Google dance - The index update of google
Skill Level: Novice
Article by: eFactory

The Technical Background of the Google Dance

The Google search engine pulls its results from more than 10,000 servers which are which are simple Linux PCs that are used by Google for reasons of cost. Naturally, an index update cannot be proceeded on all those servers at the same time. One server after the other has to be updated with the new index.

Many webmasters think that, during the Google Dance, Google is in some way able to control if a server with the new index or a server with an old index responds to a search query. But, since Google's index is inverse, this would be very complicated. As we will show below, there is no such control within the system. In fact, the reason for the Google Dance is Google's way of using the Domain Name System (DNS).

Contents

• The Technical Background of the Google Dance
• Google Dance and DNS
• IP Addresses and Domains of Google's Data Centers
• The Google Dance Test Domains www2 and www3
• The New PageRank Values during the Google Dance

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