Publish shard CC-MAIN-2026-08/00378
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/00378.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 **23,
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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) | 2.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~49.8 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 33.
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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 2.8 TB of uncompressed HTML down to
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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 92h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 22h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 46m
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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 **23,498,752 documents across 1216 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 1216 files of CC-MAIN-2026-08 (23,498,752 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1216 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~985.6 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~49.8 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 33.7 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 2.8 TB of uncompressed HTML down to 106.0 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: ~985.6 GB of raw gzipped WARCs becomes **33.7 GB of Parquet** — a **96.6% total reduction** — containing 23,498,752 clean markdown documents.
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### Processing Times
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Pipeline timings across 1216 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 92h 54m 47s avg 4m 35s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 22h 30m 2s avg 1m 6s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 46m 43s avg 23s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00378.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:9bd49d6dd00bc6c46b9a06d606197f04a47240295b228654acdec696c22dcc95
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size 29665998
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stats.csv
CHANGED
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@@ -345,6 +345,7 @@ CC-MAIN-2026-08,374,19523,2621142679,94084731,29763269,2026-03-14T01:44:36Z,463,
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CC-MAIN-2026-08,375,19411,2543215713,93312187,30150053,2026-03-14T01:52:08Z,386,0,70,15
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CC-MAIN-2026-08,376,19603,2573100392,94744832,31392835,2026-03-14T02:02:32Z,474,0,127,22
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CC-MAIN-2026-08,377,19653,2608016900,94790831,30143007,2026-03-14T02:12:35Z,526,0,101,14
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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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CC-MAIN-2026-08,1056,19160,2545973799,93816297,29492788,2026-03-14T01:51:50Z,513,0,86,13
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CC-MAIN-2026-08,1057,19453,2627415256,95233201,30715354,2026-03-14T02:02:05Z,488,0,134,21
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CC-MAIN-2026-08,1058,19384,2579827267,98956386,30299805,2026-03-14T02:12:35Z,527,0,104,14
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CC-MAIN-2026-08,1059,19653,2580206601,92862598,30101468,2026-03-14T02:24:20Z,546,0,155,
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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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CC-MAIN-2026-08,375,19411,2543215713,93312187,30150053,2026-03-14T01:52:08Z,386,0,70,15
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CC-MAIN-2026-08,376,19603,2573100392,94744832,31392835,2026-03-14T02:02:32Z,474,0,127,22
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CC-MAIN-2026-08,377,19653,2608016900,94790831,30143007,2026-03-14T02:12:35Z,526,0,101,14
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CC-MAIN-2026-08,378,19520,2557252949,91815354,29665998,2026-03-14T02:24:41Z,543,0,167,0
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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-2026-08,1056,19160,2545973799,93816297,29492788,2026-03-14T01:51:50Z,513,0,86,13
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CC-MAIN-2026-08,1057,19453,2627415256,95233201,30715354,2026-03-14T02:02:05Z,488,0,134,21
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CC-MAIN-2026-08,1058,19384,2579827267,98956386,30299805,2026-03-14T02:12:35Z,527,0,104,14
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CC-MAIN-2026-08,1059,19653,2580206601,92862598,30101468,2026-03-14T02:24:20Z,546,0,155,16
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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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