Publish shard CC-MAIN-2026-08/00098
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/00098.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 **13,
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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) | 1.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~29.4 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 19.9 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 1.7 TB of uncompressed HTML down to 62.
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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 35h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 43m 46s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 7h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 41m
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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 **13,902,270 documents across 718 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 718 files of CC-MAIN-2026-08 (13,902,270 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 718 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~582.0 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~29.4 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 19.9 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 1.7 TB of uncompressed HTML down to 62.6 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: ~582.0 GB of raw gzipped WARCs becomes **19.9 GB of Parquet** — a **96.6% total reduction** — containing 13,902,270 clean markdown documents.
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### Processing Times
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Pipeline timings across 718 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 35h 11m 48s avg 2m 56s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 43m 46s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 7h 38m 30s avg 38s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 41m 11s avg 28s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00098.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:37f9a559a7fb2b3d212d091bf6694f79caded50924031fd018fea132cf29e777
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size 31451722
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stats.csv
CHANGED
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@@ -94,6 +94,7 @@ CC-MAIN-2026-08,90,19236,2517796572,93735940,29562700,2026-03-13T13:45:07Z,88,0,
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CC-MAIN-2026-08,91,19374,2578827857,94619739,29492428,2026-03-13T15:09:05Z,0,173,82,43
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CC-MAIN-2026-08,92,19520,2560251413,93812697,29804536,2026-03-13T15:14:30Z,343,0,53,0
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CC-MAIN-2026-08,93,19565,2625905695,97305588,30010782,2026-03-13T15:22:02Z,271,0,86,42
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CC-MAIN-2026-08,101,19267,2514449658,96925434,30875010,2026-03-13T06:40:05Z,179,0,50,81
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CC-MAIN-2026-08,102,19438,2568537422,97402434,31137610,2026-03-13T06:42:52Z,93,0,20,52
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CC-MAIN-2026-08,103,19511,2593312947,96164480,30296223,2026-03-13T06:47:48Z,187,0,46,61
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@@ -481,7 +482,7 @@ CC-MAIN-2026-08,1134,19632,2627807144,96484951,30797968,2026-03-13T15:04:00Z,0,0
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CC-MAIN-2026-08,1135,19475,2564225205,93499261,29988735,2026-03-13T15:09:05Z,247,0,35,43
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CC-MAIN-2026-08,1136,19562,2558586842,94466221,29107972,2026-03-13T15:22:02Z,301,0,52,42
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CC-MAIN-2026-08,1137,19697,2651902611,92108717,29535260,2026-03-13T15:22:03Z,319,0,63,42
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-
CC-MAIN-2026-08,1143,19552,2602109788,91163721,28844352,2026-03-13T15:43:01Z,294,0,56,
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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-2026-08,1203,19530,2570545683,93147045,29416235,2026-03-13T11:42:05Z,324,0,27,0
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CC-MAIN-2026-08,91,19374,2578827857,94619739,29492428,2026-03-13T15:09:05Z,0,173,82,43
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CC-MAIN-2026-08,92,19520,2560251413,93812697,29804536,2026-03-13T15:14:30Z,343,0,53,0
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CC-MAIN-2026-08,93,19565,2625905695,97305588,30010782,2026-03-13T15:22:02Z,271,0,86,42
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CC-MAIN-2026-08,98,19449,2589117299,98909003,31451722,2026-03-13T15:43:46Z,345,0,33,0
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CC-MAIN-2026-08,101,19267,2514449658,96925434,30875010,2026-03-13T06:40:05Z,179,0,50,81
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CC-MAIN-2026-08,102,19438,2568537422,97402434,31137610,2026-03-13T06:42:52Z,93,0,20,52
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CC-MAIN-2026-08,103,19511,2593312947,96164480,30296223,2026-03-13T06:47:48Z,187,0,46,61
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CC-MAIN-2026-08,1135,19475,2564225205,93499261,29988735,2026-03-13T15:09:05Z,247,0,35,43
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CC-MAIN-2026-08,1136,19562,2558586842,94466221,29107972,2026-03-13T15:22:02Z,301,0,52,42
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CC-MAIN-2026-08,1137,19697,2651902611,92108717,29535260,2026-03-13T15:22:03Z,319,0,63,42
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CC-MAIN-2026-08,1143,19552,2602109788,91163721,28844352,2026-03-13T15:43:01Z,294,0,56,8
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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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