Publish shard CC-MAIN-2026-08/00414
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00414.parquet +3 -0
- stats.csv +3 -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 **2,
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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) | ~
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| HTML extracted (uncompressed) |
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| Packed markdown WARC (.md.warc.gz) | ~4.
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| Final Parquet (Zstd level 19) | 3.3 GB | ~2.9 TB | **-31.9%** 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
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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
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 8s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total
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Publish (HuggingFace) ███████░░░░░░░░░░░░░░░░░ total 1h 15m 44s avg
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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 **2,352,397 documents across 120 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 120 files of CC-MAIN-2026-08 (2,352,397 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 120 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~97.3 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 291.8 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~4.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 3.3 GB | ~2.9 TB | **-31.9%** 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 291.8 GB of uncompressed HTML down to 10.4 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 68.0%.
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End to end: ~97.3 GB of raw gzipped WARCs becomes **3.3 GB of Parquet** — a **96.6% total reduction** — containing 2,352,397 clean markdown documents.
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### Processing Times
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Pipeline timings across 120 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 4h 1m 48s avg 2m 0s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 8s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 49m 22s avg 24s
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Publish (HuggingFace) ███████░░░░░░░░░░░░░░░░░ total 1h 15m 44s avg 37s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00414.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:50d7a74fbbf971adfabd02870fdc44e24132763e5483d64144ec037ee38a3acd
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size 29779422
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stats.csv
CHANGED
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@@ -59,6 +59,7 @@ CC-MAIN-2026-08,109,19487,2556703136,91883241,29188577,2026-03-13T07:19:05Z,164,
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CC-MAIN-2026-08,110,19345,2585860073,93489029,30521102,2026-03-13T07:23:31Z,221,0,31,11
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CC-MAIN-2026-08,111,19477,2631100726,91693229,29275356,2026-03-13T07:26:13Z,107,0,34,18
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CC-MAIN-2026-08,112,19303,2509547426,90712416,29155400,2026-03-13T07:29:14Z,119,0,27,33
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| 62 |
CC-MAIN-2026-08,251,19610,2594898345,97558492,31917087,2026-03-13T06:42:12Z,277,0,23,136
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CC-MAIN-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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CC-MAIN-2026-08,253,19312,2557230855,96017199,30399966,2026-03-13T06:51:42Z,130,0,23,117
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CC-MAIN-2026-08,260,19334,2553916248,92962972,29646143,2026-03-13T07:22:01Z,284,0,29,17
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CC-MAIN-2026-08,262,19342,2556139647,91304795,28470338,2026-03-13T07:28:17Z,136,0,23,7
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-
CC-MAIN-2026-08,263,19704,2599536323,94011169,29652032,2026-03-13T07:
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CC-MAIN-2026-08,401,19517,2605589961,95609438,30404753,2026-03-13T06:41:08Z,218,0,47,107
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30588984,2026-03-13T06:43:58Z,98,0,26,44
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29375992,2026-03-13T06:49:29Z,198,0,33,98
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@@ -85,6 +86,7 @@ CC-MAIN-2026-08,410,19536,2605916424,93892532,29936094,2026-03-13T07:19:04Z,182,
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CC-MAIN-2026-08,111,19477,2631100726,91693229,29275356,2026-03-13T07:26:13Z,107,0,34,18
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CC-MAIN-2026-08,112,19303,2509547426,90712416,29155400,2026-03-13T07:29:14Z,119,0,27,33
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CC-MAIN-2026-08,113,19468,2542994320,95581406,30306018,2026-03-13T07:31:39Z,123,0,21,0
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CC-MAIN-2026-08,251,19610,2594898345,97558492,31917087,2026-03-13T06:42:12Z,277,0,23,136
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CC-MAIN-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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CC-MAIN-2026-08,253,19312,2557230855,96017199,30399966,2026-03-13T06:51:42Z,130,0,23,117
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CC-MAIN-2026-08,260,19334,2553916248,92962972,29646143,2026-03-13T07:22:01Z,284,0,29,17
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CC-MAIN-2026-08,261,19637,2584855305,96241876,32062389,2026-03-13T07:25:30Z,139,0,25,42
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CC-MAIN-2026-08,262,19342,2556139647,91304795,28470338,2026-03-13T07:28:17Z,136,0,23,7
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CC-MAIN-2026-08,263,19704,2599536323,94011169,29652032,2026-03-13T07:32:21Z,124,0,35,83
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30588984,2026-03-13T06:43:58Z,98,0,26,44
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29375992,2026-03-13T06:49:29Z,198,0,33,98
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CC-MAIN-2026-08,412,19421,2588662566,94735501,31063646,2026-03-13T07:27:01Z,121,0,25,13
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CC-MAIN-2026-08,413,19245,2557370915,94249339,29958343,2026-03-13T07:30:13Z,144,0,31,15
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CC-MAIN-2026-08,414,19623,2591080218,95450599,29779422,2026-03-13T07:32:19Z,103,0,22,0
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CC-MAIN-2026-08,551,19551,2609034951,89980913,29167227,2026-03-13T06:42:51Z,280,0,20,176
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