There has been research about how many servers googles has. The fact is that outside Google, no one exactly knows how many servers the Google company has. However, an estimate carried out in 2006 indicated that Google had approximately 450,000 servers. An analyst firm called Gartner also estimated that the servers were one million. These estimates were made over 10 years ago and considering that both from a long time ago, and Google has expanded its data centers since then, it's not irrational to assume that today, Google has at least one million servers worldwide.
If these estimates are correct, it means that google possesses more than 2% of all servers worldwide. Even if Google is all about the internet, calling it an internet giant is like an understatement because what they possess. While Google is a prominent user of computer servers, less than 1% of electricity used by data centers worldwide is attributable to the company's data center operations. Actually, this is the first time that Google has revealed precise details about their total data center electricity use. That only means that Google may be running its global data center network in an energy footprint of about 220 megawatts of power.
A data analyst Koomey observes that Google's data center electricity use is about 0.01% of the total usage of electricity in the world and less than 1 percent of the global data center electricity use. This was in 2010. Nonetheless, these numbers represent educated guesses generalized from the company's information. The results have been brought about by a function of the higher infrastructure competency of Google's facilities compared to in-house data centers, which is consistent with efficiencies of other cloud installations used for computing. It also replicates lower electricity use per server for the highly optimized Google servers.
The Google's server infrastructure is divided into several types. Each type is designed and assigned to a different purpose. Below are examples of servers.
They coordinate the implementation of enquiries sent by the users. They then format the result into an HTML page. This execution includes sending questions to the index servers, unifying the results, calculating their rank, finding a summary for each hit with the help of the document server. Then, they ask for suggestions from the spelling servers, and finalize by getting a list of advertisements from the adverts server.
These servers are permanently devoted to spidering the Web. The web crawler in Googler is known as the Googlebot. They function by informing the index and document databases and later apply the Google's procedures to assign ranks to pages.
It contains a set of index debris. They return a list of document IDs known as docid. By this, the documents corresponding to a certain docid contains the inquiry word. These servers need less disk space but they suffer the greatest CPU capability.
As the name suggests, these servers store documents. Each document is deposited on dozens of document servers. When performing any search, a document server returns a summary for the document based on the query words. These servers can also fetch the broad document when asked. Hence, they need more disk space.
They manage advertisements offered by several services like AdWords and AdSense.
These servers make recommendations about the spelling of queries.
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