Publish shard CC-MAIN-2026-08/06162
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/06162.parquet +3 -0
- stats.csv +3 -2
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 **49,
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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) | ~2.0 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 5.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~103.
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| Final Parquet (Zstd level 19) | 70.
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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 5.9 TB of uncompressed HTML down to
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End to end: ~2.0 TB of raw gzipped WARCs becomes **70.
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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 12h 57m 19s avg 18s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 56h 34m
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 19h
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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 **49,126,247 documents across 2535 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 2535 files of CC-MAIN-2026-08 (49,126,247 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 2535 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~2.0 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 5.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~103.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 70.1 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 5.9 TB of uncompressed HTML down to 221.0 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: ~2.0 TB of raw gzipped WARCs becomes **70.1 GB of Parquet** — a **96.6% total reduction** — containing 49,126,247 clean markdown documents.
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### Processing Times
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Pipeline timings across 2535 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 219h 0m 56s avg 5m 11s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 12h 57m 19s avg 18s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 56h 34m 58s avg 1m 20s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 19h 15m 31s avg 27s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/06162.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:f2e90fcaf7dfc3cc280889f37ee8b094c156ccf0cfa340608512f769b0ebd911
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size 29197495
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stats.csv
CHANGED
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@@ -1679,7 +1679,7 @@ CC-MAIN-2026-08,5176,19357,2545788301,92111757,29486528,2026-03-14T16:59:11Z,213
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CC-MAIN-2026-08,5177,19459,2567873093,90620270,28856616,2026-03-14T17:02:48Z,224,0,55,67
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CC-MAIN-2026-08,5178,19545,2605531439,93890256,29444387,2026-03-14T17:07:21Z,234,0,38,53
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CC-MAIN-2026-08,5179,19444,2609051511,95407127,30404662,2026-03-14T17:13:16Z,270,0,47,57
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-
CC-MAIN-2026-08,5180,19394,2562339533,92252404,29300971,2026-03-14T17:18:22Z,264,0,52,
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| 1683 |
CC-MAIN-2026-08,5243,19893,2626328731,92220655,29208053,2026-03-14T01:06:34Z,191,0,29,18
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| 1684 |
CC-MAIN-2026-08,5244,19395,2572365544,91755759,29356531,2026-03-14T01:19:12Z,222,0,24,0
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CC-MAIN-2026-08,5245,19207,2511351197,90003358,28938970,2026-03-14T01:19:12Z,193,0,22,0
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@@ -2374,6 +2374,7 @@ CC-MAIN-2026-08,6158,19638,2623537896,92701477,29359245,2026-03-14T16:59:11Z,232
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CC-MAIN-2026-08,6159,19291,2561228706,89317858,28275692,2026-03-14T17:03:56Z,214,0,81,13
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CC-MAIN-2026-08,6160,19407,2541135298,89309847,28260533,2026-03-14T17:09:09Z,193,0,72,14
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CC-MAIN-2026-08,6161,19466,2582668574,91714130,29766122,2026-03-14T17:14:13Z,253,0,77,14
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CC-MAIN-2026-08,6250,19502,2594302344,89411296,28384540,2026-03-13T17:51:21Z,406,0,120,0
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CC-MAIN-2026-08,6251,19394,2555453090,92793633,28885378,2026-03-14T01:06:36Z,709,0,233,18
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CC-MAIN-2026-08,6252,19389,2566928631,91567909,28780284,2026-03-14T01:06:36Z,515,0,174,18
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@@ -2533,4 +2534,4 @@ CC-MAIN-2026-08,6405,19226,2541023824,96084202,30471499,2026-03-14T16:59:11Z,213
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CC-MAIN-2026-08,6407,19372,2588362401,88540285,28499419,2026-03-14T17:07:21Z,267,0,56,53
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CC-MAIN-2026-08,6408,19474,2581632506,90742834,28736783,2026-03-14T17:12:19Z,290,0,52,55
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CC-MAIN-2026-08,6409,19308,2554804646,96544205,29996046,2026-03-14T17:18:22Z,268,0,57,
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CC-MAIN-2026-08,5177,19459,2567873093,90620270,28856616,2026-03-14T17:02:48Z,224,0,55,67
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CC-MAIN-2026-08,5178,19545,2605531439,93890256,29444387,2026-03-14T17:07:21Z,234,0,38,53
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CC-MAIN-2026-08,5179,19444,2609051511,95407127,30404662,2026-03-14T17:13:16Z,270,0,47,57
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CC-MAIN-2026-08,5180,19394,2562339533,92252404,29300971,2026-03-14T17:18:22Z,264,0,52,30
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| 1683 |
CC-MAIN-2026-08,5243,19893,2626328731,92220655,29208053,2026-03-14T01:06:34Z,191,0,29,18
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CC-MAIN-2026-08,5244,19395,2572365544,91755759,29356531,2026-03-14T01:19:12Z,222,0,24,0
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CC-MAIN-2026-08,5245,19207,2511351197,90003358,28938970,2026-03-14T01:19:12Z,193,0,22,0
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CC-MAIN-2026-08,6159,19291,2561228706,89317858,28275692,2026-03-14T17:03:56Z,214,0,81,13
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CC-MAIN-2026-08,6160,19407,2541135298,89309847,28260533,2026-03-14T17:09:09Z,193,0,72,14
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CC-MAIN-2026-08,6161,19466,2582668574,91714130,29766122,2026-03-14T17:14:13Z,253,0,77,14
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CC-MAIN-2026-08,6162,19501,2576375344,90765634,29197495,2026-03-14T17:19:24Z,242,0,55,0
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CC-MAIN-2026-08,6250,19502,2594302344,89411296,28384540,2026-03-13T17:51:21Z,406,0,120,0
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CC-MAIN-2026-08,6251,19394,2555453090,92793633,28885378,2026-03-14T01:06:36Z,709,0,233,18
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CC-MAIN-2026-08,6252,19389,2566928631,91567909,28780284,2026-03-14T01:06:36Z,515,0,174,18
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CC-MAIN-2026-08,6406,19384,2542661384,94780678,30835494,2026-03-14T17:01:29Z,249,0,60,28
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CC-MAIN-2026-08,6407,19372,2588362401,88540285,28499419,2026-03-14T17:07:21Z,267,0,56,53
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| 2536 |
CC-MAIN-2026-08,6408,19474,2581632506,90742834,28736783,2026-03-14T17:12:19Z,290,0,52,55
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CC-MAIN-2026-08,6409,19308,2554804646,96544205,29996046,2026-03-14T17:18:22Z,268,0,57,30
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