Publish shard CC-MAIN-2026-08/06410
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/06410.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 **49,
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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) | ~2.0 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 5.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~
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| Final Parquet (Zstd level 19) | 70.1 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 5.9 TB of uncompressed HTML down to 221.
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End to end: ~2.0 TB of raw gzipped WARCs becomes **70.1 GB of Parquet** — a **96.6% total reduction** — containing 49,
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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 219h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 12h 57m 19s avg 18s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 56h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 19h
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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 **49,184,555 documents across 2538 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 2538 files of CC-MAIN-2026-08 (49,184,555 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 2538 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~2.0 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 5.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~104.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 70.1 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 5.9 TB of uncompressed HTML down to 221.2 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 68.3%.
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End to end: ~2.0 TB of raw gzipped WARCs becomes **70.1 GB of Parquet** — a **96.6% total reduction** — containing 49,184,555 clean markdown documents.
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### Processing Times
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Pipeline timings across 2538 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 219h 13m 31s avg 5m 10s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 12h 57m 19s avg 18s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 56h 37m 30s avg 1m 20s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 19h 18m 16s avg 27s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/06410.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:5e34fb83382a8fe437c0996e8e37cf9d0bf3c954a6993bd7a14fbd1d07105eca
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size 30386895
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stats.csv
CHANGED
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@@ -2205,7 +2205,7 @@ CC-MAIN-2026-08,5919,19368,2585943415,98858769,30751616,2026-03-14T17:00:36Z,262
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CC-MAIN-2026-08,5920,19183,2492222224,92123793,28707175,2026-03-14T17:06:11Z,288,0,53,34
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| 2206 |
CC-MAIN-2026-08,5921,19622,2597268848,98333770,30939475,2026-03-14T17:11:13Z,228,0,82,13
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| 2207 |
CC-MAIN-2026-08,5922,19503,2556254241,94888504,29563254,2026-03-14T17:15:49Z,227,0,67,49
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-
CC-MAIN-2026-08,5923,19405,2596928779,95639448,30306383,2026-03-14T17:21:40Z,239,0,41,
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CC-MAIN-2026-08,5992,19427,2553319561,93689821,30257425,2026-03-14T01:06:35Z,197,0,31,18
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| 2210 |
CC-MAIN-2026-08,5993,19504,2561761288,95284868,30935071,2026-03-14T01:19:12Z,205,0,28,0
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| 2211 |
CC-MAIN-2026-08,5994,19299,2541522096,89680113,28640562,2026-03-14T01:19:12Z,206,0,21,0
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CC-MAIN-2026-08,6407,19372,2588362401,88540285,28499419,2026-03-14T17:07:21Z,267,0,56,53
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| 2538 |
CC-MAIN-2026-08,6408,19474,2581632506,90742834,28736783,2026-03-14T17:12:19Z,290,0,52,55
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| 2539 |
CC-MAIN-2026-08,6409,19308,2554804646,96544205,29996046,2026-03-14T17:18:22Z,268,0,57,30
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CC-MAIN-2026-08,5920,19183,2492222224,92123793,28707175,2026-03-14T17:06:11Z,288,0,53,34
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| 2206 |
CC-MAIN-2026-08,5921,19622,2597268848,98333770,30939475,2026-03-14T17:11:13Z,228,0,82,13
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| 2207 |
CC-MAIN-2026-08,5922,19503,2556254241,94888504,29563254,2026-03-14T17:15:49Z,227,0,67,49
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| 2208 |
+
CC-MAIN-2026-08,5923,19405,2596928779,95639448,30306383,2026-03-14T17:21:40Z,239,0,41,32
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| 2209 |
CC-MAIN-2026-08,5992,19427,2553319561,93689821,30257425,2026-03-14T01:06:35Z,197,0,31,18
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| 2210 |
CC-MAIN-2026-08,5993,19504,2561761288,95284868,30935071,2026-03-14T01:19:12Z,205,0,28,0
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| 2211 |
CC-MAIN-2026-08,5994,19299,2541522096,89680113,28640562,2026-03-14T01:19:12Z,206,0,21,0
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| 2537 |
CC-MAIN-2026-08,6407,19372,2588362401,88540285,28499419,2026-03-14T17:07:21Z,267,0,56,53
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| 2538 |
CC-MAIN-2026-08,6408,19474,2581632506,90742834,28736783,2026-03-14T17:12:19Z,290,0,52,55
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| 2539 |
CC-MAIN-2026-08,6409,19308,2554804646,96544205,29996046,2026-03-14T17:18:22Z,268,0,57,30
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| 2540 |
+
CC-MAIN-2026-08,6410,19355,2548798045,94930311,30386895,2026-03-14T17:23:18Z,264,0,73,0
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