A Performance Study of Top Mirror Servers

Server replication is commonly used to improve the performance experienced by a large, globally-distributed client base. Based on traces from 193 real mirror servers, we find that the servers with the lowest transfer times for a file maintain very good performance over long periods of time; the average mirror server does not. Servers o ering top service comprised only a small fraction of the total number of servers hosting the file. We offer a server selection technique that identifies the best ...