Publish shard CC-MAIN-2026-08/03122
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/03122.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 **15,
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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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|---|---|---|---|
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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) | ~32.
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| Final Parquet (Zstd level 19) | 21.7 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 68.
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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 44h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 50m
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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 **15,144,355 documents across 783 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 783 files of CC-MAIN-2026-08 (15,144,355 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 783 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~634.7 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) | ~32.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.7 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 68.3 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 68.2%.
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End to end: ~634.7 GB of raw gzipped WARCs becomes **21.7 GB of Parquet** — a **96.6% total reduction** — containing 15,144,355 clean markdown documents.
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### Processing Times
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Pipeline timings across 783 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 44h 30m 10s avg 3m 24s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h 26m 53s avg 43s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 50m 34s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/03122.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:7c7798fffe57fe0949e726329eb8c0ab7a1d84183d31303ba2f45472d0011459
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size 30116682
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stats.csv
CHANGED
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@@ -669,7 +669,7 @@ CC-MAIN-2026-08,2155,19658,2616939549,93318117,29726149,2026-03-13T17:14:26Z,334
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CC-MAIN-2026-08,2156,19927,2657322438,97174427,30255289,2026-03-13T17:18:25Z,183,0,25,16
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CC-MAIN-2026-08,2157,19634,2593240480,98042150,30239020,2026-03-13T17:23:11Z,245,0,56,15
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CC-MAIN-2026-08,2158,19532,2570906882,97371471,31276296,2026-03-13T17:28:02Z,225,0,77,15
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-
CC-MAIN-2026-08,2159,19527,2581734072,91128948,28761531,2026-03-13T17:32:32Z,234,0,37,
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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-2026-08,3119,19460,2584493930,93876776,31478880,2026-03-13T17:15:26Z,454,0,25,15
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CC-MAIN-2026-08,3120,19534,2574176327,90852771,28995496,2026-03-13T17:23:40Z,448,0,45,26
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| 780 |
CC-MAIN-2026-08,3121,19444,2605073292,97273749,30909508,2026-03-13T17:29:02Z,269,0,48,24
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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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CC-MAIN-2026-08,2156,19927,2657322438,97174427,30255289,2026-03-13T17:18:25Z,183,0,25,16
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CC-MAIN-2026-08,2157,19634,2593240480,98042150,30239020,2026-03-13T17:23:11Z,245,0,56,15
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CC-MAIN-2026-08,2158,19532,2570906882,97371471,31276296,2026-03-13T17:28:02Z,225,0,77,15
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CC-MAIN-2026-08,2159,19527,2581734072,91128948,28761531,2026-03-13T17:32:32Z,234,0,37,19
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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-2026-08,3119,19460,2584493930,93876776,31478880,2026-03-13T17:15:26Z,454,0,25,15
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CC-MAIN-2026-08,3120,19534,2574176327,90852771,28995496,2026-03-13T17:23:40Z,448,0,45,26
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CC-MAIN-2026-08,3121,19444,2605073292,97273749,30909508,2026-03-13T17:29:02Z,269,0,48,24
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CC-MAIN-2026-08,3122,19568,2595613545,93965912,30116682,2026-03-13T17:34:17Z,249,0,61,0
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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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| 784 |
CC-MAIN-2026-08,3553,19595,2591041524,96226434,30415440,2026-03-13T12:21:13Z,166,0,31,0
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