Publish shard CC-MAIN-2026-08/02354
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/02354.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 **
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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) | ~31.8 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.5 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.
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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
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h 21m
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h
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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 **15,007,621 documents across 776 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 776 files of CC-MAIN-2026-08 (15,007,621 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 776 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~629.0 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) | ~31.8 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.5 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 67.7 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: ~629.0 GB of raw gzipped WARCs becomes **21.5 GB of Parquet** — a **96.6% total reduction** — containing 15,007,621 clean markdown documents.
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### Processing Times
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Pipeline timings across 776 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 44h 1m 44s avg 3m 24s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h 21m 53s avg 43s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 48m 10s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/02354.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:987087ec9344cc22e60797b5cb2e13bbc09b785d815432ad857a51240b2d34aa
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size 29788280
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stats.csv
CHANGED
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@@ -695,6 +695,7 @@ CC-MAIN-2026-08,2324,19548,2591124523,95026738,29706594,2026-03-13T15:08:51Z,243
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| 695 |
CC-MAIN-2026-08,2325,19795,2595958710,94769924,30381849,2026-03-13T15:21:56Z,340,0,120,4
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CC-MAIN-2026-08,2551,5410,611835922,35005098,10258608,2026-03-13T12:28:41Z,32,0,10,0
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CC-MAIN-2026-08,2552,19598,2602424114,96235194,30473559,2026-03-13T12:36:26Z,437,0,26,0
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CC-MAIN-2026-08,2553,19534,2542432805,90911643,29613848,2026-03-13T12:44:33Z,444,0,41,0
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@@ -770,7 +771,7 @@ CC-MAIN-2026-08,3089,19393,2567259564,89712366,28381748,2026-03-13T16:08:56Z,434
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| 770 |
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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-2026-08,3120,19534,2574176327,90852771,28995496,2026-03-13T17:23:40Z,448,0,45,
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CC-MAIN-2026-08,2551,5410,611835922,35005098,10258608,2026-03-13T12:28:41Z,32,0,10,0
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CC-MAIN-2026-08,2553,19534,2542432805,90911643,29613848,2026-03-13T12:44:33Z,444,0,41,0
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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-2026-08,3553,19595,2591041524,96226434,30415440,2026-03-13T12:21:13Z,166,0,31,0
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