Publish shard CC-MAIN-2026-08/01015
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/01015.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 **
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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) | 1.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~33.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) |
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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 1.9 TB of uncompressed HTML down to 72.
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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 47h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 3h 42m 14s avg 16s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 10h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 6h 5m 28s avg 26s
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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 **16,019,126 documents across 828 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 828 files of CC-MAIN-2026-08 (16,019,126 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 828 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~671.1 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~33.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 23.0 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 1.9 TB of uncompressed HTML down to 72.2 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: ~671.1 GB of raw gzipped WARCs becomes **23.0 GB of Parquet** — a **96.6% total reduction** — containing 16,019,126 clean markdown documents.
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### Processing Times
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Pipeline timings across 828 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 47h 49m 34s avg 3m 27s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 3h 42m 14s avg 16s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 10h 38m 15s avg 46s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 6h 5m 28s avg 26s
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```
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data/CC-MAIN-2026-08/01015.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:4d2dac2cbca7a252d77b518ba8c7683b9e8e37da0e6901976a7c6263947c6ddd
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size 28814674
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stats.csv
CHANGED
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@@ -494,6 +494,7 @@ CC-MAIN-2026-08,1011,19545,2606224725,91771846,29436891,2026-03-13T18:11:32Z,566
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CC-MAIN-2026-08,1012,19467,2551049903,95379096,30231686,2026-03-13T18:16:56Z,280,0,82,22
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CC-MAIN-2026-08,1013,19632,2589446285,96006808,30120430,2026-03-13T18:23:56Z,336,0,83,30
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CC-MAIN-2026-08,1014,19503,2566088846,94039374,29397377,2026-03-13T18:32:26Z,429,0,88,26
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CC-MAIN-2026-08,1101,19721,2641197765,95719568,30240239,2026-03-13T09:59:33Z,564,0,296,0
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CC-MAIN-2026-08,1102,19562,2608129691,99280759,31748974,2026-03-13T10:28:07Z,1518,0,191,0
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CC-MAIN-2026-08,1103,19270,2517580674,89253461,28361470,2026-03-13T10:55:39Z,1380,0,268,0
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CC-MAIN-2026-08,1012,19467,2551049903,95379096,30231686,2026-03-13T18:16:56Z,280,0,82,22
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CC-MAIN-2026-08,1013,19632,2589446285,96006808,30120430,2026-03-13T18:23:56Z,336,0,83,30
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CC-MAIN-2026-08,1014,19503,2566088846,94039374,29397377,2026-03-13T18:32:26Z,429,0,88,26
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CC-MAIN-2026-08,1015,19385,2577073795,90909836,28814674,2026-03-13T18:41:07Z,408,0,97,0
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CC-MAIN-2026-08,1101,19721,2641197765,95719568,30240239,2026-03-13T09:59:33Z,564,0,296,0
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CC-MAIN-2026-08,1102,19562,2608129691,99280759,31748974,2026-03-13T10:28:07Z,1518,0,191,0
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CC-MAIN-2026-08,1103,19270,2517580674,89253461,28361470,2026-03-13T10:55:39Z,1380,0,268,0
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