Publish shard CC-MAIN-2026-08/00808
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00808.parquet +3 -0
- stats.csv +1 -0
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 **26,
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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) | ~1.1 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 3.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~56.
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| Final Parquet (Zstd level 19) | 37.9 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 3.2 TB of uncompressed HTML down to 119.
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End to end: ~1.1 TB of raw gzipped WARCs becomes **37.9 GB of Parquet** — a **96.6% total reduction** — containing 26,
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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 7h 49m 11s avg 20s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 26h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 8h 23m 32s avg 22s
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```
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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 **26,493,803 documents across 1370 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 1370 files of CC-MAIN-2026-08 (26,493,803 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1370 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~1.1 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 3.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~56.2 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 37.9 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 3.2 TB of uncompressed HTML down to 119.5 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: ~1.1 TB of raw gzipped WARCs becomes **37.9 GB of Parquet** — a **96.6% total reduction** — containing 26,493,803 clean markdown documents.
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### Processing Times
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Pipeline timings across 1370 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 106h 1m 47s avg 4m 38s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 49m 11s avg 20s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 26h 11m 46s avg 1m 8s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 8h 23m 32s avg 22s
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```
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data/CC-MAIN-2026-08/00808.parquet
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@@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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oid sha256:180cac017805cb13f711ffcbbfbdfd4836c37cfa9f9e0c79a9761f96592fd386
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size 30923128
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stats.csv
CHANGED
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@@ -620,6 +620,7 @@ CC-MAIN-2026-08,804,19533,2600701066,98156820,30469294,2026-03-14T03:16:50Z,0,49
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CC-MAIN-2026-08,805,19427,2610866318,96874362,30385357,2026-03-14T03:28:02Z,0,431,227,27
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| 621 |
CC-MAIN-2026-08,806,19671,2607243258,96867910,30601551,2026-03-14T03:38:25Z,0,487,145,32
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| 622 |
CC-MAIN-2026-08,807,19677,2589017589,93848767,29986202,2026-03-14T03:50:20Z,0,483,227,25
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| 623 |
CC-MAIN-2026-08,851,19575,2612873485,97000364,30911294,2026-03-13T06:41:39Z,163,0,37,204
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| 624 |
CC-MAIN-2026-08,852,19334,2546015208,94959847,30205044,2026-03-13T06:45:52Z,183,0,57,11
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| 625 |
CC-MAIN-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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| 620 |
CC-MAIN-2026-08,805,19427,2610866318,96874362,30385357,2026-03-14T03:28:02Z,0,431,227,27
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| 621 |
CC-MAIN-2026-08,806,19671,2607243258,96867910,30601551,2026-03-14T03:38:25Z,0,487,145,32
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| 622 |
CC-MAIN-2026-08,807,19677,2589017589,93848767,29986202,2026-03-14T03:50:20Z,0,483,227,25
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+
CC-MAIN-2026-08,808,19634,2591024925,96170148,30923128,2026-03-14T04:01:25Z,528,0,149,0
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CC-MAIN-2026-08,851,19575,2612873485,97000364,30911294,2026-03-13T06:41:39Z,163,0,37,204
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| 625 |
CC-MAIN-2026-08,852,19334,2546015208,94959847,30205044,2026-03-13T06:45:52Z,183,0,57,11
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| 626 |
CC-MAIN-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
|