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January 29, 2018

January 2018 Crawl Archive Now Available

Note: this post has been marked as obsolete.
The crawl archive for January 2018 is now available! The archive contains 3.4 billion web pages and 270 TiB of uncompressed content, crawled between January 16th and Jan 24th.
Sebastian Nagel
Sebastian Nagel
Sebastian is a Distinguished Engineer with Common Crawl.

The crawl archive for January 2018 is now available! The archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2018-05/. It contains 3.4 billion web pages and 270 TiB of uncompressed content, crawled between January 16th and Jan 24th.

Data Type File List #Files Total Size
Compressed (TiB)
Segments segment.paths.gz 100
WARC warc.paths.gz 80000 74.33
WAT wat.paths.gz 80000 21.36
WET wet.paths.gz 80000 9.29
Robots.txt files robotstxt.paths.gz 80000 0.18
Non-200 responses non200responses.paths.gz 80000 3.02
URL index files cc-index.paths.gz 302 0.27
Columnar URL index files cc-index-table.paths.gz 900 0.30

The January crawl contains 1.1 billion new URLs, not contained in any crawl archive before. New URLs are “mined” by

  • extracting and sampling URLs from sitemaps if provided by any of the highest-ranking 100 million hosts taken from the Aug/Sept/Oct 2017 webgraph data set
  • a breadth-first side crawl within a maximum of 4 links (“hops”) away from the home pages of the top 50 million hosts or top 25 million domains of the webgraph dataset
  • a random sample taken from WAT files of the December crawl
  • and the continued and increased donation of URLs from mixnode.com

We were able to further shrink the overlap between successive crawls: the last two monthly archives (December and January) taken together contain content from 6 billion URLs, the last three archives (Nov/Dec/Jan) cover 8 billion unique URLs. To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files.

By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.

The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2018-05/. For more information on working with the URL index, please refer to the previous blog post or the Index Server API. There is also a command-line tool client for common use cases of the URL index. We are grateful to our friends at mixnode for donating a seed list of 400 Million URLs to enhance the Common Crawl. Please donate to Common Crawl if you appreciate our free datasets! We’re also seeking corporate sponsors to partner with Common Crawl for our non-profit work in open data. Please contact info@commoncrawl.org for sponsorship information.

This release was authored by:
No items found.

Erratum: 

Erroneous title field in WAT records

Originally reported by: 
Robert Waksmunski
Permalink

The "Title" extracted in WAT records to the JSON path `Envelope > Payload-Metadata > HTTP-Response-Metadata > HTML-Metadata > Head > Title` is not the content included in the <title> element in the HTML header (<head> element) if the page contains further <title> elements in the page body. The content of the last <title> element is written to the WAT "Title". This bug was observed if the HTML page includes embedded SVG graphics.

The issue was reported by the user Robert Waksmunski:

...and was fixed for CC-MAIN-2024-42 by commoncrawl/ia-web-commons#37.

This erratum affects all crawls from CC-MAIN-2013-20 until CC-MAIN-2024-38.

Erratum: 

Missing Language Classification

Originally reported by: 
Permalink

Starting with crawl CC-MAIN-2018-39 we added a language classification field (‘content-languages’) to the columnar indexes, WAT files, and WARC metadata for all subsequent crawls. The CLD2 classifier was used, and includes up to three languages per document. We use the ISO-639-3 (three-character) language codes.