Publish shard CC-MAIN-2026-08/03119
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/03119.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 **14,
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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) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~31.
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| Final Parquet (Zstd level 19) | 21.3 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 1.8 TB of uncompressed HTML down to 67.1 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: ~
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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 43h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h 17m
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 45m
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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 **14,889,818 documents across 770 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 770 files of CC-MAIN-2026-08 (14,889,818 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 770 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~624.1 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~31.6 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.3 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 1.8 TB of uncompressed HTML down to 67.1 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: ~624.1 GB of raw gzipped WARCs becomes **21.3 GB of Parquet** — a **96.6% total reduction** — containing 14,889,818 clean markdown documents.
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### Processing Times
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Pipeline timings across 770 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 43h 25m 4s avg 3m 22s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h 17m 37s avg 43s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 45m 38s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/03119.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:a0ed350c7eab55ffe65b64b5fcdb0b3c7f77b4b9b9d22ee72ea908f4861c57f1
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size 31478880
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stats.csv
CHANGED
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@@ -665,7 +665,7 @@ CC-MAIN-2026-08,2124,19507,2598213424,95309823,30481471,2026-03-13T15:37:22Z,577
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| 665 |
CC-MAIN-2026-08,2125,19427,2585686106,95664309,29507764,2026-03-13T15:46:11Z,470,0,65,14
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CC-MAIN-2026-08,2126,19604,2590610069,97476800,30121196,2026-03-13T15:50:56Z,210,0,66,25
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CC-MAIN-2026-08,2127,19399,2549889958,95568982,29906356,2026-03-13T15:58:26Z,317,0,127,13
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-
CC-MAIN-2026-08,2155,19658,2616939549,93318117,29726149,2026-03-13T17:14:26Z,334,0,48,
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CC-MAIN-2026-08,2301,19498,2589050373,94698511,30163652,2026-03-13T13:54:08Z,261,0,33,0
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CC-MAIN-2026-08,2302,19595,2575185844,96075881,29961924,2026-03-13T14:00:40Z,280,0,112,0
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CC-MAIN-2026-08,2303,19594,2612324314,94525336,29944034,2026-03-13T14:06:16Z,305,0,30,0
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CC-MAIN-2026-08,3089,19393,2567259564,89712366,28381748,2026-03-13T16:08:56Z,434,0,30,13
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CC-MAIN-2026-08,3090,19725,2644246878,95325452,30136348,2026-03-13T16:20:26Z,590,0,98,23
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CC-MAIN-2026-08,3091,19396,2586632962,92038056,29116167,2026-03-13T16:23:56Z,172,0,32,23
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CC-MAIN-2026-08,3551,19488,2583454997,93104559,29560362,2026-03-13T12:14:48Z,219,0,44,0
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CC-MAIN-2026-08,2127,19399,2549889958,95568982,29906356,2026-03-13T15:58:26Z,317,0,127,13
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CC-MAIN-2026-08,2155,19658,2616939549,93318117,29726149,2026-03-13T17:14:26Z,334,0,48,15
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CC-MAIN-2026-08,2301,19498,2589050373,94698511,30163652,2026-03-13T13:54:08Z,261,0,33,0
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CC-MAIN-2026-08,2302,19595,2575185844,96075881,29961924,2026-03-13T14:00:40Z,280,0,112,0
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CC-MAIN-2026-08,2303,19594,2612324314,94525336,29944034,2026-03-13T14:06:16Z,305,0,30,0
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CC-MAIN-2026-08,3089,19393,2567259564,89712366,28381748,2026-03-13T16:08:56Z,434,0,30,13
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CC-MAIN-2026-08,3090,19725,2644246878,95325452,30136348,2026-03-13T16:20:26Z,590,0,98,23
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CC-MAIN-2026-08,3091,19396,2586632962,92038056,29116167,2026-03-13T16:23:56Z,172,0,32,23
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CC-MAIN-2026-08,3119,19460,2584493930,93876776,31478880,2026-03-13T17:15:26Z,454,0,25,0
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CC-MAIN-2026-08,3551,19488,2583454997,93104559,29560362,2026-03-13T12:14:48Z,219,0,44,0
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CC-MAIN-2026-08,3552,19589,2622893447,95992637,29462588,2026-03-13T12:17:56Z,162,0,24,0
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CC-MAIN-2026-08,3553,19595,2591041524,96226434,30415440,2026-03-13T12:21:13Z,166,0,31,0
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