Publish shard CC-MAIN-2026-08/01224
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/01224.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 **55,
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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.
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| Final Parquet (Zstd level 19) | 78.
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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.
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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 255h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 13h 28m 50s avg 17s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 66h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 20h 22m 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 **55,077,107 documents across 2842 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 2842 files of CC-MAIN-2026-08 (55,077,107 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 2842 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) | ~116.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 78.6 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 247.8 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 **78.6 GB of Parquet** — a **96.6% total reduction** — containing 55,077,107 clean markdown documents.
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### Processing Times
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Pipeline timings across 2842 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 255h 50m 38s avg 5m 24s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 13h 28m 50s avg 17s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 66h 7m 51s avg 1m 23s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 20h 22m 27s avg 25s
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```
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data/CC-MAIN-2026-08/01224.parquet
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@@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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oid sha256:ae08e05767c578395d0cbae7f6769bf1d438ffa5bac8c9cde8b7d8e87985f7f9
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size 30311183
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stats.csv
CHANGED
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@@ -1179,6 +1179,7 @@ CC-MAIN-2026-08,1220,19551,2607251638,95145629,30164862,2026-03-14T23:22:33Z,468
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| 1179 |
CC-MAIN-2026-08,1221,19414,2579247514,93335521,30134703,2026-03-14T23:34:17Z,564,0,145,20
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| 1180 |
CC-MAIN-2026-08,1222,19650,2589039487,90531330,28315780,2026-03-14T23:49:38Z,544,0,376,31
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| 1181 |
CC-MAIN-2026-08,1223,19563,2619985084,90146687,28764264,2026-03-14T23:59:38Z,243,0,353,25
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| 1182 |
CC-MAIN-2026-08,1250,19570,2579186072,96548314,30182713,2026-03-13T17:40:42Z,339,0,97,26
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CC-MAIN-2026-08,1251,19338,2590830646,96118830,30643824,2026-03-13T17:49:32Z,454,0,109,16
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| 1184 |
CC-MAIN-2026-08,1252,19317,2547574291,92820055,29625468,2026-03-13T17:58:44Z,410,0,136,0
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| 1179 |
CC-MAIN-2026-08,1221,19414,2579247514,93335521,30134703,2026-03-14T23:34:17Z,564,0,145,20
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| 1180 |
CC-MAIN-2026-08,1222,19650,2589039487,90531330,28315780,2026-03-14T23:49:38Z,544,0,376,31
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| 1181 |
CC-MAIN-2026-08,1223,19563,2619985084,90146687,28764264,2026-03-14T23:59:38Z,243,0,353,25
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CC-MAIN-2026-08,1224,19543,2555455279,96595426,30311183,2026-03-15T00:09:08Z,482,0,92,0
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| 1183 |
CC-MAIN-2026-08,1250,19570,2579186072,96548314,30182713,2026-03-13T17:40:42Z,339,0,97,26
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| 1184 |
CC-MAIN-2026-08,1251,19338,2590830646,96118830,30643824,2026-03-13T17:49:32Z,454,0,109,16
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| 1185 |
CC-MAIN-2026-08,1252,19317,2547574291,92820055,29625468,2026-03-13T17:58:44Z,410,0,136,0
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