Linux Virtual Server

A virtual server is a highly scalable and available server built on a cluster of real servers that is fully transparent to end users, so the cluster system works like a single high-performance virtual server. The real servers and the load balancers may be interconnected by either high-speed LAN or by geographically dispersed WAN.

Flexible and transparent, the load balancers can dispatch requests to the different servers and make parallel services of the cluster to appear as a virtual service on a single IP address. Request dispatching can use IP load balancing technologies or application-level load balancing technologies. To increase scalability, nodes can be transparently added or removed in the cluster. High availability is provided by detecting node or daemon failures and reconfiguring the system appropriately.

Example Load Balancing Solution

With two purpose-built load balancers (layer 4-7 application switches) the solution in this example provides acceleration, security and high availability for mission-critical applications.

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