LVS is a little more complicated. It consists of 4 or more servers, which are configured as either a router server or real server. IP Tunneling - All incoming requests are processed by router, but out going requests are processed by real servers. Good for large LVS clusters. Direct Routing - All incoming requests are processed by router, but out going requests are processed by real servers.
Real servers are on public network which yields higher performance, but lower security.
Capacity is indicated by a user-assigned weight, which is then adjusted upward or downward by dynamic load information. Least Connections - Distribute more jobs to real servers with fewer active connections. Weighted Least Connections - Distribute more jobs to servers with fewer active connections relative to their capacity. Capacity is indicated by a user-assigned weight, which is then adjusted upward or downward by dynamic load information. The RM HA Cluster is then administered via its web-based control panel, Piranha.