Publish shard CC-MAIN-2026-08/01339
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/01339.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 **26,
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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) | 3.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~56.
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| Final Parquet (Zstd level 19) | 37.
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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 3.2 TB of uncompressed HTML down to 119.
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End to end: ~1.1 TB of raw gzipped WARCs becomes **37.
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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 105h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 49m 11s avg 20s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 26h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 8h 23m 0s 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 **26,455,077 documents across 1368 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 1368 files of CC-MAIN-2026-08 (26,455,077 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1368 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~1.1 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 3.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~56.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 37.9 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 3.2 TB of uncompressed HTML down to 119.3 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 **37.9 GB of Parquet** — a **96.6% total reduction** — containing 26,455,077 clean markdown documents.
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### Processing Times
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Pipeline timings across 1368 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 105h 46m 30s avg 4m 38s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 49m 11s avg 20s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 26h 6m 58s avg 1m 8s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 8h 23m 0s avg 22s
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```
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data/CC-MAIN-2026-08/01339.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 sha256:560b65c0b36183bc21be52d91365f33ca07a2e71d6b993b8e885180d8bc9287c
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size 30736240
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stats.csv
CHANGED
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@@ -911,6 +911,7 @@ CC-MAIN-2026-08,1335,19445,2547826342,94548063,29547506,2026-03-14T03:19:19Z,483
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| 911 |
CC-MAIN-2026-08,1336,19440,2570626453,93069186,29226498,2026-03-14T03:32:28Z,676,0,145,25
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| 912 |
CC-MAIN-2026-08,1337,19745,2608657474,95214137,30001998,2026-03-14T03:42:23Z,383,0,206,16
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| 913 |
CC-MAIN-2026-08,1338,19330,2586714698,97658016,30134122,2026-03-14T03:52:29Z,545,0,36,15
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| 914 |
CC-MAIN-2026-08,1401,19441,2586676962,94334130,29606093,2026-03-13T09:50:34Z,230,0,90,0
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| 915 |
CC-MAIN-2026-08,1402,19641,2571912489,94392153,29376558,2026-03-13T10:21:08Z,1035,0,797,0
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| 916 |
CC-MAIN-2026-08,1403,19445,2589553842,99835858,31697837,2026-03-13T10:51:00Z,1248,0,530,0
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| 911 |
CC-MAIN-2026-08,1336,19440,2570626453,93069186,29226498,2026-03-14T03:32:28Z,676,0,145,25
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| 912 |
CC-MAIN-2026-08,1337,19745,2608657474,95214137,30001998,2026-03-14T03:42:23Z,383,0,206,16
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| 913 |
CC-MAIN-2026-08,1338,19330,2586714698,97658016,30134122,2026-03-14T03:52:29Z,545,0,36,15
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| 914 |
+
CC-MAIN-2026-08,1339,19602,2578543129,95441204,30736240,2026-03-14T03:59:05Z,306,0,117,0
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| 915 |
CC-MAIN-2026-08,1401,19441,2586676962,94334130,29606093,2026-03-13T09:50:34Z,230,0,90,0
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| 916 |
CC-MAIN-2026-08,1402,19641,2571912489,94392153,29376558,2026-03-13T10:21:08Z,1035,0,797,0
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| 917 |
CC-MAIN-2026-08,1403,19445,2589553842,99835858,31697837,2026-03-13T10:51:00Z,1248,0,530,0
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