Publish shard CC-MAIN-2026-08/01937
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/01937.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 **14,
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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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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~612.
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| HTML extracted (uncompressed) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~
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| Final Parquet (Zstd level 19) | 20.9 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 1.8 TB of uncompressed HTML down to 65.
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End to end: ~612.
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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 42h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 36m
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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 **14,617,229 documents across 756 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 756 files of CC-MAIN-2026-08 (14,617,229 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 756 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~612.8 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~31.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 20.9 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 1.8 TB of uncompressed HTML down to 65.9 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: ~612.8 GB of raw gzipped WARCs becomes **20.9 GB of Parquet** — a **96.6% total reduction** — containing 14,617,229 clean markdown documents.
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### Processing Times
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Pipeline timings across 756 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 42h 33m 47s avg 3m 22s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h 9m 1s avg 43s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 36m 44s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/01937.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:68ef8ebe35b208291961871c260c5959d890557d7d93043bd677f495a19023c4
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size 29761323
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stats.csv
CHANGED
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@@ -627,6 +627,7 @@ CC-MAIN-2026-08,1933,19248,2579893230,98704471,31093153,2026-03-13T15:59:11Z,598
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| 627 |
CC-MAIN-2026-08,1934,19550,2574323484,90960336,28636735,2026-03-13T16:02:56Z,206,0,23,30
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CC-MAIN-2026-08,1935,19304,2592135602,98430951,30753776,2026-03-13T16:08:26Z,239,0,81,12
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CC-MAIN-2026-08,1936,19524,2587346278,94370630,29691200,2026-03-13T16:13:56Z,314,0,26,16
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| 630 |
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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@@ -699,7 +700,7 @@ CC-MAIN-2026-08,2580,19296,2524393224,91578828,29472992,2026-03-13T15:21:56Z,318
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| 699 |
CC-MAIN-2026-08,2581,19471,2567634976,95674819,29606440,2026-03-13T15:26:19Z,441,0,39,19
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CC-MAIN-2026-08,2582,19563,2556513838,98156888,31148205,2026-03-13T15:37:54Z,617,0,49,9
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CC-MAIN-2026-08,2583,19288,2578146937,96424818,29805976,2026-03-13T16:00:54Z,1319,0,71,13
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-
CC-MAIN-2026-08,2584,19484,2553112375,97091387,30756815,2026-03-13T16:21:41Z,1206,0,56,
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CC-MAIN-2026-08,1934,19550,2574323484,90960336,28636735,2026-03-13T16:02:56Z,206,0,23,30
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CC-MAIN-2026-08,1935,19304,2592135602,98430951,30753776,2026-03-13T16:08:26Z,239,0,81,12
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CC-MAIN-2026-08,1936,19524,2587346278,94370630,29691200,2026-03-13T16:13:56Z,314,0,26,16
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CC-MAIN-2026-08,1937,19586,2596495848,95252926,29761323,2026-03-13T16:22:11Z,452,0,33,0
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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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CC-MAIN-2026-08,2581,19471,2567634976,95674819,29606440,2026-03-13T15:26:19Z,441,0,39,19
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CC-MAIN-2026-08,2582,19563,2556513838,98156888,31148205,2026-03-13T15:37:54Z,617,0,49,9
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CC-MAIN-2026-08,2583,19288,2578146937,96424818,29805976,2026-03-13T16:00:54Z,1319,0,71,13
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CC-MAIN-2026-08,2584,19484,2553112375,97091387,30756815,2026-03-13T16:21:41Z,1206,0,56,11
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CC-MAIN-2026-08,2801,19800,2573332995,93935647,29781057,2026-03-13T12:36:24Z,480,0,24,0
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CC-MAIN-2026-08,2802,19377,2552826046,96926255,30379332,2026-03-13T12:44:04Z,402,0,56,0
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CC-MAIN-2026-08,2810,19479,2567872535,94762671,29742907,2026-03-13T14:03:56Z,0,0,0,4
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