Blog

The latest news, interviews, technologies, and resources.

Filter by Category or Search by Title

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
OSCON 2012

OSCON 2012

We're just one month away from one of the biggest and most exciting events of the year, O'Reilly's Open Source Convention (OSCON). This year's conference will be held July 16th-20th in Portland, Oregon.
Learn Hadoop and get a paper published

Learn Hadoop and get a paper published

We're looking for students who want to try out the Apache Hadoop platform and get a technical report published.
Big Data Week: meetups in SF and around the world

Big Data Week: meetups in SF and around the world

Big Data Week aims to connect data enthusiasts, technologists, and professionals across the globe through a series of meet-ups. The idea is to build community among groups working on big data and to spur conversations about relevant topics ranging from technology to commercial use cases.
Twelve steps to running your Ruby code across five billion web pages

Twelve steps to running your Ruby code across five billion web pages

The following is a guest blog post by Pete Warden, a member of the Common Crawl Advisory Board. Pete is a British-born programmer living in San Francisco. After spending over a decade as a software engineer, including 5 years at Apple, he’s now focused on a career as a mad scientist.
Web Data Commons

Web Data Commons

For the last few months, we have been talking with Chris Bizer and Hannes Mühleisen at the Freie Universität Berlin about their work and we have been greatly looking forward the announcement of the Web Data Commons.
Common Crawl's Advisory Board

Common Crawl's Advisory Board

As part of our ongoing effort to grow Common Crawl into a truly useful and innovative tool, we recently formed an Advisory Board to guide us in our efforts. We have a stellar line-up of advisory board members who will lend their passion and expertise in numerous fields as we grow our vision.
Video Tutorial: MapReduce for the Masses

Video Tutorial: MapReduce for the Masses

Learn how you can harness the power of MapReduce data analysis against the Common Crawl dataset with nothing more than five minutes of your time, a bit of local configuration, and 25 cents.
Gil Elbaz and Nova Spivack on This Week in Startups

Gil Elbaz and Nova Spivack on This Week in Startups

Nova and Gil, in discussion with host Jason Calacanis, explore in depth what Common Crawl is all about and how it fits into the larger picture of online search and indexing. Underlying their conversation is an exploration of how Common Crawl's open crawl of the web is a powerful asset for educators, researchers, and entrepreneurs.
Video: This Week in Startups - Gil Elbaz and Nova Spivack

Video: This Week in Startups - Gil Elbaz and Nova Spivack

Nova and Gil, in discussion with host Jason Calacanis, explore in depth what Common Crawl is all about and how it fits into the larger picture of online search and indexing.
MapReduce for the Masses: Zero to Hadoop in Five Minutes with Common Crawl

MapReduce for the Masses: Zero to Hadoop in Five Minutes with Common Crawl

Common Crawl aims to change the big data game with our repository of over 40 terabytes of high-quality web crawl information into the Amazon cloud, the net total of 5 billion crawled pages.
Common Crawl Discussion List

Common Crawl Discussion List

We have started a Common Crawl discussion list to enable discussions and encourage collaboration between the community of coders, hackers, data scientists, developers and organizations interested in working with open web crawl data.
Answers to Recent Community Questions

Answers to Recent Community Questions

In this post we respond to the most common questions. Thanks for all the support and please keep the questions coming!
Common Crawl Enters A New Phase

Common Crawl Enters A New Phase

A little under four years ago, Gil Elbaz formed the Common Crawl Foundation. He was driven by a desire to ensure a truly open web. He knew that decreasing storage and bandwidth costs, along with the increasing ease of crunching big data, made building and maintaining an open repository of web crawl data feasible.
Video: Gil Elbaz at Web 2.0 Summit 2011

Video: Gil Elbaz at Web 2.0 Summit 2011

Hear Common Crawl founder discuss how data accessibility is crucial to increasing rates of innovation as well as give ideas on how to facilitate increased access to data.

Common Crawl Blog

March 2017 Crawl Archive Now Available

April 4, 2017

The crawl archive for March 2017 is now available! The archive contains 3.07 billion+ web pages and over 250 TiB of uncompressed content.

Read More...

February 2017 Crawl Archive Now Available

March 10, 2017

The crawl archive for February 2017 is now available! The archive contains 3.08 billion+ web pages and over 250 TiB of uncompressed content.

Read More...

January 2017 Crawl Archive Now Available

February 1, 2017

The crawl archive for January 2017 is now available! The archive contains more than 3.14 billion web pages and about 250 TiB of uncompressed content.

Read More...

December 2016 Crawl Archive Now Available

December 16, 2016

The crawl archive for December 2016 is now available! The archive contains more than 2.85 billion web pages.

Read More...

October 2016 Crawl Archive Now Available

November 7, 2016

The crawl archive for October 2016 is now available! The archive contains more than 3.25 billion web pages.

Read More...

September 2016 Crawl Archive Now Available

October 7, 2016

The crawl archive for September 2016 is now available! The archive contains more than 1.72 billion web pages.

Read More...

News Dataset Available

October 4, 2016

We are pleased to announce the release of a new dataset containing news articles from news sites all over the world.

Read More...

Data Sets Containing Robots.txt Files and Non-200 Responses

September 16, 2016

Together with the crawl archive for August 2016 we release two data sets containing robots.txt files and server responses with HTTP status code other than 200 (404s, redirects, etc.) The data may be useful to anyone interested in web science, with various applications in the field.

Read More...

August 2016 Crawl Archive Now Available

September 16, 2016

The crawl archive for August 2016 is now available! The archive contains more than 1.61 billion web pages.

Read More...

July 2016 Crawl Archive Now Available

August 9, 2016

The crawl archive for July 2016 is now available! The archive contains more than 1.73 billion web pages.

Read More...

June 2016 Crawl Archive Now Available

July 14, 2016

The crawl archive for June 2016 is now available! The archive contains more than 1.23 billion web pages.

Read More...

May 2016 Crawl Archive Now Available

June 19, 2016

The crawl archive for May 2016 is now available! More than 1.46 billion web pages are in the archive.

Read More...

April 2016 Crawl Archive Now Available

May 24, 2016

The crawl archive for April 2016 is now available! More than 1.33 billion webpages are in the archive.

Read More...

Welcome, Sebastian!

May 13, 2016

It is a pleasure to officially announce that Sebastian Nagel joined Common Crawl as Crawl Engineer in April. Sebastian brings to Common Crawl a unique blend of experience, skills, knowledge (and enthusiasm!) to complement his role and the organization.

Read More...

February 2016 Crawl Archive Now Available

February 29, 2016

As an interim crawl engineer for CommonCrawl, I am pleased to announce that the crawl archive for February 2016 is now available! This crawl archive holds more than 1.73 billion urls.

Read More...

November 2015 Crawl Archive Now Available

December 18, 2015

As an interim crawl engineer for CommonCrawl, I am pleased to announce that the crawl archive for November 2015 is now available! This crawl archive is over 151TB in size and holds more than 1.82 billion urls.

Read More...

September 2015 Crawl Archive Now Available

November 16, 2015

As an interim crawl engineer for CommonCrawl, I am pleased to announce that the crawl archive for September 2015 is now available! This crawl archive is over 106TB in size and holds more than 1.32 billion urls.

Read More...

August 2015 Crawl Archive Available

October 10, 2015

The crawl archive for August 2015 is now available! This crawl archive is over 149TB in size and holds more than 1.84 billion webpages.

Read More...

Web Image Size Prediction for Efficient Focused Image Crawling

August 20, 2015

This is a guest blog post by Katerina Andreadou, a research assistant at CERTH, specializing in multimedia analysis and web crawling. In the context of using Web image content for analysis and retrieval, it is typically necessary to perform large-scale image crawling. In our web image crawler setup, we noticed that a serious bottleneck pertains to the fetching of image content, since for each web page a large number of HTTP requests need to be issued to download all included image elements.

Read More...

July 2015 Crawl Archive Available

August 15, 2015

The crawl archive for June 2015 is now available! This crawl archive is over 145TB in size and holds more than 1.81 billion webpages.

Read More...

June 2015 Crawl Archive Available

July 23, 2015

The crawl archive for June 2015 is now available! This crawl archive is over 131TB in size and holds more than 1.67 billion webpages.

Read More...

May 2015 Crawl Archive Available

July 8, 2015

The crawl archive for May 2015 is now available! This crawl archive is over 159TB in size and holds more than 2.05 billion webpages.

Read More...

April 2015 Crawl Archive Available

May 28, 2015

The crawl archive for April 2015 is now available! This crawl archive is over 168TB in size and holds more than 2.11 billion webpages.

Read More...

March 2015 Crawl Archive Available

May 20, 2015

The crawl archive for March 2015 is now available! This crawl archive is over 124TB in size and holds more than 1.64 billion webpages.

Read More...

Announcing the Common Crawl Index!

April 8, 2015

This is a guest post by Ilya Kreymer, a dedicated volunteer who has gifted large amounts of time, effort and talent to Common Crawl. He previously worked at the Internet Archive and led the Wayback Machine development, which included building large indexes of WARC files.

Read More...