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On 16 August 2013, every Google service went down for five minutes; that is from 22:52 to 22:57 UTC. The outage caused internet traffic to drop forty percent worldwide. [9] Between 23:51 and 23:52 UTC, 50–70% of requests to Google received errors. It has been estimated that the blackout could cost Google around £330,000. [9]
A Google cluster has thousands of servers, and once the client has connected to the server additional load balancing is done to send the queries to the least loaded web server. This makes Google one of the largest and most complex content delivery networks. [94] Google has numerous data centers scattered around the world.
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In May, 2015, GWS was ranked as the fourth most popular web server on the internet after Apache, nginx and Microsoft IIS, powering an estimated 7.95% of active websites. [4] Web page requests on most Google pages provide "gws" (without a version number) in the HTTP header as an indication of the web server software being used.
(Unofficial) Google Refid used by Google NTP servers as time4.google.com For servers on stratum 2 and below, the refid is an encoded form of the upstream time server's IP address. For IPv4, this is simply the 32-bit address; for IPv6, it would be the first 32 bits of the MD5 hash of the source address.
Google Cloud Platform is a part [8] of Google Cloud, which includes the Google Cloud Platform public cloud infrastructure, as well as Google Workspace (G Suite), enterprise versions of Android and ChromeOS, and application programming interfaces (APIs) for machine learning and enterprise mapping services.
Google has data centers in North and South America, Asia, and Europe. [304] There is no official data on the number of servers in Google data centers; however, research and advisory firm Gartner estimated in a July 2016 report that Google at the time had 2.5 million servers. [305]
The NTP pool is a dynamic collection of networked computers that volunteer to provide highly accurate time via the Network Time Protocol to clients worldwide. The machines that are "in the pool" are part of the pool.ntp.org domain as well as of several subdomains divided by geographical zone and are distributed to NTP clients via round-robin DNS.