what does lvs mean

LVS is the abbreviation of Linux Virtual Server, which means Linux virtual server and is a virtual server cluster system. This project was established by Dr. Zhang Wensong in May 1998. It is one of the earliest free software projects in China.

LVS is the abbreviation of Linux Virtual Server, which means Linux virtual server and is a virtual server cluster system. This project was established by Dr. Zhang Wensong in May 1998. It is one of the earliest free software projects in China.

Purpose:

• Use cluster technology and Linux operating system to implement a high-performance, high-availability server.

• Very good scalability (Scalability)

• Very good reliability (Reliability)

• Very good reliability Manageability.

Features:

Several structures of scalable network services, they all require a front-end load scheduler (or multiple main from backup). We first analyze the main technologies for implementing virtual network services and point out that IP load balancing technology is the most efficient among load scheduler implementation technologies. Among the existing IP load balancing technologies, a group of servers are mainly formed into a high-performance, highly available virtual server through Network Address Translation, which we call VS/NAT technology (Virtual Server via Network). Address Translation). Based on the analysis of the shortcomings of VS/NAT and the asymmetry of network services, we proposed the method VS/TUN (Virtual Server via IP Tunneling) to implement virtual servers through IP tunnels, and the method VS to implement virtual servers through direct routing. /DR (Virtual Server via Direct Routing), they can greatly improve the scalability of the system. VS/NAT, VS/TUN and VS/DR technologies are three IP load balancing technologies implemented in LVS clusters.

Advantages:

1. Open source, free

2. You can find some related technical resources on the Internet

3. Some advantages of software load balancing

Disadvantages:

1. The core is that there is no reliable support service and no one is responsible for its results;

2. The function is relatively simple, and the load balancing ability to support complex applications is poor, such as fewer algorithms;

3. Turning on the tunnel mode requires recompiling the kernel;

4. The configuration is complex;

5. It is mainly used in LINUX. There is no version specifically for WINDOWS. However, it can be configured to make windows a real server in the LVS cluster (in win2003 and win2008).

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