Publish shard CC-MAIN-2026-08/00375
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/00375.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 **22,
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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) | ~945.
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| HTML extracted (uncompressed) | 2.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~47.8 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 32.3 GB | ~2.9 TB | **-32.5%** 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 2.7 TB of uncompressed HTML down to 101.
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End to end: ~945.
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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 88h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 21h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h
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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 **22,543,471 documents across 1167 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 1167 files of CC-MAIN-2026-08 (22,543,471 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1167 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~945.9 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~47.8 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 32.3 GB | ~2.9 TB | **-32.5%** 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 2.7 TB of uncompressed HTML down to 101.7 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 68.3%.
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End to end: ~945.9 GB of raw gzipped WARCs becomes **32.3 GB of Parquet** — a **96.6% total reduction** — containing 22,543,471 clean markdown documents.
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### Processing Times
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Pipeline timings across 1167 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 88h 27m 43s avg 4m 32s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 21h 21m 13s avg 1m 5s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 32m 11s avg 23s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00375.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:c68b157f9e82f7f5063d0b0c495e5697b3353e9420bc57ac9810fd590c729d19
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size 30150053
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stats.csv
CHANGED
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@@ -339,6 +339,7 @@ CC-MAIN-2026-08,371,19658,2574470616,95555396,29867038,2026-03-14T01:22:05Z,492,
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CC-MAIN-2026-08,372,19730,2630163419,93025382,29686173,2026-03-14T01:27:05Z,219,0,70,13
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CC-MAIN-2026-08,373,19438,2601238915,90549698,29100155,2026-03-14T01:34:01Z,279,0,119,19
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CC-MAIN-2026-08,374,19523,2621142679,94084731,29763269,2026-03-14T01:44:36Z,463,0,189,14
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CC-MAIN-2026-08,401,19441,2586676962,94334130,29618260,2026-03-13T11:41:00Z,0,0,33,0
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30560442,2026-03-13T11:49:21Z,0,443,57,0
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29341198,2026-03-13T11:56:46Z,0,414,29,0
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@@ -693,7 +694,7 @@ CC-MAIN-2026-08,1052,0,0,0,343,2026-03-14T01:11:50Z,451,0,0,5
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CC-MAIN-2026-08,1053,19667,2614924242,94869149,29598323,2026-03-14T01:21:35Z,551,0,53,12
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CC-MAIN-2026-08,1054,19494,2602930494,88502975,28683848,2026-03-14T01:29:20Z,357,0,62,15
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CC-MAIN-2026-08,1055,19473,2595775562,93271749,29969403,2026-03-14T01:41:56Z,687,0,51,16
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CC-MAIN-2026-08,1056,19160,2545973799,93816297,29492788,2026-03-14T01:51:50Z,513,0,86,
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CC-MAIN-2026-08,1101,19721,2641197765,95719568,30240239,2026-03-13T09:59:33Z,564,0,296,0
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CC-MAIN-2026-08,372,19730,2630163419,93025382,29686173,2026-03-14T01:27:05Z,219,0,70,13
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CC-MAIN-2026-08,373,19438,2601238915,90549698,29100155,2026-03-14T01:34:01Z,279,0,119,19
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CC-MAIN-2026-08,374,19523,2621142679,94084731,29763269,2026-03-14T01:44:36Z,463,0,189,14
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CC-MAIN-2026-08,375,19411,2543215713,93312187,30150053,2026-03-14T01:52:08Z,386,0,70,0
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CC-MAIN-2026-08,401,19441,2586676962,94334130,29618260,2026-03-13T11:41:00Z,0,0,33,0
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30560442,2026-03-13T11:49:21Z,0,443,57,0
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29341198,2026-03-13T11:56:46Z,0,414,29,0
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CC-MAIN-2026-08,1053,19667,2614924242,94869149,29598323,2026-03-14T01:21:35Z,551,0,53,12
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CC-MAIN-2026-08,1054,19494,2602930494,88502975,28683848,2026-03-14T01:29:20Z,357,0,62,15
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CC-MAIN-2026-08,1055,19473,2595775562,93271749,29969403,2026-03-14T01:41:56Z,687,0,51,16
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CC-MAIN-2026-08,1056,19160,2545973799,93816297,29492788,2026-03-14T01:51:50Z,513,0,86,13
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CC-MAIN-2026-08,1101,19721,2641197765,95719568,30240239,2026-03-13T09:59:33Z,564,0,296,0
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CC-MAIN-2026-08,1102,19562,2608129691,99280759,31748974,2026-03-13T10:28:07Z,1518,0,191,0
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CC-MAIN-2026-08,1103,19270,2517580674,89253461,28361470,2026-03-13T10:55:39Z,1380,0,268,0
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