Publish 6 shards CC-MAIN-2026-12/16221–16453
Browse files- README.md +13 -13
- data/CC-MAIN-2026-12/01/62/016221.parquet +3 -0
- data/CC-MAIN-2026-12/01/62/016259.parquet +3 -0
- data/CC-MAIN-2026-12/01/63/016309.parquet +3 -0
- data/CC-MAIN-2026-12/01/63/016358.parquet +3 -0
- data/CC-MAIN-2026-12/01/64/016403.parquet +3 -0
- data/CC-MAIN-2026-12/01/64/016453.parquet +3 -0
- stats.csv +12 -6
README.md
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@@ -32,19 +32,19 @@ configs:
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**Open Markdown** is a large-scale web text dataset built from [Common Crawl](https://commoncrawl.org). Common Crawl is a non-profit that crawls the web and freely provides its archives and datasets to the public — see [their latest crawl announcement](https://commoncrawl.org/blog/march-2026-crawl-archive-now-available) for details on the source data. Every page goes through a pipeline that extracts the main content from raw HTML, converts it to clean Markdown, and packages the result into Parquet files with useful WARC metadata for traceability.
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The dataset currently includes crawl **CC-MAIN-2026-12** with **277,
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### Live Progress
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Processing at **
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Estimated completion: **April
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**Current server:** 6 CPU cores, 12 GB RAM (3.
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**Memory per session:** avg 578 MB, peak 799 MB (measured via VmRSS)
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**With 10 identical servers:**
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**Open Markdown** 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) | ~12.8 TB | ~79.2 TB | — |
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| HTML extracted (uncompressed) | 36.0 TB | ~222.5 TB | — |
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| Markdown (clean text) | 2.3 TB | ~6.8 TB | **-96.9%** vs HTML |
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| Final Parquet (Zstd) | 745.
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The big win is HTML → Markdown conversion: the tokenizer strips all tags, scripts, styles, navigation, and ads, keeping only the main content. This cuts 36.0 TB of uncompressed HTML down to 2.3 TB of markdown — a **96.9% reduction**. Parquet with Zstd then compresses the markdown a further 68.9%.
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End to end: ~12.8 TB of raw gzipped WARCs becomes **745.
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### Processing Times
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Pipeline timings across
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```
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Download (raw WARC) █████████░░░░░░░░░░░░░░░
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Convert (HTML → Markdown → Parquet) ████████████████████████
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ 60h
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```
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### Dataset Charts
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**Open Markdown** is a large-scale web text dataset built from [Common Crawl](https://commoncrawl.org). Common Crawl is a non-profit that crawls the web and freely provides its archives and datasets to the public — see [their latest crawl announcement](https://commoncrawl.org/blog/march-2026-crawl-archive-now-available) for details on the source data. Every page goes through a pipeline that extracts the main content from raw HTML, converts it to clean Markdown, and packages the result into Parquet files with useful WARC metadata for traceability.
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The dataset currently includes crawl **CC-MAIN-2026-12** with **277,787,396 documents across 16186 shards**. Processed 36.0 TB of raw HTML into 2.3 TB of clean Markdown — a **96.9% reduction**. We plan to add more snapshots over time.
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### Live Progress
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Processing at **128.0 shards/hour** — 16,186 of 100,000 done (**16.19%**)
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Estimated completion: **April 23, 2026** (27 days)
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**Current server:** 6 CPU cores, 12 GB RAM (3.7 GB available), 100 GB disk free
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**Memory per session:** avg 578 MB, peak 799 MB (measured via VmRSS)
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**With 10 identical servers:** 1280 shards/hour → March 29, 2026 (3 days)
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**Open Markdown** 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 16186 files of CC-MAIN-2026-12 (277,787,396 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 16186 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~12.8 TB | ~79.2 TB | — |
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| HTML extracted (uncompressed) | 36.0 TB | ~222.5 TB | — |
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| Markdown (clean text) | 2.3 TB | ~6.8 TB | **-96.9%** vs HTML |
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| Final Parquet (Zstd) | 745.3 GB | ~4.5 TB | **-68.9%** vs markdown |
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The big win is HTML → Markdown conversion: the tokenizer strips all tags, scripts, styles, navigation, and ads, keeping only the main content. This cuts 36.0 TB of uncompressed HTML down to 2.3 TB of markdown — a **96.9% reduction**. Parquet with Zstd then compresses the markdown a further 68.9%.
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End to end: ~12.8 TB of raw gzipped WARCs becomes **745.3 GB of Parquet** — a **94.3% total reduction** — containing 277,787,396 clean markdown documents.
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### Processing Times
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Pipeline timings across 16186 shards of CC-MAIN-2026-12:
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```
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Download (raw WARC) █████████░░░░░░░░░░░░░░░ 154h 6m 30s
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Convert (HTML → Markdown → Parquet) ████████████████████████ 376h 4m 30s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ 60h 32m 53s
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```
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### Dataset Charts
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data/CC-MAIN-2026-12/01/62/016221.parquet
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data/CC-MAIN-2026-12/01/64/016453.parquet
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stats.csv
CHANGED
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@@ -16133,7 +16133,8 @@ CC-MAIN-2026-12,16216,17457,2470752280,163912700,50369829,2026-03-26T22:28:00Z,5
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@@ -16142,7 +16143,8 @@ CC-MAIN-2026-12,16254,17555,2537442340,166081663,52544895,2026-03-26T22:31:00Z,5
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CC-MAIN-2026-12,16255,17723,2535342155,161860968,50592351,2026-03-26T22:33:50Z,92,114,1,9,582
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@@ -16151,7 +16153,8 @@ CC-MAIN-2026-12,16304,17485,2486378810,164409013,52800032,2026-03-26T22:31:00Z,7
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@@ -16159,10 +16162,13 @@ CC-MAIN-2026-12,16353,17553,2515523677,164933230,51217873,2026-03-26T22:28:00Z,7
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CC-MAIN-2026-12,16402,17573,2495499537,157156882,48804028,2026-03-26T22:39:20Z,0,143,1,10,565
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CC-MAIN-2026-12,16403,17293,2477909193,161005769,48758957,2026-03-26T22:42:00Z,76,143,2,0,615
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CC-MAIN-2026-12,16450,17559,2505605956,157831218,50417945,2026-03-26T22:33:50Z,85,135,0,9,593
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CC-MAIN-2026-12,16451,17206,2465554639,158844073,48158555,2026-03-26T22:36:30Z,0,137,0,11,584
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CC-MAIN-2026-12,16452,17630,2508433942,160186808,48683229,2026-03-26T22:39:20Z,136,146,2,10,580
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CC-MAIN-2026-12,16453,17255,2442040583,154170965,47846010,2026-03-26T22:42:00Z,0,146,1,0,606
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