Microsoft revealed at NA TechEd that its Bing search engine is currently comprised of nearly 300 petabytes of data and that close to a 1 terabyte of data is added each day:
This massive amount of data goes to show that creating a search engine, is not an easy task. Gathering this amount of information is surely critical to delivering accurate and the best possible search results on the first query. Microsoft also said that Bing is now running on Server 2012 RC, which was announced previously, but wanted to hit home that Microsoft battle tests all of its products before pushing them out in to the field.
