Publish shard CC-MAIN-2026-08/05783
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/05783.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 **25,
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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) | ~1.1 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 3.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~55.
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| Final Parquet (Zstd level 19) | 37.2 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 3.1 TB of uncompressed HTML down to 117.
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End to end: ~1.1 TB of raw gzipped WARCs becomes **37.2 GB of Parquet** — a **96.6% total reduction** — containing 25,
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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 98h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 16m 42s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 24h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 8h 27m 14s avg 22s
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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 **25,991,066 documents across 1343 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 1343 files of CC-MAIN-2026-08 (25,991,066 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1343 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~1.1 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 3.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~55.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 37.2 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 3.1 TB of uncompressed HTML down to 117.2 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: ~1.1 TB of raw gzipped WARCs becomes **37.2 GB of Parquet** — a **96.6% total reduction** — containing 25,991,066 clean markdown documents.
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### Processing Times
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Pipeline timings across 1343 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 98h 23m 26s avg 4m 23s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 16m 42s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 24h 7m 3s avg 1m 4s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 8h 27m 14s avg 22s
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```
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data/CC-MAIN-2026-08/05783.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:ba03894db30cf4e40df57ff60f8d400dd3baf39eb528d9a5bbf710e911f14fb4
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size 30207833
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stats.csv
CHANGED
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@@ -1290,6 +1290,7 @@ CC-MAIN-2026-08,5779,19329,2579090993,92810444,29348971,2026-03-14T03:10:35Z,344
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| 1290 |
CC-MAIN-2026-08,5780,19203,2555185625,93602842,28525380,2026-03-14T03:18:15Z,384,0,79,29
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| 1291 |
CC-MAIN-2026-08,5781,19516,2575624984,92737564,30217298,2026-03-14T03:25:27Z,332,0,86,12
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| 1292 |
CC-MAIN-2026-08,5782,19519,2594852034,94086352,29067621,2026-03-14T03:31:57Z,306,0,98,2
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| 1293 |
CC-MAIN-2026-08,5992,19427,2553319561,93689821,30257425,2026-03-14T01:06:35Z,197,0,31,18
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| 1294 |
CC-MAIN-2026-08,5993,19504,2561761288,95284868,30935071,2026-03-14T01:19:12Z,205,0,28,9
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| 1295 |
CC-MAIN-2026-08,5994,19299,2541522096,89680113,28640562,2026-03-14T01:19:12Z,206,0,21,9
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| 1290 |
CC-MAIN-2026-08,5780,19203,2555185625,93602842,28525380,2026-03-14T03:18:15Z,384,0,79,29
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| 1291 |
CC-MAIN-2026-08,5781,19516,2575624984,92737564,30217298,2026-03-14T03:25:27Z,332,0,86,12
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| 1292 |
CC-MAIN-2026-08,5782,19519,2594852034,94086352,29067621,2026-03-14T03:31:57Z,306,0,98,2
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+
CC-MAIN-2026-08,5783,19614,2615702632,96063303,30207833,2026-03-14T03:39:52Z,395,0,73,0
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| 1294 |
CC-MAIN-2026-08,5992,19427,2553319561,93689821,30257425,2026-03-14T01:06:35Z,197,0,31,18
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| 1295 |
CC-MAIN-2026-08,5993,19504,2561761288,95284868,30935071,2026-03-14T01:19:12Z,205,0,28,9
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| 1296 |
CC-MAIN-2026-08,5994,19299,2541522096,89680113,28640562,2026-03-14T01:19:12Z,206,0,21,9
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