Publish shard CC-MAIN-2026-08/01596
Browse files- README.md +8 -8
- data/CC-MAIN-2026-08/01596.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 **
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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) | 5.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~101.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 68.5 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 5.8 TB of uncompressed HTML down to
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End to end: ~2.0 TB of raw gzipped WARCs becomes **68.5 GB of Parquet** — a **96.6% total reduction** — containing
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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
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 12h 57m 19s avg 18s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 55h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 41m 5s 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 **48,016,944 documents across 2478 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 2478 files of CC-MAIN-2026-08 (48,016,944 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 2478 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) | 5.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~101.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 68.5 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 5.8 TB of uncompressed HTML down to 216.0 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 **68.5 GB of Parquet** — a **96.6% total reduction** — containing 48,016,944 clean markdown documents.
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### Processing Times
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Pipeline timings across 2478 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 215h 0m 5s avg 5m 12s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 12h 57m 19s avg 18s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 55h 27m 38s avg 1m 20s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 41m 5s avg 25s
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```
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data/CC-MAIN-2026-08/01596.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:25950a9192110aa7cf656c60261aed7ad4d9c5dcee87fc8c3fbdabf01181dcb5
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size 28501800
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stats.csv
CHANGED
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@@ -1289,6 +1289,7 @@ CC-MAIN-2026-08,1592,19523,2578205198,98560558,31078365,2026-03-14T16:35:59Z,550
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| 1289 |
CC-MAIN-2026-08,1593,19470,2570746590,95127149,30237697,2026-03-14T16:44:08Z,454,0,53,41
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| 1290 |
CC-MAIN-2026-08,1594,19489,2587369923,93013488,29494120,2026-03-14T16:53:08Z,489,0,62,26
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| 1291 |
CC-MAIN-2026-08,1595,19336,2556852293,94845310,29492260,2026-03-14T17:02:38Z,533,0,24,20
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| 1292 |
CC-MAIN-2026-08,1601,19488,2581638297,95520157,30384219,2026-03-13T09:59:33Z,582,0,278,0
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| 1293 |
CC-MAIN-2026-08,1602,19483,2565678793,94359979,29292971,2026-03-13T10:27:25Z,1527,0,141,0
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| 1294 |
CC-MAIN-2026-08,1603,19263,2551028375,92915325,29206149,2026-03-13T10:55:50Z,1379,0,324,0
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| 1289 |
CC-MAIN-2026-08,1593,19470,2570746590,95127149,30237697,2026-03-14T16:44:08Z,454,0,53,41
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| 1290 |
CC-MAIN-2026-08,1594,19489,2587369923,93013488,29494120,2026-03-14T16:53:08Z,489,0,62,26
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| 1291 |
CC-MAIN-2026-08,1595,19336,2556852293,94845310,29492260,2026-03-14T17:02:38Z,533,0,24,20
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+
CC-MAIN-2026-08,1596,19631,2604515391,90324522,28501800,2026-03-14T17:09:42Z,356,0,65,0
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| 1293 |
CC-MAIN-2026-08,1601,19488,2581638297,95520157,30384219,2026-03-13T09:59:33Z,582,0,278,0
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| 1294 |
CC-MAIN-2026-08,1602,19483,2565678793,94359979,29292971,2026-03-13T10:27:25Z,1527,0,141,0
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| 1295 |
CC-MAIN-2026-08,1603,19263,2551028375,92915325,29206149,2026-03-13T10:55:50Z,1379,0,324,0
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