官网：http://www.linux-vs.org/

What is virtual server?

http://www.linux-vs.org/whatis.html

Virtual server is a highly scalable and highly available server built on a cluster of real servers. The architecture of server cluster is fully transparent to end users, and the users interact with the cluster system as if it were only a single high-performance virtual server. 

Why virtual server?

http://www.linux-vs.org/why.html

How virtual server works?

http://www.linux-vs.org/how.html

• Virtual Server via NAT
• Virtual Server via IP Tunneling
• Virtual Server via Direct Routing

General Architecture of LVS Clusters

http://www.linux-vs.org/architecture.html

High Availability

http://www.linux-vs.org/HighAvailability.html

• Using Piranha to build highly available LVS systems
• Using Keepalived to build highly available LVS systems
• Using UltraMonkey to build highly available LVS systems
• Using heartbeat+mon+coda to build highly available LVS systems
• Using heartbeat+ldirectord to build highly available LVS systems