The round-robin algorithm is certainly the most known of all the strategies. It considers the list of available members of the cluster (the servers) as a ring and continuously iterates over this ring each time a request comes.
For instance, if you have three servers (server1.company.com, server2.company.com, server3.company.com), here is how the first requests will be served:
|
Request number
|
Selected server
|
|
1
|
server1.company.com
|
|
2
|
server2.company.com
|
|
3
|
server3.company.com
|
|
4
|
server1.company.com
|
|
5
|
server2.company.com
|
|
6
|
server3.company.com
|
|
7
|
server1.company.com
|
|
...
|
...
|
You will note that to have a fair distribution, the load-balancer strategy must lock or synchronize ...
