Publish 2 shards CC-MAIN-2026-08/02582–03085
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/02582.parquet +3 -0
- data/CC-MAIN-2026-08/03085.parquet +3 -0
- stats.csv +4 -2
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 **13,
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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) | 1.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~29.
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| Final Parquet (Zstd level 19) | 19.8 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 1.7 TB of uncompressed HTML down to 62.
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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 38h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 9s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 26m
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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 **13,839,316 documents across 716 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 716 files of CC-MAIN-2026-08 (13,839,316 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 716 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~580.4 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~29.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 19.8 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 1.7 TB of uncompressed HTML down to 62.4 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: ~580.4 GB of raw gzipped WARCs becomes **19.8 GB of Parquet** — a **96.6% total reduction** — containing 13,839,316 clean markdown documents.
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### Processing Times
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Pipeline timings across 716 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 38h 34m 53s avg 3m 13s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 9s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h 31m 52s avg 42s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 26m 57s avg 27s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/02582.parquet
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version https://git-lfs.github.com/spec/v1
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size 31148205
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data/CC-MAIN-2026-08/03085.parquet
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version https://git-lfs.github.com/spec/v1
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size 30731109
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stats.csv
CHANGED
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@@ -603,7 +603,7 @@ CC-MAIN-2026-08,1927,19721,2624331172,94060645,30204608,2026-03-13T15:02:26Z,397
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@@ -627,7 +627,7 @@ CC-MAIN-2026-08,2120,19764,2596402154,95289784,29734904,2026-03-13T13:45:11Z,156
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@@ -671,6 +671,7 @@ CC-MAIN-2026-08,2578,15247,1920720864,76356451,23862960,2026-03-13T15:08:18Z,186
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@@ -710,6 +711,7 @@ CC-MAIN-2026-08,3081,19402,2618475303,94037032,28941954,2026-03-13T14:53:30Z,450
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