Publish shards CC-MAIN-2026-08/02301–02310 (10 files)
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/02301.parquet +3 -0
- data/CC-MAIN-2026-08/02302.parquet +3 -0
- data/CC-MAIN-2026-08/02303.parquet +3 -0
- data/CC-MAIN-2026-08/02304.parquet +3 -0
- data/CC-MAIN-2026-08/02305.parquet +3 -0
- data/CC-MAIN-2026-08/02306.parquet +3 -0
- data/CC-MAIN-2026-08/02307.parquet +3 -0
- data/CC-MAIN-2026-08/02308.parquet +3 -0
- data/CC-MAIN-2026-08/02309.parquet +3 -0
- data/CC-MAIN-2026-08/02310.parquet +3 -0
- stats.csv +15 -10
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 **
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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) | 1.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~
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| Final Parquet (Zstd level 19) | 12.
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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 1.1 TB of uncompressed HTML down to 40.
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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 21h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 37m 10s avg 12s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 5h
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Publish (HuggingFace) █████░░░░░░░░░░░░░░░░░░░ total 4h
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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 **9,015,099 documents across 468 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 468 files of CC-MAIN-2026-08 (9,015,099 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 468 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~379.3 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~19.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 12.9 GB | ~2.9 TB | **-32.3%** 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 1.1 TB of uncompressed HTML down to 40.6 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: ~379.3 GB of raw gzipped WARCs becomes **12.9 GB of Parquet** — a **96.6% total reduction** — containing 9,015,099 clean markdown documents.
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### Processing Times
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Pipeline timings across 468 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 21h 25m 39s avg 2m 44s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 37m 10s avg 12s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 5h 9m 7s avg 39s
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Publish (HuggingFace) █████░░░░░░░░░░░░░░░░░░░ total 4h 44m 6s avg 36s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/02301.parquet
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stats.csv
CHANGED
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@@ -431,11 +431,14 @@ CC-MAIN-2026-08,1902,19329,2585845400,90307011,28884394,2026-03-13T12:42:14Z,285
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CC-MAIN-2026-08,3057,19769,2640936819,95622613,30249966,2026-03-13T12:44:35Z,445,0,40,5
|
| 465 |
+
CC-MAIN-2026-08,3058,19481,2575245124,90869447,29357767,2026-03-13T12:50:08Z,297,0,35,5
|
| 466 |
+
CC-MAIN-2026-08,3059,19563,2638918159,92916393,29489007,2026-03-13T12:54:06Z,202,0,34,5
|
| 467 |
+
CC-MAIN-2026-08,3060,19709,2635187365,98385844,31472946,2026-03-13T12:57:21Z,155,0,40,5
|
| 468 |
CC-MAIN-2026-08,3551,19488,2583454997,93104559,29560362,2026-03-13T12:14:48Z,219,0,44,0
|
| 469 |
CC-MAIN-2026-08,3552,19589,2622893447,95992637,29462588,2026-03-13T12:17:56Z,162,0,24,0
|
| 470 |
CC-MAIN-2026-08,3553,19595,2591041524,96226434,30415440,2026-03-13T12:21:13Z,166,0,31,0
|