Publish shard CC-MAIN-2026-08/01930
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/01930.parquet +3 -0
- stats.csv +2 -1
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 **13,
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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) | 1.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~28.
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| Final Parquet (Zstd level 19) | 19.2 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 1.6 TB of uncompressed HTML down to 60.
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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 36h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 9s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h
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```
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### Dataset Charts
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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 **13,391,391 documents across 693 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 693 files of CC-MAIN-2026-08 (13,391,391 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 693 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~561.7 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~28.4 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 19.2 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 1.6 TB of uncompressed HTML down to 60.4 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: ~561.7 GB of raw gzipped WARCs becomes **19.2 GB of Parquet** — a **96.6% total reduction** — containing 13,391,391 clean markdown documents.
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### Processing Times
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Pipeline timings across 693 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 36h 13m 0s avg 3m 8s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 9s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h 7m 4s avg 42s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 17m 10s avg 27s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/01930.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:05bfae17e68a5c998b7e3ef6bafb40ea6144f3a1afe70986cd3bb32d01fabf1d
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size 28878497
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stats.csv
CHANGED
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@@ -588,6 +588,7 @@ CC-MAIN-2026-08,1926,19426,2551882370,97586983,30989565,2026-03-13T14:53:07Z,549
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CC-MAIN-2026-08,1927,19721,2624331172,94060645,30204608,2026-03-13T15:02:26Z,397,0,161,0
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CC-MAIN-2026-08,2101,19421,2568457366,93149947,28748313,2026-03-13T13:54:07Z,262,0,31,0
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CC-MAIN-2026-08,2102,19717,2608848648,96373346,30639542,2026-03-13T14:00:38Z,281,0,109,0
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CC-MAIN-2026-08,2103,19325,2580718688,94798987,30249683,2026-03-13T14:06:18Z,304,0,34,0
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@@ -635,7 +636,7 @@ CC-MAIN-2026-08,2322,19459,2527978218,91383223,28447926,2026-03-13T13:41:25Z,152
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CC-MAIN-2026-08,2324,19548,2591124523,95026738,29706594,2026-03-13T15:08:51Z,243,0,50,9
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CC-MAIN-2026-08,2325,19795,2595958710,94769924,30381849,2026-03-13T15:21:56Z,340,0,120,4
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CC-MAIN-2026-08,1929,19636,2583727825,94857326,29780590,2026-03-13T15:21:56Z,463,0,58,4
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CC-MAIN-2026-08,2102,19717,2608848648,96373346,30639542,2026-03-13T14:00:38Z,281,0,109,0
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CC-MAIN-2026-08,2103,19325,2580718688,94798987,30249683,2026-03-13T14:06:18Z,304,0,34,0
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CC-MAIN-2026-08,2323,19257,2556264403,93065200,29035825,2026-03-13T13:44:28Z,149,0,33,0
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CC-MAIN-2026-08,2325,19795,2595958710,94769924,30381849,2026-03-13T15:21:56Z,340,0,120,4
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CC-MAIN-2026-08,2326,19585,2528968070,92409071,30194739,2026-03-13T15:25:30Z,413,0,125,18
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CC-MAIN-2026-08,2551,5410,611835922,35005098,10258608,2026-03-13T12:28:41Z,32,0,10,0
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CC-MAIN-2026-08,2552,19598,2602424114,96235194,30473559,2026-03-13T12:36:26Z,437,0,26,0
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CC-MAIN-2026-08,2553,19534,2542432805,90911643,29613848,2026-03-13T12:44:33Z,444,0,41,0
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