DNS Load Balancing
DNS load balancing is to distribute requests to different servers though resolving the domain name to different IP addresses of servers. When a DNS request comes to the DNS server to resolve the domain name, it gives out one of the server IP addresses based on scheduling strategies, such as simple round-robin scheduling or geographical scheduling. This redirects the request to one of the servers in a server group. Once the domain is resolved to one of the servers in specified time-to-live, subsequent requests from the clients using the same local caching DNS server are sent to the same server.
Round Robin DNS Load Balancing
BIND is the most popular implementation of Domain Name System. We can use BIND to build DNS load balancing systems.
Multiple A Records
Multiple SRV Records
Geographical DNS Load Balancing
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