Load balancing among multiple endpoint computing systems of a domain

A system for load balancing among multiple endpoint computing systems of a domain, the system comprising:

• memory;
• multiple endpoint computing systems servicing the domain and each being addressable by a different network address;
• and
• a traffic manager stored in the memory and executable to:
• receive a domain name server (DNS) request to access the domain;
• identify a target endpoint for the DNS request from a pool of the multiple endpoint computing systems based on routing logic for the domain;
• obtain a load metric for the target endpoint and a load metric for at least one other endpoint computing system of the multiple endpoint computing systems;
• determine whether the load metric for the target endpoint satisfies a first overload condition;
• determine whether the obtained load metric for the at least one other endpoint computing system satisfies a second overload condition;
• and
• redirect a fractional portion of traffic of the domain away from the target endpoint and to the at least one other endpoint computing system of the multiple endpoint computing systems in response to determining that the load metric for the target endpoint satisfies the first overload condition and the at least one other endpoint computing system does not satisfy the second overload condition.

One or more memory devices encoding computer-executable instructions for executing a computer process for load balancing among multiple endpoint computing systems of a domain, the computer process comprising:

• receiving a domain name server (DNS) request to access the domain, each of the multiple endpoint computing systems servicing the domain being addressable by a different network address;
• identifying a target endpoint for the DNS request from a pool of the multiple endpoint computing systems based on routing logic for the domain;
• obtaining a load metric for the target endpoint and a load metric for at least one other endpoint computing system of the multiple endpoint computing systems;
• determining whether the obtained load metric for the target endpoint satisfies a first overload condition;
• determining whether the obtained load metric for the at least one other endpoint computing system satisfies a second overload condition;
• and
• redirecting a fractional portion of traffic of the domain away from the target endpoint and to the at least one other endpoint computing system of the multiple endpoint computing systems in response to determining that the load metric for the target endpoint satisfies the overload condition and to determining that the at least one other endpoint computing system does not satisfy the second overload condition.