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Caffeine Kick

If you have not caught the latest technology buzz, you may have missed the latest changes at Google. On June 8th, Google announced the completion of a new indexing system called Caffeine.

Caffeine promises to add a refreshing kick to search results.

Unlike the client side changes we covered a few weeks ago, the latest changes are behind the scenes. In its ongoing efforts to keep up with evolving web use, Google has implemented Caffeine to change the way the web is indexed.

To understand the improvements Caffeine represents it is necessary to grasp what happens when you do a web search using a search engine. You are not actually searching the web, but the web index that the search engine has created through the use of spiders. Spiders visit a page, and follow each link on that page and links on subsequent pages, creating an index. How often a spider visits a site determines how soon new and updated content is available to searchers.

Google's old index was divided into layers, with the main layer receiving more frequent updates than lesser layers. The old index also relied on every web page being analyzed before updating the index. This created delays before new content was indexed.

Caffeine operates in a different way. It searches, analyzes and updates the index continuously.

In her blog, Carrie Grimes, a Google software engineer, explains "Caffeine processes hundred of thousands of pages in parallel" every second. With its strong foundation, Caffeine promises to allow Google to keep pushing the boundaries of search engine improvements, while satisfying the increasing demands of users.

Date: 06.10.2010

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