Publish shard CC-MAIN-2026-08/06023
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/06023.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 **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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|---|---|---|---|
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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) | ~55.
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| Final Parquet (Zstd level 19) | 37.
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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 118.
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End to end: ~1.1 TB of raw gzipped WARCs becomes **37.
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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 99h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 24m 53s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 24h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 8h
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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 **26,186,475 documents across 1353 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 1353 files of CC-MAIN-2026-08 (26,186,475 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1353 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) | ~55.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 37.5 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 118.1 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 **37.5 GB of Parquet** — a **96.6% total reduction** — containing 26,186,475 clean markdown documents.
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### Processing Times
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Pipeline timings across 1353 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 99h 10m 55s avg 4m 23s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 24m 53s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 24h 28m 4s avg 1m 5s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 8h 30m 16s avg 22s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/06023.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:3609e9e2d4c636b2277fdf218f178f919ce09eeaef8d28f19925c818c29e0c75
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size 30810872
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stats.csv
CHANGED
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@@ -1185,7 +1185,7 @@ CC-MAIN-2026-08,5038,19514,2592813210,93386659,29547378,2026-03-14T03:27:57Z,236
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| 1185 |
CC-MAIN-2026-08,5039,19479,2605890007,93865946,30204620,2026-03-14T03:31:57Z,202,0,26,2
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| 1186 |
CC-MAIN-2026-08,5040,19411,2535378371,96980713,29665772,2026-03-14T03:37:27Z,272,0,58,15
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| 1187 |
CC-MAIN-2026-08,5041,19567,2619199565,95191414,30001918,2026-03-14T03:41:21Z,169,0,73,2
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| 1188 |
-
CC-MAIN-2026-08,5042,19514,2602120670,94758458,30382663,2026-03-14T03:44:27Z,155,0,30,
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| 1189 |
CC-MAIN-2026-08,5243,19893,2626328731,92220655,29208053,2026-03-14T01:06:34Z,191,0,29,18
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| 1190 |
CC-MAIN-2026-08,5244,19395,2572365544,91755759,29356531,2026-03-14T01:19:12Z,222,0,24,9
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| 1191 |
CC-MAIN-2026-08,5245,19207,2511351197,90003358,28938970,2026-03-14T01:19:12Z,193,0,22,9
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CC-MAIN-2026-08,6020,19298,2532722197,92162976,29313900,2026-03-14T03:25:57Z,307,0,43,11
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| 1331 |
CC-MAIN-2026-08,6021,19502,2587581472,95328111,29848568,2026-03-14T03:33:37Z,351,0,50,39
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| 1332 |
CC-MAIN-2026-08,6022,19567,2578792089,92275651,30059077,2026-03-14T03:37:43Z,174,0,128,8
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| 1333 |
CC-MAIN-2026-08,6250,19502,2594302344,89411296,28384540,2026-03-13T17:51:21Z,406,0,120,0
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| 1334 |
CC-MAIN-2026-08,6251,19394,2555453090,92793633,28885378,2026-03-14T01:06:36Z,709,0,233,18
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| 1335 |
CC-MAIN-2026-08,6252,19389,2566928631,91567909,28780284,2026-03-14T01:06:36Z,515,0,174,18
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|
|
| 1185 |
CC-MAIN-2026-08,5039,19479,2605890007,93865946,30204620,2026-03-14T03:31:57Z,202,0,26,2
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| 1186 |
CC-MAIN-2026-08,5040,19411,2535378371,96980713,29665772,2026-03-14T03:37:27Z,272,0,58,15
|
| 1187 |
CC-MAIN-2026-08,5041,19567,2619199565,95191414,30001918,2026-03-14T03:41:21Z,169,0,73,2
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| 1188 |
+
CC-MAIN-2026-08,5042,19514,2602120670,94758458,30382663,2026-03-14T03:44:27Z,155,0,30,49
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| 1189 |
CC-MAIN-2026-08,5243,19893,2626328731,92220655,29208053,2026-03-14T01:06:34Z,191,0,29,18
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| 1190 |
CC-MAIN-2026-08,5244,19395,2572365544,91755759,29356531,2026-03-14T01:19:12Z,222,0,24,9
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| 1191 |
CC-MAIN-2026-08,5245,19207,2511351197,90003358,28938970,2026-03-14T01:19:12Z,193,0,22,9
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| 1330 |
CC-MAIN-2026-08,6020,19298,2532722197,92162976,29313900,2026-03-14T03:25:57Z,307,0,43,11
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| 1331 |
CC-MAIN-2026-08,6021,19502,2587581472,95328111,29848568,2026-03-14T03:33:37Z,351,0,50,39
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| 1332 |
CC-MAIN-2026-08,6022,19567,2578792089,92275651,30059077,2026-03-14T03:37:43Z,174,0,128,8
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| 1333 |
+
CC-MAIN-2026-08,6023,19660,2610843720,96262717,30810872,2026-03-14T03:45:17Z,258,0,149,0
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| 1334 |
CC-MAIN-2026-08,6250,19502,2594302344,89411296,28384540,2026-03-13T17:51:21Z,406,0,120,0
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| 1335 |
CC-MAIN-2026-08,6251,19394,2555453090,92793633,28885378,2026-03-14T01:06:36Z,709,0,233,18
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| 1336 |
CC-MAIN-2026-08,6252,19389,2566928631,91567909,28780284,2026-03-14T01:06:36Z,515,0,174,18
|