Publish shard CC-MAIN-2026-08/00361
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/00361.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 **19,
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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) | ~796.
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| HTML extracted (uncompressed) | 2.3 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~40.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 27.
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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 2.3 TB of uncompressed HTML down to 85.
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End to end: ~796.
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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 67h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 23m 35s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 16h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h
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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 **19,035,722 documents across 983 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 983 files of CC-MAIN-2026-08 (19,035,722 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 983 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~796.8 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.3 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~40.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 27.3 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 2.3 TB of uncompressed HTML down to 85.9 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: ~796.8 GB of raw gzipped WARCs becomes **27.3 GB of Parquet** — a **96.6% total reduction** — containing 19,035,722 clean markdown documents.
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### Processing Times
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Pipeline timings across 983 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 67h 55m 9s avg 4m 8s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 23m 35s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 16h 5m 40s avg 58s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 58m 13s avg 25s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00361.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:8ead6ab9e05ac9e908d996ceac2fdb7e2428f84254b10fe25d4063274cd4c2c7
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size 33034826
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stats.csv
CHANGED
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@@ -200,7 +200,7 @@ CC-MAIN-2026-08,196,19473,2586001479,97105191,30336090,2026-03-13T22:26:11Z,600,
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CC-MAIN-2026-08,197,19299,2546949841,94358619,29675226,2026-03-13T22:38:26Z,599,0,129,8
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CC-MAIN-2026-08,198,19409,2580674282,93344348,29591737,2026-03-13T22:51:11Z,612,0,148,16
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CC-MAIN-2026-08,199,19177,2509267183,94076859,30255587,2026-03-13T23:02:12Z,532,0,137,12
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-
CC-MAIN-2026-08,200,19357,2565521260,92091332,29401002,2026-03-13T23:14:26Z,600,0,133,
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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-2026-08,358,19445,2579645422,100685173,30945500,2026-03-13T22:38:26Z,602,0,131,8
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CC-MAIN-2026-08,359,19354,2571214019,98101218,30708847,2026-03-13T22:51:11Z,605,0,153,16
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CC-MAIN-2026-08,360,19641,2563345822,95145193,30350889,2026-03-13T23:02:12Z,529,0,140,12
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CC-MAIN-2026-08,401,19441,2586676962,94334130,29618260,2026-03-13T11:41:00Z,0,0,33,0
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30560442,2026-03-13T11:49:21Z,0,443,57,0
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29341198,2026-03-13T11:56:46Z,0,414,29,0
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CC-MAIN-2026-08,197,19299,2546949841,94358619,29675226,2026-03-13T22:38:26Z,599,0,129,8
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CC-MAIN-2026-08,198,19409,2580674282,93344348,29591737,2026-03-13T22:51:11Z,612,0,148,16
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CC-MAIN-2026-08,199,19177,2509267183,94076859,30255587,2026-03-13T23:02:12Z,532,0,137,12
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CC-MAIN-2026-08,200,19357,2565521260,92091332,29401002,2026-03-13T23:14:26Z,600,0,133,14
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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-2026-08,358,19445,2579645422,100685173,30945500,2026-03-13T22:38:26Z,602,0,131,8
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CC-MAIN-2026-08,359,19354,2571214019,98101218,30708847,2026-03-13T22:51:11Z,605,0,153,16
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CC-MAIN-2026-08,360,19641,2563345822,95145193,30350889,2026-03-13T23:02:12Z,529,0,140,12
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CC-MAIN-2026-08,361,19338,2602591932,103405361,33034826,2026-03-13T23:14:47Z,607,0,140,0
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CC-MAIN-2026-08,401,19441,2586676962,94334130,29618260,2026-03-13T11:41:00Z,0,0,33,0
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30560442,2026-03-13T11:49:21Z,0,443,57,0
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29341198,2026-03-13T11:56:46Z,0,414,29,0
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