Dentro Google

Cosa c'è dentro la più grande struttura informatica del mondo: quasi mezzo milione di server !!!

Estimated 450,000 low-cost commodity servers in 2006

In 2005 Google indexed 8 billion web pages. By now, who knows?

Currently there over 200 GFS clusters at Google. A cluster can have 1000 or even 5000 machines. Pools of tens of thousands of machines retrieve data from GFS clusters that run as large as 5 petabytes of storage. Aggregate read/write throughput can be as high as 40 gigabytes/second across the cluster.

Currently there are 6000 MapReduce applications at Google and hundreds of new applications are being written each month.

BigTable scales to store billions of URLs, hundreds of terabytes of satellite imagery, and preferences for hundreds of millions of users.

Fonte http://highscalability.com/google-architecture