Patent ID: 8180921
Filing Date: 2012-05-15
Classification: G06F

Abstract:
1. A method, comprising: receiving a single DNS (Domain Name Service) request from a client's Domain Name Server; in response to the single DNS request from the client's Domain Name Server, applying a series of load balancing methods, wherein the series of load balancing methods includes a first load balancing method and a second load balancing method to be performed after the first load balancing method, wherein: the first load balancing method is based on at least one performance metric of respective Domain Name Service servers available to respond to the single DNS request; the second load balancing method comprises coordinating multiple ones of the Domain Name Service servers available to respond to the DNS request, to respond to the single DNS request at the same time by simultaneously sending, to the client's Domain Name Server, DNS responses to the single DNS request; wherein the first load balancing method comprises determining a strict subset of the sites available to respond to the DNS request; and wherein the multiple sites of the second load balancing method are the strict subset of the sites.