Publish shard CC-MAIN-2026-08/09946
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/09946.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 **188,
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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) | ~7.9 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 22.
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| Packed markdown WARC (.md.warc.gz) | ~396.8 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 267.7 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 22.
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End to end: ~7.9 TB of raw gzipped WARCs becomes **267.7 GB of Parquet** — a **96.7% total reduction** — containing 188,
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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 614h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 35m 34s avg 6s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 134h 51m
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 66h 54m
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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 **188,568,328 documents across 10000 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 10000 files of CC-MAIN-2026-08 (188,568,328 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 10000 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~7.9 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 22.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~396.8 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 267.7 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 22.7 TB of uncompressed HTML down to 844.3 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: ~7.9 TB of raw gzipped WARCs becomes **267.7 GB of Parquet** — a **96.7% total reduction** — containing 188,568,328 clean markdown documents.
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### Processing Times
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Pipeline timings across 10000 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 614h 53m 24s avg 3m 41s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 35m 34s avg 6s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 134h 51m 24s avg 48s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 66h 54m 52s avg 24s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/09946.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:d4e08c64d7dcc7e2f8f3b4a1796c0b9fed5ce2958b3f2da4b606aea5e4196fb2
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size 30117894
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stats.csv
CHANGED
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@@ -9946,6 +9946,7 @@ CC-MAIN-2026-08,9942,19464,2560891383,92911643,29573857,2026-03-20T03:07:47Z,147
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| 9946 |
CC-MAIN-2026-08,9943,19552,2571276485,93859920,29337690,2026-03-20T01:44:17Z,177,0,55,20
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| 9947 |
CC-MAIN-2026-08,9944,19398,2522282040,95238737,30397717,2026-03-20T01:48:17Z,149,0,62,14
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| 9948 |
CC-MAIN-2026-08,9945,19693,2576715824,95543177,29859738,2026-03-20T01:52:32Z,131,0,53,21
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| 9949 |
CC-MAIN-2026-08,9947,19258,2527288246,97097122,30137519,2026-03-20T01:56:02Z,244,0,28,17
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| 9950 |
CC-MAIN-2026-08,9948,19545,2574101909,95017301,29874399,2026-03-20T02:02:17Z,236,0,36,59
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| 9951 |
CC-MAIN-2026-08,9949,19429,2531040398,93121233,29400334,2026-03-20T03:34:17Z,173,0,22,21
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|
@@ -9982,7 +9983,7 @@ CC-MAIN-2026-08,9979,19375,2541892076,91319099,29349175,2026-03-20T01:50:17Z,217
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|
| 9982 |
CC-MAIN-2026-08,9980,19301,2492442624,91241333,29115010,2026-03-20T03:18:32Z,121,0,18,28
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| 9983 |
CC-MAIN-2026-08,9981,19469,2582219569,94275829,29359817,2026-03-20T01:56:02Z,245,0,29,17
|
| 9984 |
CC-MAIN-2026-08,9982,19365,2525200797,91288349,28770610,2026-03-20T02:02:17Z,235,0,35,59
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| 9985 |
-
CC-MAIN-2026-08,9983,19455,2564709111,95168529,29778127,2026-03-20T03:36:17Z,150,0,23,
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CC-MAIN-2026-08,9984,19193,2507611748,90452328,29027172,2026-03-20T02:08:02Z,239,0,34,16
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CC-MAIN-2026-08,9985,19367,2531391271,94995010,30776832,2026-03-20T02:10:32Z,166,0,38,14
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| 9988 |
CC-MAIN-2026-08,9986,19589,2541080212,94152803,29609822,2026-03-20T03:23:17Z,174,0,25,50
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| 9946 |
CC-MAIN-2026-08,9943,19552,2571276485,93859920,29337690,2026-03-20T01:44:17Z,177,0,55,20
|
| 9947 |
CC-MAIN-2026-08,9944,19398,2522282040,95238737,30397717,2026-03-20T01:48:17Z,149,0,62,14
|
| 9948 |
CC-MAIN-2026-08,9945,19693,2576715824,95543177,29859738,2026-03-20T01:52:32Z,131,0,53,21
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| 9949 |
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CC-MAIN-2026-08,9946,19374,2550983301,93264377,30117894,2026-03-20T03:38:17Z,95,0,16,0
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| 9950 |
CC-MAIN-2026-08,9947,19258,2527288246,97097122,30137519,2026-03-20T01:56:02Z,244,0,28,17
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| 9951 |
CC-MAIN-2026-08,9948,19545,2574101909,95017301,29874399,2026-03-20T02:02:17Z,236,0,36,59
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| 9952 |
CC-MAIN-2026-08,9949,19429,2531040398,93121233,29400334,2026-03-20T03:34:17Z,173,0,22,21
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|
| 9983 |
CC-MAIN-2026-08,9980,19301,2492442624,91241333,29115010,2026-03-20T03:18:32Z,121,0,18,28
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| 9984 |
CC-MAIN-2026-08,9981,19469,2582219569,94275829,29359817,2026-03-20T01:56:02Z,245,0,29,17
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| 9985 |
CC-MAIN-2026-08,9982,19365,2525200797,91288349,28770610,2026-03-20T02:02:17Z,235,0,35,59
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| 9986 |
+
CC-MAIN-2026-08,9983,19455,2564709111,95168529,29778127,2026-03-20T03:36:17Z,150,0,23,17
|
| 9987 |
CC-MAIN-2026-08,9984,19193,2507611748,90452328,29027172,2026-03-20T02:08:02Z,239,0,34,16
|
| 9988 |
CC-MAIN-2026-08,9985,19367,2531391271,94995010,30776832,2026-03-20T02:10:32Z,166,0,38,14
|
| 9989 |
CC-MAIN-2026-08,9986,19589,2541080212,94152803,29609822,2026-03-20T03:23:17Z,174,0,25,50
|