Publish shard CC-MAIN-2026-08/01032
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/01032.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 **17,
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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) | ~
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| HTML extracted (uncompressed) | 2.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~38.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 25.7 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 2.2 TB of uncompressed HTML down to 80.
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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 59h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 4h 47m 46s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 13h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 40m 15s 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 **17,944,824 documents across 927 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 927 files of CC-MAIN-2026-08 (17,944,824 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 927 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~751.4 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~38.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 25.7 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 2.2 TB of uncompressed HTML down to 80.9 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: ~751.4 GB of raw gzipped WARCs becomes **25.7 GB of Parquet** — a **96.6% total reduction** — containing 17,944,824 clean markdown documents.
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### Processing Times
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Pipeline timings across 927 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 59h 46m 42s avg 3m 52s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 4h 47m 46s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 13h 42m 4s avg 53s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 40m 15s avg 25s
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```
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data/CC-MAIN-2026-08/01032.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:c02401462d24570acd0beefcb6633ba98cecc4b3a1ead46ef5318b67a38be0e3
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size 29642029
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stats.csv
CHANGED
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@@ -576,6 +576,7 @@ CC-MAIN-2026-08,1028,19557,2589891377,92034631,28857038,2026-03-13T20:42:40Z,429
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CC-MAIN-2026-08,1029,19460,2551984186,97459661,30396446,2026-03-13T20:54:20Z,466,0,257,27
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| 577 |
CC-MAIN-2026-08,1030,19247,2558833125,96074881,29425772,2026-03-13T21:03:11Z,436,0,110,15
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| 578 |
CC-MAIN-2026-08,1031,19554,2596685957,92102067,29412905,2026-03-13T21:13:11Z,425,0,175,24
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| 579 |
CC-MAIN-2026-08,1101,19721,2641197765,95719568,30240239,2026-03-13T09:59:33Z,564,0,296,0
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CC-MAIN-2026-08,1102,19562,2608129691,99280759,31748974,2026-03-13T10:28:07Z,1518,0,191,0
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CC-MAIN-2026-08,1103,19270,2517580674,89253461,28361470,2026-03-13T10:55:39Z,1380,0,268,0
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CC-MAIN-2026-08,1029,19460,2551984186,97459661,30396446,2026-03-13T20:54:20Z,466,0,257,27
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CC-MAIN-2026-08,1030,19247,2558833125,96074881,29425772,2026-03-13T21:03:11Z,436,0,110,15
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| 578 |
CC-MAIN-2026-08,1031,19554,2596685957,92102067,29412905,2026-03-13T21:13:11Z,425,0,175,24
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CC-MAIN-2026-08,1032,19411,2577154917,95600845,29642029,2026-03-13T21:25:11Z,457,0,261,0
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CC-MAIN-2026-08,1101,19721,2641197765,95719568,30240239,2026-03-13T09:59:33Z,564,0,296,0
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| 581 |
CC-MAIN-2026-08,1102,19562,2608129691,99280759,31748974,2026-03-13T10:28:07Z,1518,0,191,0
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| 582 |
CC-MAIN-2026-08,1103,19270,2517580674,89253461,28361470,2026-03-13T10:55:39Z,1380,0,268,0
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