Publish shard CC-MAIN-2026-08/01932
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/01932.parquet +3 -0
- stats.csv +3 -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) | 20.0 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 1.7 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 39h
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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 27m
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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 **13,955,758 documents across 722 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 722 files of CC-MAIN-2026-08 (13,955,758 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 722 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~585.2 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) | ~29.6 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 20.0 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 1.7 TB of uncompressed HTML down to 62.9 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: ~585.2 GB of raw gzipped WARCs becomes **20.0 GB of Parquet** — a **96.6% total reduction** — containing 13,955,758 clean markdown documents.
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### Processing Times
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Pipeline timings across 722 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 39h 18m 28s avg 3m 15s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 9s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h 37m 4s avg 42s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 27m 55s avg 27s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/01932.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:e72f4ee23e777dd6d84a57e2217da1a3798ee9ec37f0695de26d193204254d46
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size 29242281
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stats.csv
CHANGED
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@@ -606,6 +606,7 @@ CC-MAIN-2026-08,1928,19808,2612197762,95404218,29824046,2026-03-13T15:08:51Z,243
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@@ -690,7 +691,7 @@ CC-MAIN-2026-08,2819,19436,2574580835,91183036,29202370,2026-03-13T14:58:53Z,371
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@@ -716,7 +717,7 @@ CC-MAIN-2026-08,3082,19480,2614688097,92409735,29723123,2026-03-13T15:09:35Z,298
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