In June 2010, Google released its new index, Caffeine. Google's old index was several layers, some of which would update more frequently than others. The main layer would update about every two weeks. Caffeine takes a different approach. It analyzes the web in small portions on a continuous basis, so information is constantly being updated. This allows users to get the most recent and accurate search results when using Google. The following image demonstrates the difference between the old index and Caffeine.
Just to give you a visual of how much information is stored in Caffeine:
- If Caffeine were a pile of paper, it would grow 3 miles taller every second
- It would take 625,000 of the largest iPods to store the same amount of information stored in Caffeine