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August 9, 2021

July/August 2021 crawl archive now available

The crawl archive for July/August 2021 is now available! The data was crawled July 23 – August 6 and contains 3.15 billion web pages or 360 TiB of uncompressed content. It includes page captures of 1 billion new URLs, not visited in any of our prior crawls.
Sebastian Nagel
Sebastian Nagel
Sebastian is a Distinguished Engineer with Common Crawl.

The crawl archive for July/August 2021 is now available! The data was crawled July 23 – August 6 and contains 3.15 billion web pages or 360 TiB of uncompressed content. It includes page captures of 1 billion new URLs, not visited in any of our prior crawls.

Data Type File List #Files Total Size
Compressed (TiB)
Segments segment.paths.gz 100
WARC warc.paths.gz 72000 75.34
WAT wat.paths.gz 72000 21.67
WET wet.paths.gz 72000 9.43
Robots.txt files robotstxt.paths.gz 72000 0.14
Non-200 responses non200responses.paths.gz 72000 1.98
URL index files cc-index.paths.gz 302 0.23
Columnar URL index files cc-index-table.paths.gz 900 0.27

Improvements

Archiving of robots.txt files was improved. Robots.txt files are not archived if

  • the robots.txt of the target host does not allow it (in case of a HTTP redirect) or
  • URL filters exclude the entire site, eg. if it's known ahead that a site does not allow crawling or
  • the MIME type is not applicable for robots.txt files (eg. HTML, PDF)

More details are found in the corresponding issue report. The change reduces the size of the robots.txt subset (since August 2016) by removing content which should not contained in this dataset.

Archive Location and Download

The July/August crawl archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2021-31/.

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-2021-31/. Also the columnar index has been updated to contain this 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.

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