Publish shard CC-MAIN-2026-08/00714
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00714.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 **2,
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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) | ~98.
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| HTML extracted (uncompressed) |
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| Packed markdown WARC (.md.warc.gz) | ~
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| Final Parquet (Zstd level 19) | 3.4 GB | ~2.9 TB | **-31.9%** 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
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End to end: ~98.
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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 4h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 7s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total
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Publish (HuggingFace) ███████░░░░░░░░░░░░░░░░
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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 **2,391,329 documents across 122 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 122 files of CC-MAIN-2026-08 (2,391,329 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 122 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~98.9 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 296.6 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~5.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 3.4 GB | ~2.9 TB | **-31.9%** 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 296.6 GB of uncompressed HTML down to 10.6 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 68.0%.
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End to end: ~98.9 GB of raw gzipped WARCs becomes **3.4 GB of Parquet** — a **96.6% total reduction** — containing 2,391,329 clean markdown documents.
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### Processing Times
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Pipeline timings across 122 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 4h 6m 14s avg 2m 1s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 7s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 50m 6s avg 24s
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Publish (HuggingFace) ████████░░░░░░░░░░░░░░░░ total 1h 23m 27s avg 41s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00714.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:15ef0b2611681cc63562417eeb60f59f1c3726c287999e4eebe7cf9844f02f73
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size 30740910
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stats.csv
CHANGED
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@@ -73,6 +73,7 @@ CC-MAIN-2026-08,260,19334,2553916248,92962972,29646143,2026-03-13T07:22:01Z,284,
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CC-MAIN-2026-08,261,19637,2584855305,96241876,32062389,2026-03-13T07:25:30Z,139,0,25,42
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CC-MAIN-2026-08,262,19342,2556139647,91304795,28470338,2026-03-13T07:28:17Z,136,0,23,7
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CC-MAIN-2026-08,263,19704,2599536323,94011169,29652032,2026-03-13T07:32:21Z,124,0,35,83
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CC-MAIN-2026-08,401,19517,2605589961,95609438,30404753,2026-03-13T06:41:08Z,218,0,47,107
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30588984,2026-03-13T06:43:58Z,98,0,26,44
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29375992,2026-03-13T06:49:29Z,198,0,33,98
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CC-MAIN-2026-08,860,19579,2621603372,97234729,30832377,2026-03-13T07:22:32Z,272,0,37,44
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CC-MAIN-2026-08,861,19490,2569643917,90715876,29081843,2026-03-13T07:25:26Z,115,0,24,32
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CC-MAIN-2026-08,862,19535,2608751766,96008732,30532163,2026-03-13T07:28:35Z,129,0,28,30
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CC-MAIN-2026-08,863,19545,2590081820,92582175,29356410,2026-03-13T07:
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CC-MAIN-2026-08,261,19637,2584855305,96241876,32062389,2026-03-13T07:25:30Z,139,0,25,42
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CC-MAIN-2026-08,262,19342,2556139647,91304795,28470338,2026-03-13T07:28:17Z,136,0,23,7
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CC-MAIN-2026-08,263,19704,2599536323,94011169,29652032,2026-03-13T07:32:21Z,124,0,35,83
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CC-MAIN-2026-08,264,19509,2596140017,96135571,30432948,2026-03-13T07:34:09Z,85,0,22,0
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CC-MAIN-2026-08,401,19517,2605589961,95609438,30404753,2026-03-13T06:41:08Z,218,0,47,107
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30588984,2026-03-13T06:43:58Z,98,0,26,44
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29375992,2026-03-13T06:49:29Z,198,0,33,98
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CC-MAIN-2026-08,860,19579,2621603372,97234729,30832377,2026-03-13T07:22:32Z,272,0,37,44
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| 121 |
CC-MAIN-2026-08,861,19490,2569643917,90715876,29081843,2026-03-13T07:25:26Z,115,0,24,32
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| 122 |
CC-MAIN-2026-08,862,19535,2608751766,96008732,30532163,2026-03-13T07:28:35Z,129,0,28,30
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+
CC-MAIN-2026-08,863,19545,2590081820,92582175,29356410,2026-03-13T07:34:02Z,131,0,28,164
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