Publish shard CC-MAIN-2026-08/01325
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/01325.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 **12,
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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) | 1.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~27.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 18.5 GB | ~2.9 TB | **-32.3%** 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 1.6 TB of uncompressed HTML down to 58.
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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 30h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 38m 9s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 6h
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Publish (HuggingFace) ████░░░░░░░░░░░░░░░░░░░░ total 5h 22m
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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 **12,912,039 documents across 667 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 667 files of CC-MAIN-2026-08 (12,912,039 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 667 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~540.6 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~27.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 18.5 GB | ~2.9 TB | **-32.3%** 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 1.6 TB of uncompressed HTML down to 58.2 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 68.2%.
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End to end: ~540.6 GB of raw gzipped WARCs becomes **18.5 GB of Parquet** — a **96.6% total reduction** — containing 12,912,039 clean markdown documents.
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### Processing Times
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Pipeline timings across 667 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 30h 39m 20s avg 2m 45s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 38m 9s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 6h 44m 48s avg 36s
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Publish (HuggingFace) ████░░░░░░░░░░░░░░░░░░░░ total 5h 22m 49s avg 29s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/01325.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:da9afcc8fc4d37c0f89d2d9d0a514e1929025030f15b93742cdbaf6f9855504a
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size 21750338
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stats.csv
CHANGED
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@@ -466,7 +466,7 @@ CC-MAIN-2026-08,1130,19434,2589999065,93847517,29294555,2026-03-13T14:49:24Z,220
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CC-MAIN-2026-08,1131,19473,2581041469,92684081,29167525,2026-03-13T14:54:05Z,105,0,24,0
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CC-MAIN-2026-08,1132,19820,2598563563,95076939,29770065,2026-03-13T14:57:18Z,160,0,32,0
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-
CC-MAIN-2026-08,1134,19632,2627807144,96484951,30797968,2026-03-13T15:04:00Z,0,0,26,
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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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@@ -498,6 +498,7 @@ CC-MAIN-2026-08,1321,19508,2621775131,90274846,28351231,2026-03-13T14:54:59Z,0,0
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CC-MAIN-2026-08,1322,19288,2544589204,97716609,30795250,2026-03-13T14:55:27Z,0,0,27,0
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CC-MAIN-2026-08,1323,19744,2604806783,93777361,30094585,2026-03-13T14:58:36Z,165,0,23,0
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CC-MAIN-2026-08,1324,19565,2570112456,96696072,30613076,2026-03-13T15:02:46Z,218,0,32,0
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CC-MAIN-2026-08,1402,19641,2571912489,94392153,29376558,2026-03-13T10:21:08Z,1035,0,797,0
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CC-MAIN-2026-08,1131,19473,2581041469,92684081,29167525,2026-03-13T14:54:05Z,105,0,24,0
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CC-MAIN-2026-08,1132,19820,2598563563,95076939,29770065,2026-03-13T14:57:18Z,160,0,32,0
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CC-MAIN-2026-08,1133,19617,2580391827,91226466,29108970,2026-03-13T15:00:25Z,142,0,44,0
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CC-MAIN-2026-08,1134,19632,2627807144,96484951,30797968,2026-03-13T15:04:00Z,0,0,26,25
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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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CC-MAIN-2026-08,1322,19288,2544589204,97716609,30795250,2026-03-13T14:55:27Z,0,0,27,0
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CC-MAIN-2026-08,1323,19744,2604806783,93777361,30094585,2026-03-13T14:58:36Z,165,0,23,0
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CC-MAIN-2026-08,1324,19565,2570112456,96696072,30613076,2026-03-13T15:02:46Z,218,0,32,0
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CC-MAIN-2026-08,1325,13706,1708499692,69541965,21750338,2026-03-13T15:06:00Z,81,0,64,0
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CC-MAIN-2026-08,1401,19441,2586676962,94334130,29606093,2026-03-13T09:50:34Z,230,0,90,0
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CC-MAIN-2026-08,1402,19641,2571912489,94392153,29376558,2026-03-13T10:21:08Z,1035,0,797,0
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CC-MAIN-2026-08,1403,19445,2589553842,99835858,31697837,2026-03-13T10:51:00Z,1248,0,530,0
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