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~
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| Final Parquet (Zstd level 19) | 23.6 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 2.0 TB of uncompressed HTML down to 74.
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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 50h
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Convert (HTML → MD) █
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 11h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 13m
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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 **16,504,576 documents across 853 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 853 files of CC-MAIN-2026-08 (16,504,576 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 853 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~691.4 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.0 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~35.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 23.6 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 2.0 TB of uncompressed HTML down to 74.4 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 68.2%.
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End to end: ~691.4 GB of raw gzipped WARCs becomes **23.6 GB of Parquet** — a **96.6% total reduction** — containing 16,504,576 clean markdown documents.
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### Processing Times
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Pipeline timings across 853 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 50h 13m 32s avg 3m 31s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 4h 11m 3s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 11h 18m 56s avg 47s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 13m 20s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00178.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:fd322ce37f08559c20027c4d427deaaf260b883bbd5341516632262ca2cf2945
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size 29711514
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stats.csv
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@@ -178,6 +178,7 @@ CC-MAIN-2026-08,174,19430,2594383888,94151433,30292019,2026-03-13T18:41:24Z,426,
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CC-MAIN-2026-08,175,19361,2535880308,90825657,29300682,2026-03-13T18:51:11Z,500,0,82,20
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CC-MAIN-2026-08,177,19607,2613090732,93217533,29178678,2026-03-13T19:08:26Z,371,0,100,10
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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-2026-08,1016,19688,2601213579,96284971,29536751,2026-03-13T18:51:11Z,531,0,79,20
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CC-MAIN-2026-08,1017,19243,2549255009,91047764,28776192,2026-03-13T19:00:26Z,447,0,101,17
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CC-MAIN-2026-08,1018,19185,2567255288,91523314,28541903,2026-03-13T19:08:26Z,387,0,99,10
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CC-MAIN-2026-08,176,19391,2554258489,97225767,30342108,2026-03-13T19:00:26Z,460,0,98,17
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CC-MAIN-2026-08,177,19607,2613090732,93217533,29178678,2026-03-13T19:08:26Z,371,0,100,10
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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-2026-08,1016,19688,2601213579,96284971,29536751,2026-03-13T18:51:11Z,531,0,79,20
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CC-MAIN-2026-08,1017,19243,2549255009,91047764,28776192,2026-03-13T19:00:26Z,447,0,101,17
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CC-MAIN-2026-08,1018,19185,2567255288,91523314,28541903,2026-03-13T19:08:26Z,387,0,99,10
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CC-MAIN-2026-08,1019,19755,2616441881,95366689,29492176,2026-03-13T19:16:23Z,348,0,130,15
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CC-MAIN-2026-08,1101,19721,2641197765,95719568,30240239,2026-03-13T09:59:33Z,564,0,296,0
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CC-MAIN-2026-08,1102,19562,2608129691,99280759,31748974,2026-03-13T10:28:07Z,1518,0,191,0
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CC-MAIN-2026-08,1103,19270,2517580674,89253461,28361470,2026-03-13T10:55:39Z,1380,0,268,0
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