Google Technology Overview  

Wednesday, September 02, 2009

We ( Google ) stand unaided in our focus on developing the "perfect search engine," defined by co-founder Larry Page as impressive that "understands exactly what you mean and gives you back precisely what you want." To that end, we have tirelessly pursued innovation and refused to recognize the limitations of existing models. As a result, we developed our serving infrastructure and breakthrough PageRank technology that changed the method searches is conducted.

From the beginning, our developers are familiar in providing the fastest, most precise results required a new kind of server setup. Whereas most search engines ran off a handful of big servers that often slowed under peak loads, ours working linked PCs to quickly find each query's answer. The novelty paid off in faster response times, greater scalability and lower costs. It is an idea that others have since copied, while we have sustained to refine our back-end technology to make it even more efficient.

The software behind our Google searching technology conducts a series of concurrent calculations requiring only a fraction of a second. Traditional search engines rely greatly on how often a word appears on a web page. We use more than 200 signals, including our patented PageRank algorithm, to inspect the entire link structure of the web and determine which pages are most important. We then conduct hypertext-matching analysis to conclude which pages are relevant to the specific search being conducted. By combining overall importance and query-specific relevance, we are able to put the most related and reliable results first.