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Pourquoi Google est-il tellement plus rapide qu'une recherche sur disque dur ?

ayi

Quand je search a file on my HD in Windows 7 or Windows XP it takes some minutes to finish the process. If I fill in a search term in Google, the answer is on my screen in milliseconds

Comment est-il possible for Google to search the Internet, which is many times larger than my disque dur, faster than my OS can search my computer? Is it only a matter of computing power and the right algorithm?

ayi

Google is not searching the internet: it is searching an index. Google has huge server farms which are constantly scanning and indexing the internet. This process takes beaucoup de time, just like the search of your unindexed disque dur. In Windows 7, there is an option to index your disque durs. This process takes some time at first but once it is up and running the results of a search will be instantaneous.

Si vous voulez to know more about how the Google search works vous pouvez read Google's article "How Search Works" or read the article "How Stuff Works: How Google Works".