Data storage method and system

摘要

A method and computer system is provided for storing a data file in a peer-to-peer network of computer systems according to a selectable service level. Each computer system offers storage services at one of a set of service levels, the method comprising assigning to each of the computer systems respective peer identifiers from a metric space in such a way that the distance between peer identifiers of computer systems offering storage at the same service level is smaller than between peer identifiers of computer systems offering storage at different service levels.