How do search engines consolidate query results from the same domain?

Question

If a search query returns multiple results from the same domain, how can we restrict showing only two or three results from the same domain. We considered using domain ID's and tying them to our document ID's, but believe that our index would be significantly larger and the process slower.

If linking domain ID to a document ID in the index would slow the process down too much, can you think of any other way to present a search so that the pages from the same domain is presented only a maximum of 3 times on a search query. Can this be done in the search algorithm stage without domain IDs?

Answer 1

YOU CAN SAVE YOUR SERCH OPTIONS ON SEARCH ENIGINS LIKE ON YAHOO FOR ADULT CONTENT ETC