Two supposedly new approaches to distributed

computing have emerged in the past few years, both

claiming to address the problem of organizing largescale

computational societies: peer-to-peer (P2P) [15,

36, 49] and Grid computing [21]. Both approaches

have seen rapid evolution, widespread deployment,

successful application, considerable hype, and a

certain amount of (sometimes warranted) criticism.

The two technologies appear to have the same final

objective—the pooling and coordinated use of large

sets of distributed resources—but are based in

different communities and, at least in their current

designs, focus on different requirements. -Two　supposedly　new　approaches　to　distributed

computing　have　emerged　in　the　past　few　years,　both

claiming　to　address　the　problem　of　organizing　largescale

computational　societies: peer-to-peer　(P2P)　[15,

36,　49]　and　Grid　computing　[21].　Both　approaches

have　seen　rapid　evolution,　widespread　deployment,

successful　application,　considerable　hype,　and　a

certain　amount　of　(sometimes　warranted)　criticism.

The　two　technologies　appear　to　have　the　same　final

objective—the　pooling　and　coordinated　use　of　large

sets　of　distributed　resources—but　are　based　in

different　communities　and,　at　least　in　their　current

designs, focus on different requirements.