Publish shard CC-MAIN-2026-08/00037
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00037.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) | ~30.
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| HTML extracted (uncompressed) |
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| Packed markdown WARC (.md.warc.gz) | ~1.5 GB | ~3.7 TB | **-98.4%** vs HTML |
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| Final Parquet (Zstd level 19) | 1.0 GB | ~2.9 TB | **-31.
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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
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End to end: ~30.
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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 — avg —
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Convert (HTML → MD) ████████████████████████ total
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 3m
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Publish (HuggingFace) ████░░░░░░░░░░░░░░░░░░░░ total 2m
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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 **757,087 documents across 38 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 38 files of CC-MAIN-2026-08 (757,087 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 38 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~30.8 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 95.0 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~1.5 GB | ~3.7 TB | **-98.4%** vs HTML |
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| Final Parquet (Zstd level 19) | 1.0 GB | ~2.9 TB | **-31.2%** 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 95.0 GB of uncompressed HTML down to 3.2 GB of markdown — a **98.4% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 67.7%.
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End to end: ~30.8 GB of raw gzipped WARCs becomes **1.0 GB of Parquet** — a **96.7% total reduction** — containing 757,087 clean markdown documents.
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### Processing Times
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Pipeline timings across 38 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ░░░░░░░░░░░░░░░░░░░░░░░░ total — avg —
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Convert (HTML → MD) ████████████████████████ total 16m 2s avg 25s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 3m 46s avg 5s
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Publish (HuggingFace) ████░░░░░░░░░░░░░░░░░░░░ total 2m 47s avg 4s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00037.parquet
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@@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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oid sha256:c2be1358bb812b3f942e256485aa10fe0eb5580149ed153a74f47efdf2aeec9d
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size 29807147
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stats.csv
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crawl_id,file_idx,rows,html_bytes,md_bytes,parquet_bytes,created_at,dur_download_s,dur_convert_s,dur_export_s,dur_publish_s
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-
CC-MAIN-2026-08,0,19498,2584731228,94933501,30351193,2026-03-13T06:
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CC-MAIN-2026-08,1,21265,2961325911,80724752,27223981,2026-03-13T05:45:52Z,0,0,0,2
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CC-MAIN-2026-08,2,21141,2920084882,77766365,26580896,2026-03-13T05:45:58Z,0,0,0,3
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CC-MAIN-2026-08,3,21086,2959834291,80424489,26785716,2026-03-13T05:46:05Z,0,0,0,4
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CC-MAIN-2026-08,34,19325,2535567258,94812059,30450886,2026-03-13T06:05:00Z,0,115,17,3
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CC-MAIN-2026-08,35,19398,2565260259,94010975,30284205,2026-03-13T06:06:37Z,0,72,17,3
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CC-MAIN-2026-08,36,19367,2577531843,94004962,29843828,2026-03-13T06:08:12Z,0,69,18,2
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crawl_id,file_idx,rows,html_bytes,md_bytes,parquet_bytes,created_at,dur_download_s,dur_convert_s,dur_export_s,dur_publish_s
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CC-MAIN-2026-08,0,19498,2584731228,94933501,30351193,2026-03-13T06:28:03Z,0,0,0,4
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CC-MAIN-2026-08,1,21265,2961325911,80724752,27223981,2026-03-13T05:45:52Z,0,0,0,2
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CC-MAIN-2026-08,2,21141,2920084882,77766365,26580896,2026-03-13T05:45:58Z,0,0,0,3
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CC-MAIN-2026-08,3,21086,2959834291,80424489,26785716,2026-03-13T05:46:05Z,0,0,0,4
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CC-MAIN-2026-08,34,19325,2535567258,94812059,30450886,2026-03-13T06:05:00Z,0,115,17,3
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CC-MAIN-2026-08,35,19398,2565260259,94010975,30284205,2026-03-13T06:06:37Z,0,72,17,3
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CC-MAIN-2026-08,36,19367,2577531843,94004962,29843828,2026-03-13T06:08:12Z,0,69,18,2
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CC-MAIN-2026-08,37,19314,2558501740,95109133,29807147,2026-03-13T06:36:17Z,0,63,19,0
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