Global server load balancer apparatus and method for dynamically controlling time-to-live

A method for controlling a time-to-live (TTL) value which is performed in a global server load balancer (GSLB) apparatus for performing load balancing among a plurality of local servers, the method comprising:

• receiving a query message from a domain name system (DNS) server;
• selecting a local server from the plurality of local servers;
• collecting state information of the GSLB apparatus and calculating a load of the GSLB apparatus from the collected state information;
• updating a TTL value of the GSLB apparatus based on the calculated load;
• and
• transmitting a response message comprising information about the selected local server and the updated TTL value, to the DNS server.

A computer program which is combined with hardware and stored in a non-transitory computer readable recording medium, the program configured to execute:

• receiving a query message from a domain name system (DNS) server;
• selecting a local server from a plurality of local servers;
• collecting state information of a global server load balancer (GSLB) apparatus and calculating a load of the GSLB apparatus from the collected state information;
• updating a time-to-live (TTL) value of the GSLB apparatus based on the calculated load;
• and
• transmitting a response message comprising information about the selected local server and the updated TTL value to the DNS server.