Publish 3 shards CC-MAIN-2026-08/05181–06163
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/05181.parquet +3 -0
- data/CC-MAIN-2026-08/05657.parquet +3 -0
- data/CC-MAIN-2026-08/06163.parquet +3 -0
- stats.csv +4 -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 **49,
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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) | ~2.0 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 5.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~104.
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| Final Parquet (Zstd level 19) | 70.
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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 5.9 TB of uncompressed HTML down to 221.
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End to end: ~2.0 TB of raw gzipped WARCs becomes **70.
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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 219h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 12h 57m 19s avg 18s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 56h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 19h
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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 **49,242,846 documents across 2541 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 2541 files of CC-MAIN-2026-08 (49,242,846 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 2541 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~2.0 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 5.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~104.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 70.2 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 5.9 TB of uncompressed HTML down to 221.5 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: ~2.0 TB of raw gzipped WARCs becomes **70.2 GB of Parquet** — a **96.6% total reduction** — containing 49,242,846 clean markdown documents.
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### Processing Times
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Pipeline timings across 2541 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 219h 28m 33s avg 5m 10s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 12h 57m 19s avg 18s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 56h 40m 12s avg 1m 20s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 19h 19m 17s avg 27s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/05181.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:f05e8d76dbfccc148e165e51dd9778c8716559e10b3c96fb8f62981117cf693a
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size 29540093
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data/CC-MAIN-2026-08/05657.parquet
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version https://git-lfs.github.com/spec/v1
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size 28892663
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data/CC-MAIN-2026-08/06163.parquet
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version https://git-lfs.github.com/spec/v1
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size 27548138
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stats.csv
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@@ -1680,6 +1680,7 @@ CC-MAIN-2026-08,5177,19459,2567873093,90620270,28856616,2026-03-14T17:02:48Z,224
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CC-MAIN-2026-08,5178,19545,2605531439,93890256,29444387,2026-03-14T17:07:21Z,234,0,38,53
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| 1683 |
CC-MAIN-2026-08,5243,19893,2626328731,92220655,29208053,2026-03-14T01:06:34Z,191,0,29,18
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CC-MAIN-2026-08,5245,19207,2511351197,90003358,28938970,2026-03-14T01:19:12Z,193,0,22,0
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@@ -2032,6 +2033,7 @@ CC-MAIN-2026-08,5653,19654,2603298676,97270159,30312632,2026-03-14T17:01:29Z,259
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CC-MAIN-2026-08,5654,19772,2626846707,98354434,31092319,2026-03-14T17:06:11Z,274,0,59,34
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CC-MAIN-2026-08,5752,19419,2563830903,92043031,29138030,2026-03-14T01:06:35Z,563,0,128,18
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@@ -2537,4 +2540,4 @@ CC-MAIN-2026-08,6406,19384,2542661384,94780678,30835494,2026-03-14T17:01:29Z,249
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CC-MAIN-2026-08,6410,19355,2548798045,94930311,30386895,2026-03-14T17:23:18Z,264,0,73,
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CC-MAIN-2026-08,5243,19893,2626328731,92220655,29208053,2026-03-14T01:06:34Z,191,0,29,18
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