1. A search system, comprising: a first tier of computing components to store a first set of search data related to a set of documents; a second tier of computing components to store a second set of search data related to the set of documents; and a query logic to receive a query and to locate a set of items relevant to the query by selectively progressively relaxing a search across one or more of, the first set of search data, and the second set of search data, until a search threshold is met.