Publish shard CC-MAIN-2026-08/01774
Browse files- README.md +8 -8
- data/CC-MAIN-2026-08/01774.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 **55,
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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) | ~2.3 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 6.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~117.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 79.1 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 6.7 TB of uncompressed HTML down to 249.
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End to end: ~2.3 TB of raw gzipped WARCs becomes **79.1 GB of Parquet** — a **96.6% total reduction** — containing 55,
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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 258h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 13h 28m 50s avg 16s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 66h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 20h 29m 21s avg 25s
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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 **55,466,916 documents across 2862 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 2862 files of CC-MAIN-2026-08 (55,466,916 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 2862 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~2.3 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 6.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~117.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 79.1 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 6.7 TB of uncompressed HTML down to 249.6 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: ~2.3 TB of raw gzipped WARCs becomes **79.1 GB of Parquet** — a **96.6% total reduction** — containing 55,466,916 clean markdown documents.
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### Processing Times
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Pipeline timings across 2862 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 258h 36m 59s avg 5m 25s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 13h 28m 50s avg 16s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 66h 57m 57s avg 1m 24s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 20h 29m 21s avg 25s
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```
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data/CC-MAIN-2026-08/01774.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:29e8793a777232b3d969ebb1d965f2988c5c478fa0b1216e0dad527b3741e700
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size 31386470
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stats.csv
CHANGED
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@@ -1572,6 +1572,7 @@ CC-MAIN-2026-08,1770,19426,2604921471,96601535,30110205,2026-03-15T00:05:00Z,118
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CC-MAIN-2026-08,1771,19342,2551248126,95207243,29927726,2026-03-15T00:15:23Z,469,0,147,29
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| 1573 |
CC-MAIN-2026-08,1772,19696,2601486689,91515164,29120466,2026-03-15T00:25:45Z,505,0,118,15
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| 1574 |
CC-MAIN-2026-08,1773,19453,2570716384,94913848,30320736,2026-03-15T00:37:08Z,435,0,252,18
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| 1575 |
CC-MAIN-2026-08,1801,19437,2573915480,93218254,30047553,2026-03-13T10:00:55Z,409,0,121,0
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| 1576 |
CC-MAIN-2026-08,1802,19645,2589675164,95814459,30042225,2026-03-13T10:11:53Z,424,0,233,0
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| 1577 |
CC-MAIN-2026-08,1803,19583,2597232437,94155966,29485837,2026-03-13T10:25:52Z,799,0,38,0
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| 1572 |
CC-MAIN-2026-08,1771,19342,2551248126,95207243,29927726,2026-03-15T00:15:23Z,469,0,147,29
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| 1573 |
CC-MAIN-2026-08,1772,19696,2601486689,91515164,29120466,2026-03-15T00:25:45Z,505,0,118,15
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| 1574 |
CC-MAIN-2026-08,1773,19453,2570716384,94913848,30320736,2026-03-15T00:37:08Z,435,0,252,18
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+
CC-MAIN-2026-08,1774,19758,2627124918,97539945,31386470,2026-03-15T00:48:38Z,473,0,215,0
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| 1576 |
CC-MAIN-2026-08,1801,19437,2573915480,93218254,30047553,2026-03-13T10:00:55Z,409,0,121,0
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| 1577 |
CC-MAIN-2026-08,1802,19645,2589675164,95814459,30042225,2026-03-13T10:11:53Z,424,0,233,0
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| 1578 |
CC-MAIN-2026-08,1803,19583,2597232437,94155966,29485837,2026-03-13T10:25:52Z,799,0,38,0
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