Publish shard CC-MAIN-2026-08/01284
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/01284.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 **19,
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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) | ~
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| HTML extracted (uncompressed) | 2.3 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~40.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 27.4 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 2.3 TB of uncompressed HTML down to 86.
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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 68h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 23m 35s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 16h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 59m 39s 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 **19,113,598 documents across 987 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 987 files of CC-MAIN-2026-08 (19,113,598 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 987 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~800.0 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.3 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~40.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 27.4 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 2.3 TB of uncompressed HTML down to 86.2 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: ~800.0 GB of raw gzipped WARCs becomes **27.4 GB of Parquet** — a **96.6% total reduction** — containing 19,113,598 clean markdown documents.
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### Processing Times
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Pipeline timings across 987 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 68h 24m 30s avg 4m 9s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 23m 35s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 16h 17m 21s avg 59s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 59m 39s avg 25s
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```
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data/CC-MAIN-2026-08/01284.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 sha256:27e1e09bed21e23a040aca0d1fd143771648a723eb6589f2f77c52b09b43b14d
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size 28744136
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stats.csv
CHANGED
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@@ -719,6 +719,7 @@ CC-MAIN-2026-08,1280,19494,2585853708,92016326,29606455,2026-03-13T22:32:56Z,456
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CC-MAIN-2026-08,1281,19713,2643985555,93507903,29802054,2026-03-13T22:44:41Z,476,0,224,14
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| 720 |
CC-MAIN-2026-08,1282,19423,2573958879,91565898,28776186,2026-03-13T22:56:26Z,540,0,162,12
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| 721 |
CC-MAIN-2026-08,1283,19423,2603811246,98778027,30646053,2026-03-13T23:07:41Z,520,0,163,15
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| 722 |
CC-MAIN-2026-08,1301,19417,2601765043,93758124,29790521,2026-03-13T11:40:27Z,0,0,0,0
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CC-MAIN-2026-08,1302,19471,2592470194,95488689,29747494,2026-03-13T11:40:27Z,0,0,0,0
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CC-MAIN-2026-08,1303,19681,2609544680,95027524,30250671,2026-03-13T11:40:27Z,0,0,0,0
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| 719 |
CC-MAIN-2026-08,1281,19713,2643985555,93507903,29802054,2026-03-13T22:44:41Z,476,0,224,14
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| 720 |
CC-MAIN-2026-08,1282,19423,2573958879,91565898,28776186,2026-03-13T22:56:26Z,540,0,162,12
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| 721 |
CC-MAIN-2026-08,1283,19423,2603811246,98778027,30646053,2026-03-13T23:07:41Z,520,0,163,15
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CC-MAIN-2026-08,1284,19467,2582383502,90875225,28744136,2026-03-13T23:20:42Z,591,0,177,0
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CC-MAIN-2026-08,1301,19417,2601765043,93758124,29790521,2026-03-13T11:40:27Z,0,0,0,0
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CC-MAIN-2026-08,1302,19471,2592470194,95488689,29747494,2026-03-13T11:40:27Z,0,0,0,0
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CC-MAIN-2026-08,1303,19681,2609544680,95027524,30250671,2026-03-13T11:40:27Z,0,0,0,0
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