Publish shard CC-MAIN-2026-08/01770
Browse files- README.md +8 -8
- data/CC-MAIN-2026-08/01770.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 **54,
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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) | ~2.2 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 6.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~116.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 78.4 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 6.6 TB of uncompressed HTML down to 247.
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End to end: ~2.2 TB of raw gzipped WARCs becomes **78.4 GB of Parquet** — a **96.6% total reduction** — containing 54,
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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 254h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 13h 28m 50s avg 17s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 65h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 20h 20m 27s avg 25s
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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 **54,998,857 documents across 2838 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 2838 files of CC-MAIN-2026-08 (54,998,857 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 2838 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~2.2 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 6.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~116.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 78.4 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 6.6 TB of uncompressed HTML down to 247.5 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: ~2.2 TB of raw gzipped WARCs becomes **78.4 GB of Parquet** — a **96.6% total reduction** — containing 54,998,857 clean markdown documents.
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### Processing Times
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Pipeline timings across 2838 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 254h 56m 56s avg 5m 23s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 13h 28m 50s avg 17s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 65h 59m 42s avg 1m 23s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 20h 20m 27s avg 25s
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```
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data/CC-MAIN-2026-08/01770.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:eb05a32257671ca17100da47b147eaac1e835734c331ebc8d17edbf38175d9c4
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size 30110205
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stats.csv
CHANGED
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@@ -1548,6 +1548,7 @@ CC-MAIN-2026-08,1766,19490,2562848093,91251121,29029790,2026-03-14T23:07:08Z,618
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CC-MAIN-2026-08,1767,19684,2588112599,97702496,30641744,2026-03-14T23:18:49Z,572,0,76,199
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| 1549 |
CC-MAIN-2026-08,1768,19297,2539185945,89133992,28434898,2026-03-14T23:33:04Z,813,0,78,18
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| 1550 |
CC-MAIN-2026-08,1769,19601,2626628570,95091507,30735708,2026-03-14T23:43:38Z,570,0,76,112
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| 1551 |
CC-MAIN-2026-08,1801,19437,2573915480,93218254,30047553,2026-03-13T10:00:55Z,409,0,121,0
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| 1552 |
CC-MAIN-2026-08,1802,19645,2589675164,95814459,30042225,2026-03-13T10:11:53Z,424,0,233,0
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| 1553 |
CC-MAIN-2026-08,1803,19583,2597232437,94155966,29485837,2026-03-13T10:25:52Z,799,0,38,0
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| 1548 |
CC-MAIN-2026-08,1767,19684,2588112599,97702496,30641744,2026-03-14T23:18:49Z,572,0,76,199
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| 1549 |
CC-MAIN-2026-08,1768,19297,2539185945,89133992,28434898,2026-03-14T23:33:04Z,813,0,78,18
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| 1550 |
CC-MAIN-2026-08,1769,19601,2626628570,95091507,30735708,2026-03-14T23:43:38Z,570,0,76,112
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+
CC-MAIN-2026-08,1770,19426,2604921471,96601535,30110205,2026-03-15T00:05:00Z,1187,0,95,0
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CC-MAIN-2026-08,1801,19437,2573915480,93218254,30047553,2026-03-13T10:00:55Z,409,0,121,0
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| 1553 |
CC-MAIN-2026-08,1802,19645,2589675164,95814459,30042225,2026-03-13T10:11:53Z,424,0,233,0
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| 1554 |
CC-MAIN-2026-08,1803,19583,2597232437,94155966,29485837,2026-03-13T10:25:52Z,799,0,38,0
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