Publish shard CC-MAIN-2026-08/00169
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/00169.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 **14,
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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) | ~
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| HTML extracted (uncompressed) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~31.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.2 GB | ~2.9 TB | **-32.4%** 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 1.8 TB of uncompressed HTML down to 66.
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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 39h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 43m 46s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 58m
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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 **14,796,781 documents across 764 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 764 files of CC-MAIN-2026-08 (14,796,781 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 764 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~619.3 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~31.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.2 GB | ~2.9 TB | **-32.4%** 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 1.8 TB of uncompressed HTML down to 66.7 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 68.2%.
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End to end: ~619.3 GB of raw gzipped WARCs becomes **21.2 GB of Parquet** — a **96.6% total reduction** — containing 14,796,781 clean markdown documents.
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### Processing Times
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Pipeline timings across 764 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 39h 26m 38s avg 3m 5s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 43m 46s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h 19m 6s avg 39s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 58m 38s avg 28s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00169.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:71fb516cedb7c002b2728c98d4f56b7be55b67c833cf3ee0e9ed954b8c0c55d7
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size 31173231
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stats.csv
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@@ -165,6 +165,7 @@ CC-MAIN-2026-08,165,19371,2592239019,93565408,30073152,2026-03-13T16:19:31Z,269,
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CC-MAIN-2026-08,166,19231,2554582755,91441038,28927887,2026-03-13T16:23:46Z,202,0,48,87
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CC-MAIN-2026-08,167,19479,2608667162,97765916,30323458,2026-03-13T16:28:01Z,199,0,56,79
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CC-MAIN-2026-08,168,19507,2562143602,99496569,32117485,2026-03-13T16:31:16Z,150,0,46,63
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CC-MAIN-2026-08,251,19610,2594898345,97558492,31917087,2026-03-13T06:42:12Z,277,0,23,136
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CC-MAIN-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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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-2026-08,1152,19357,2526942831,94408201,29830533,2026-03-13T16:20:57Z,252,0,26,8
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CC-MAIN-2026-08,1153,19544,2587908586,93445289,29549515,2026-03-13T16:25:14Z,234,0,26,77
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CC-MAIN-2026-08,1154,19537,2653924384,95165523,31029731,2026-03-13T16:29:21Z,234,0,28,10
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CC-MAIN-2026-08,1155,19471,2591973632,93888598,29591042,2026-03-13T16:32:21Z,171,0,25,
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CC-MAIN-2026-08,166,19231,2554582755,91441038,28927887,2026-03-13T16:23:46Z,202,0,48,87
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CC-MAIN-2026-08,167,19479,2608667162,97765916,30323458,2026-03-13T16:28:01Z,199,0,56,79
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CC-MAIN-2026-08,168,19507,2562143602,99496569,32117485,2026-03-13T16:31:16Z,150,0,46,63
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CC-MAIN-2026-08,169,19473,2563389563,95532787,31173231,2026-03-13T16:34:31Z,153,0,41,0
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CC-MAIN-2026-08,251,19610,2594898345,97558492,31917087,2026-03-13T06:42:12Z,277,0,23,136
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CC-MAIN-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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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-2026-08,1152,19357,2526942831,94408201,29830533,2026-03-13T16:20:57Z,252,0,26,8
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CC-MAIN-2026-08,1153,19544,2587908586,93445289,29549515,2026-03-13T16:25:14Z,234,0,26,77
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CC-MAIN-2026-08,1154,19537,2653924384,95165523,31029731,2026-03-13T16:29:21Z,234,0,28,10
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CC-MAIN-2026-08,1155,19471,2591973632,93888598,29591042,2026-03-13T16:32:21Z,171,0,25,9
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CC-MAIN-2026-08,1201,19808,2613302440,99389904,31420651,2026-03-13T11:28:27Z,244,0,40,0
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CC-MAIN-2026-08,1202,19636,2614718109,93578849,29619593,2026-03-13T11:36:13Z,432,0,33,0
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CC-MAIN-2026-08,1203,19530,2570545683,93147045,29416235,2026-03-13T11:42:05Z,324,0,27,0
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