Round robin / weighted round robin
What is Round Robin?
With this load balancing algorithm, incoming requests are distributed to real servers in a sequential manner relative to each real server’s weight.
Servers with a higher weight receive more requests. A server with a weight of 200 will receive 4 times the number of requests than a server with a weight of 50. Weightings are relative, so it makes no difference if real server #1 and #2 have weightings of 50 and 100 respectively or 5 and 10. The default weight for new real servers is 100.