Google's Supplemental Index

August 27, 2003

It was all very predictable, really. Overture announces that their AlltheWeb search index has reached a record high 3.2 billion entries (see below), and a few days later Google puts up a new figure on their home page: 3.3 billion.

Actually, the quality of search results is not in itself directly related to the size of the database, although a larger index may help you find some odd pages tucked away far back in the Internet. However, size counts a lot publicity wise, so we expect new record breaking attempts shortly.

Not only has Google increased its regular index -- it has also added a new experimental "supplemental" database.

Google says that "Google augments results for difficult queries by searching a supplemental collection of web pages. Results from this index are marked in green as 'Supplemental.'"

Gary Price has done some testing, and found for instance some "supplemental results" doing this query (See the last results on that page).

It is unclear what determines a web page's status as "supplemental", although we suppose these are pages of a more obscure nature.

Source: Pandia

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