Publish shard CC-MAIN-2026-08/00047
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00047.parquet +3 -0
- stats.csv +4 -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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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~
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| HTML extracted (uncompressed) |
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| Packed markdown WARC (.md.warc.gz) | ~4.
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| Final Parquet (Zstd level 19) | 2.9 GB | ~2.9 TB | **-31.8%** 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: ~
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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 3h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 9s
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Export (Parquet) ████
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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 **2,079,791 documents across 106 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 106 files of CC-MAIN-2026-08 (2,079,791 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 106 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~85.9 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 258.2 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~4.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 2.9 GB | ~2.9 TB | **-31.8%** 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 258.2 GB of uncompressed HTML down to 9.2 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: ~85.9 GB of raw gzipped WARCs becomes **2.9 GB of Parquet** — a **96.6% total reduction** — containing 2,079,791 clean markdown documents.
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### Processing Times
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Pipeline timings across 106 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 3h 33m 6s avg 2m 0s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 9s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 43m 9s avg 24s
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Publish (HuggingFace) ███████░░░░░░░░░░░░░░░░░ total 1h 9m 47s avg 39s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00047.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:a0384513eea7e0d214c276bcf175cb74670e5ad3d4a1fa5968558cd728e99201
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size 30141571
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stats.csv
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@@ -46,6 +46,7 @@ CC-MAIN-2026-08,43,19406,2577750172,93559201,30417539,2026-03-13T07:05:57Z,237,0
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CC-MAIN-2026-08,44,19268,2543453471,92880103,29438620,2026-03-13T07:09:04Z,132,0,25,29
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CC-MAIN-2026-08,45,19591,2583724703,93824689,30465272,2026-03-13T07:13:09Z,175,0,32,36
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CC-MAIN-2026-08,46,19497,2587172839,93962075,30171609,2026-03-13T07:16:54Z,156,0,24,42
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CC-MAIN-2026-08,102,19438,2568537422,97402434,31137610,2026-03-13T06:42:52Z,93,0,20,52
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CC-MAIN-2026-08,103,19511,2593312947,96164480,30296223,2026-03-13T06:47:48Z,187,0,46,61
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CC-MAIN-2026-08,107,19477,2610750800,97990183,30876795,2026-03-13T07:11:08Z,203,0,34,29
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CC-MAIN-2026-08,108,19400,2604607711,92680586,29321154,2026-03-13T07:15:10Z,157,0,26,57
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CC-MAIN-2026-08,109,19487,2556703136,91883241,29188577,2026-03-13T07:19:05Z,164,0,26,43
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CC-MAIN-2026-08,253,19312,2557230855,96017199,30399966,2026-03-13T06:51:42Z,130,0,23,117
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CC-MAIN-2026-08,553,19856,2617133708,99106486,30365588,2026-03-13T06:52:51Z,116,0,23,120
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CC-MAIN-2026-08,46,19497,2587172839,93962075,30171609,2026-03-13T07:16:54Z,156,0,24,42
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