When errors occur on a server among multiple servers, the work which is being processed on the server will be handled on a different server in the same group.
Ongoing program service : Because automatic failover is possible without the intervention of an administrator, services always remain online state and clients do not have to stop using service.
Efficient Load Balancing: Each node is able to adjust the traffic weights so you can adjust the throughput according to the specifications of each node.
Acquisition costs reduction: You can reduce the cost because the increase or decrease of server can be adjusted flexibly according to load of service. (It is possible to add up to 32 nodes)