Publish shard CC-MAIN-2026-08/00964
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00964.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) | ~2.3 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 6.
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| Packed markdown WARC (.md.warc.gz) | ~116.8 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 78.8 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.
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End to end: ~2.3 TB of raw gzipped WARCs becomes **78.8 GB of Parquet** — a **96.6% total reduction** — containing 55,
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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
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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 25m 40s 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 **55,252,614 documents across 2851 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 2851 files of CC-MAIN-2026-08 (55,252,614 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 2851 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~2.3 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 6.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~116.8 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 78.8 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 6.7 TB of uncompressed HTML down to 248.6 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 68.3%.
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End to end: ~2.3 TB of raw gzipped WARCs becomes **78.8 GB of Parquet** — a **96.6% total reduction** — containing 55,252,614 clean markdown documents.
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### Processing Times
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Pipeline timings across 2851 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 257h 4m 25s avg 5m 24s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 13h 28m 50s avg 17s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 66h 31m 12s avg 1m 23s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 20h 25m 40s avg 25s
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```
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data/CC-MAIN-2026-08/00964.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 sha256:6d9e059e54113679ea1f00074d5d66c1d23484ce10d729b41716b54dd24a0098
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size 29411541
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stats.csv
CHANGED
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@@ -958,6 +958,7 @@ CC-MAIN-2026-08,960,19438,2559838245,92260589,29712091,2026-03-14T23:42:08Z,334,
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CC-MAIN-2026-08,961,19446,2604266064,90437680,29062487,2026-03-14T23:51:38Z,551,0,22,27
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| 959 |
CC-MAIN-2026-08,962,19364,2568770275,89072965,28756313,2026-03-15T00:06:13Z,734,0,134,21
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| 960 |
CC-MAIN-2026-08,963,19301,2572069119,93109648,30052994,2026-03-15T00:16:42Z,506,0,132,27
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| 961 |
CC-MAIN-2026-08,1000,19490,2581039608,93029785,29406839,2026-03-13T11:28:30Z,251,0,36,0
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| 962 |
CC-MAIN-2026-08,1001,19530,2577623205,97623904,31829877,2026-03-13T10:02:20Z,605,0,422,0
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| 963 |
CC-MAIN-2026-08,1002,19902,2636069231,96321082,30349720,2026-03-13T10:30:12Z,1385,0,282,0
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| 958 |
CC-MAIN-2026-08,961,19446,2604266064,90437680,29062487,2026-03-14T23:51:38Z,551,0,22,27
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| 959 |
CC-MAIN-2026-08,962,19364,2568770275,89072965,28756313,2026-03-15T00:06:13Z,734,0,134,21
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| 960 |
CC-MAIN-2026-08,963,19301,2572069119,93109648,30052994,2026-03-15T00:16:42Z,506,0,132,27
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+
CC-MAIN-2026-08,964,19612,2597143551,92440786,29411541,2026-03-15T00:27:04Z,519,0,102,0
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CC-MAIN-2026-08,1000,19490,2581039608,93029785,29406839,2026-03-13T11:28:30Z,251,0,36,0
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| 963 |
CC-MAIN-2026-08,1001,19530,2577623205,97623904,31829877,2026-03-13T10:02:20Z,605,0,422,0
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| 964 |
CC-MAIN-2026-08,1002,19902,2636069231,96321082,30349720,2026-03-13T10:30:12Z,1385,0,282,0
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