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June 19, 2016

May 2016 Crawl Archive Now Available

Note: this post has been marked as obsolete.
The crawl archive for May 2016 is now available! More than 1.46 billion web pages are in the archive.
Sebastian Nagel
Sebastian Nagel
Sebastian is a Distinguished Engineer with Common Crawl.

The crawl archive for May 2016 is now available! More than 1.46 billion web pages are in the archive, which is located in the commoncrawl bucket at crawl-data/CC-MAIN-2016-22/.

Data Type File List #Files Total Size
Compressed (TiB)
Segments segment.paths.gz 100
WARC warc.paths.gz 24500 22.95
WAT wat.paths.gz 24500 8.55
WET wet.paths.gz 24500 3.73
URL index files cc-index.paths.gz 302 0.09
Columnar URL index files cc-index-table.paths.gz 300 0.10

To assist with exploring and using the dataset, we provide gzipped files that list:

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-2016-22/.

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 Moz for donating a seed list of 400 Million URL's to enhance the Common Crawl. The seeds from Moz were used for the May crawl in addition to the seeds from the preceding crawl. Moz URL data will be incorporated into future crawls as well.

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 and packages.

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: 

Charset Detection Bug in WET Records

Originally reported by: 
Javier de la Rosa
Permalink

The charset detection required to properly transform non-UTF-8 HTML pages in WARC files into WET records didn't work before November 2016 due to a bug in IIPC Web Archive Commons (see the related issue in the CC fork of Apache Nutch).  There should be significantly fewer errors in all subsequent crawls. Originally discussed here in Google Groups.

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.