Publish shard CC-MAIN-2026-08/00100
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/00100.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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|---|---|---|---|
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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.
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| Final Parquet (Zstd level 19) | 20.1 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 63.
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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 44m
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 42m
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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 **14,057,600 documents across 726 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 726 files of CC-MAIN-2026-08 (14,057,600 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 726 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~588.5 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) | ~29.8 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 20.1 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 63.3 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 68.2%.
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End to end: ~588.5 GB of raw gzipped WARCs becomes **20.1 GB of Parquet** — a **96.6% total reduction** — containing 14,057,600 clean markdown documents.
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### Processing Times
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Pipeline timings across 726 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 35h 57m 57s avg 2m 58s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 43m 46s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 7h 44m 56s avg 38s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 42m 47s avg 28s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00100.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:0f8614f70b352d026d05c20afaa1507365dae74a908716f6c02b24e44c8cbff0
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size 30026373
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stats.csv
CHANGED
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@@ -96,6 +96,7 @@ CC-MAIN-2026-08,92,19520,2560251413,93812697,29804536,2026-03-13T15:14:30Z,343,0
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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,345,0,33,22
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CC-MAIN-2026-08,99,19479,2575024379,92544874,29917329,2026-03-13T15:48:21Z,227,0,28,17
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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-2026-08,1137,19697,2651902611,92108717,29535260,2026-03-13T15:22:03Z,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-2026-08,1144,19509,2566481040,94883595,29205160,2026-03-13T15:47:02Z,179,0,55,8
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CC-MAIN-2026-08,1145,19433,2544313558,90984935,28652764,2026-03-13T15:51:01Z,186,0,52,
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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-2026-08,93,19565,2625905695,97305588,30010782,2026-03-13T15:22:02Z,271,0,86,42
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CC-MAIN-2026-08,98,19449,2589117299,98909003,31451722,2026-03-13T15:43:46Z,345,0,33,22
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CC-MAIN-2026-08,99,19479,2575024379,92544874,29917329,2026-03-13T15:48:21Z,227,0,28,17
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CC-MAIN-2026-08,100,19468,2560323629,93642547,30026373,2026-03-13T15:51:46Z,201,0,28,0
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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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| 101 |
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-2026-08,1137,19697,2651902611,92108717,29535260,2026-03-13T15:22:03Z,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-2026-08,1144,19509,2566481040,94883595,29205160,2026-03-13T15:47:02Z,179,0,55,8
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CC-MAIN-2026-08,1145,19433,2544313558,90984935,28652764,2026-03-13T15:51:01Z,186,0,52,35
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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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