Publish shard CC-MAIN-2026-08/00886

README.md

@@ -32,7 +32,7 @@ configs:
 
 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.
 
-The dataset currently includes crawl **CC-MAIN-2026-08** with **4,644,112 documents across 238 shards**. We plan to add more snapshots over time.
+The dataset currently includes crawl **CC-MAIN-2026-08** with **4,837,961 documents across 248 shards**. We plan to add more snapshots over time.
 
 Open Index is released under the **Open Data Commons Attribution License (ODC-By) v1.0**, the same license used by Common Crawl.
 
@@ -118,6 +118,7 @@ The following is an example row from the dataset:
   "warc_refers_to": "<urn:uuid:f9e8d7c6-b5a4-3210-fedc-ba0987654321>",
   "html_length": 48210,
   "markdown_length": 3847,
+  "warc_headers_json": "{\"Content-Length\": \"3847\", ...}",
   "markdown": "# Interesting Topic\n\nThis is the main content of the page..."
 }
 ```
@@ -130,10 +131,11 @@ The following is an example row from the dataset:
 | `url` | string | Original URL of the crawled page |
 | `host` | string | Lowercase hostname extracted from the URL |
 | `crawl_date` | string | RFC 3339 timestamp from the WARC record |
-| `warc_record_id` | string | Full WARC-Record-ID of this conversion record (`<urn:uuid:...>`) |
+| `warc_record_id` | string | Full WARC-Record-ID of the conversion record (`<urn:uuid:...>`) |
 | `warc_refers_to` | string | WARC-Record-ID of the original HTTP response this was converted from |
 | `html_length` | int64 | Byte length of the original HTML body before conversion |
 | `markdown_length` | int64 | Byte length of the converted markdown body |
+| `warc_headers_json` | string | All WARC headers as a sorted-key JSON object — full provenance in one column |
 | `markdown` | string | Clean markdown content extracted from the page |
 
 ### Data Splits
@@ -164,37 +166,35 @@ Empty conversions (pages where trafilatura could not extract meaningful content)
 
 ### Compression Ratios
 
-Numbers below are actual measurements summed across all 238 files of CC-MAIN-2026-08 (4,644,112 pages total), projected to the full crawl of 100,000 WARC files.
+Numbers below are actual measurements summed across all 248 files of CC-MAIN-2026-08 (4,837,961 pages total), projected to the full crawl of 100,000 WARC files.
 
-| Stage | 238 files (measured) | 100,000 files (projected) | Reduction |
+| Stage | 248 files (measured) | 100,000 files (projected) | Reduction |
 |---|---|---|---|
-| Raw WARC (.warc.gz, downloaded) | ~192.9 GB | ~83 TB | — |
-| HTML extracted (uncompressed) | 574.3 GB | ~295 TB | — |
-| Packed markdown WARC (.md.warc.gz) | ~9.8 GB | ~3.7 TB | **-98.3%** vs HTML |
-| Final Parquet (Zstd level 19) | 6.6 GB | ~2.9 TB | **-32.1%** vs packed WARC |
+| Raw WARC (.warc.gz, downloaded) | ~201.0 GB | ~83 TB | — |
+| HTML extracted (uncompressed) | 598.2 GB | ~295 TB | — |
+| Packed markdown WARC (.md.warc.gz) | ~10.2 GB | ~3.7 TB | **-98.3%** vs HTML |
+| Final Parquet (Zstd level 19) | 6.9 GB | ~2.9 TB | **-32.1%** vs packed WARC |
 
-The big win is the HTML → Markdown step: trafilatura strips all tags, scripts, styles, navigation, and ads, keeping only the main content. This cuts 574.3 GB of uncompressed HTML down to 20.8 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 68.1%.
+The big win is the HTML → Markdown step: trafilatura strips all tags, scripts, styles, navigation, and ads, keeping only the main content. This cuts 598.2 GB of uncompressed HTML down to 21.6 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 68.1%.
 
-End to end: ~192.9 GB of raw gzipped WARCs becomes **6.6 GB of Parquet** — a **96.6% total reduction** — containing 4,644,112 clean markdown documents.
+End to end: ~201.0 GB of raw gzipped WARCs becomes **6.9 GB of Parquet** — a **96.6% total reduction** — containing 4,837,961 clean markdown documents.
 
 ### Processing Times
 
-Pipeline timings across 238 shards of CC-MAIN-2026-08:
+Pipeline timings across 248 shards of CC-MAIN-2026-08:
 
 ```
-Download (raw WARC)        ████████████████████████  total 8h 11m 17s    avg 2m 3s
-Convert  (HTML → MD)       █░░░░░░░░░░░░░░░░░░░░░░░  total 16m 2s        avg 4s
-Export   (Parquet)          ████░░░░░░░░░░░░░░░░░░░░  total 1h 37m 56s    avg 24s
-Publish  (HuggingFace)      █████████░░░░░░░░░░░░░░░  total 3h 13m 30s    avg 48s
+Download (raw WARC)        ████████████████████████  total 8h 35m 21s    avg 2m 4s
+Convert  (HTML → MD)       █░░░░░░░░░░░░░░░░░░░░░░░  total 16m 2s        avg 3s
+Export   (Parquet)          ████░░░░░░░░░░░░░░░░░░░░  total 1h 43m 19s    avg 24s
+Publish  (HuggingFace)      ████████████░░░░░░░░░░░░  total 4h 32m 56s    avg 1m 6s
 ```
 
 ### Dataset Charts
 
-![Total size: HTML vs Markdown vs Parquet](charts/totals_chart.png)
-
 ![Compression breakdown](charts/compression_pie.png)
 
-![Size per shard: HTML vs Markdown](charts/size_chart.png)
+![Size per shard: HTML vs Parquet](charts/size_chart.png)
 
 ![Pipeline time per shard](charts/timing_chart.png)
 

data/CC-MAIN-2026-08/00886.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5c2e162ce81e2580cb1022b60d1ee0dd03ca61136e77825ef95347d73294fd77
+size 29711500

stats.csv

@@ -54,6 +54,7 @@ CC-MAIN-2026-08,51,19297,2556393249,92698482,30113318,2026-03-13T09:54:53Z,172,0
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 CC-MAIN-2026-08,54,19483,2558749188,95680427,29738982,2026-03-13T10:04:53Z,123,0,25,0
+CC-MAIN-2026-08,55,19811,2639871700,95584061,30186548,2026-03-13T10:08:46Z,203,0,28,0
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@@ -98,6 +99,8 @@ CC-MAIN-2026-08,141,19444,2573937003,90095043,29226257,2026-03-13T09:54:28Z,194,
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+CC-MAIN-2026-08,145,19411,2578264098,98409544,31288259,2026-03-13T10:05:35Z,105,0,27,0
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@@ -170,6 +173,7 @@ CC-MAIN-2026-08,428,19661,2602153067,94878072,30397597,2026-03-13T09:54:35Z,207,
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 CC-MAIN-2026-08,431,19413,2548907034,94526535,29610662,2026-03-13T10:04:44Z,141,0,24,0
+CC-MAIN-2026-08,432,19238,2571728032,91270409,28904924,2026-03-13T10:07:44Z,130,0,48,0
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@@ -208,6 +212,7 @@ CC-MAIN-2026-08,723,19590,2541660499,94658665,29842729,2026-03-13T09:54:30Z,193,
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+CC-MAIN-2026-08,886,19392,2590108194,93901267,29711500,2026-03-13T10:07:54Z,142,0,22,0