Publish shard CC-MAIN-2026-08/00372
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00372.parquet +3 -0
- stats.csv +1 -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 **21,
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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) | 2.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~46.2 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 31.2 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 2.6 TB of uncompressed HTML down to 98.
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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 85h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 20h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 20m 33s avg 23s
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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 **21,805,624 documents across 1129 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 1129 files of CC-MAIN-2026-08 (21,805,624 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1129 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~915.1 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~46.2 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 31.2 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 2.6 TB of uncompressed HTML down to 98.4 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 68.3%.
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End to end: ~915.1 GB of raw gzipped WARCs becomes **31.2 GB of Parquet** — a **96.6% total reduction** — containing 21,805,624 clean markdown documents.
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### Processing Times
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Pipeline timings across 1129 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 85h 29m 59s avg 4m 32s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 20h 37m 41s avg 1m 5s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 20m 33s avg 23s
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```
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data/CC-MAIN-2026-08/00372.parquet
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@@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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oid sha256:2bcd94ab714d876acf626e9ff0fd518a2e6d07d5d994c4698c827e2c2f750b21
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size 29686173
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stats.csv
CHANGED
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@@ -334,6 +334,7 @@ CC-MAIN-2026-08,368,19258,2574726313,93452151,30093839,2026-03-14T01:06:44Z,756,
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CC-MAIN-2026-08,369,19299,2562815931,93550342,29772834,2026-03-14T01:06:44Z,777,0,141,5
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CC-MAIN-2026-08,370,19242,2559224128,97323871,31587291,2026-03-14T01:14:04Z,750,0,59,23
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CC-MAIN-2026-08,371,19658,2574470616,95555396,29867038,2026-03-14T01:22:05Z,492,0,26,24
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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-2026-08,369,19299,2562815931,93550342,29772834,2026-03-14T01:06:44Z,777,0,141,5
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CC-MAIN-2026-08,370,19242,2559224128,97323871,31587291,2026-03-14T01:14:04Z,750,0,59,23
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CC-MAIN-2026-08,371,19658,2574470616,95555396,29867038,2026-03-14T01:22:05Z,492,0,26,24
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CC-MAIN-2026-08,372,19730,2630163419,93025382,29686173,2026-03-14T01:27:05Z,219,0,70,0
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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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