Publish 2 shards CC-MAIN-2026-08/00224–01066
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00224.parquet +3 -0
- data/CC-MAIN-2026-08/01066.parquet +3 -0
- stats.csv +2 -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 **25,
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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) | 3.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~
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| Final Parquet (Zstd level 19) | 37.1 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 3.1 TB of uncompressed HTML down to
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End to end: ~1.1 TB of raw gzipped WARCs becomes **37.1 GB of Parquet** — a **96.6% total reduction** — containing 25,
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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 103h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 23m 29s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 25h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 8h 16m 1s 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 **25,947,325 documents across 1342 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 1342 files of CC-MAIN-2026-08 (25,947,325 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1342 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) | 3.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~55.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 37.1 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 3.1 TB of uncompressed HTML down to 117.0 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: ~1.1 TB of raw gzipped WARCs becomes **37.1 GB of Parquet** — a **96.6% total reduction** — containing 25,947,325 clean markdown documents.
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### Processing Times
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Pipeline timings across 1342 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 103h 45m 48s avg 4m 38s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 23m 29s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 25h 27m 14s avg 1m 8s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 8h 16m 1s avg 22s
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```
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data/CC-MAIN-2026-08/00224.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:efe88720840815c9570bbe732f73d277d73165a2c387cf7608a74589968c77a7
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size 30252382
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data/CC-MAIN-2026-08/01066.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:350cd763c5dc17ffda40ce61270b34142ce3b21300b7d82e9761db0ebd83b426
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size 29260449
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stats.csv
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@@ -224,6 +224,7 @@ CC-MAIN-2026-08,220,19501,2595071559,92972713,29596160,2026-03-14T02:55:44Z,462,
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CC-MAIN-2026-08,221,19509,2599147223,94944548,29724390,2026-03-14T03:10:17Z,682,0,106,14
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CC-MAIN-2026-08,222,19469,2586185055,93466624,29321481,2026-03-14T03:19:55Z,488,0,142,21
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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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| 227 |
CC-MAIN-2026-08,250,19200,2541559671,94959737,30214413,2026-03-13T17:42:47Z,511,0,85,19
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| 228 |
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-2026-08,1063,19557,2587782329,94279704,29174136,2026-03-14T03:07:32Z,654,0,59,27
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CC-MAIN-2026-08,1064,19743,2608994155,92635672,29768838,2026-03-14T03:16:50Z,476,0,91,14
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| 747 |
CC-MAIN-2026-08,1065,19494,2561010578,92717514,29070988,2026-03-14T03:30:26Z,663,0,124,13
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| 748 |
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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CC-MAIN-2026-08,221,19509,2599147223,94944548,29724390,2026-03-14T03:10:17Z,682,0,106,14
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CC-MAIN-2026-08,222,19469,2586185055,93466624,29321481,2026-03-14T03:19:55Z,488,0,142,21
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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,481,0,208,0
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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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| 746 |
CC-MAIN-2026-08,1063,19557,2587782329,94279704,29174136,2026-03-14T03:07:32Z,654,0,59,27
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CC-MAIN-2026-08,1064,19743,2608994155,92635672,29768838,2026-03-14T03:16:50Z,476,0,91,14
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CC-MAIN-2026-08,1065,19494,2561010578,92717514,29070988,2026-03-14T03:30:26Z,663,0,124,13
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| 749 |
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CC-MAIN-2026-08,1066,19501,2570760583,90594729,29260449,2026-03-14T03:41:39Z,480,0,210,0
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| 750 |
CC-MAIN-2026-08,1101,19721,2641197765,95719568,30240239,2026-03-13T09:59:33Z,564,0,296,0
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| 751 |
CC-MAIN-2026-08,1102,19562,2608129691,99280759,31748974,2026-03-13T10:28:07Z,1518,0,191,0
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| 752 |
CC-MAIN-2026-08,1103,19270,2517580674,89253461,28361470,2026-03-13T10:55:39Z,1380,0,268,0
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