Linux Virtual Server
LVS official logo
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| Original author(s) | Wensong Zhang |
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| Developer(s) | et al. |
| Initial release | May 1998 |
| Development status | active |
| Written in | C |
| Operating system | Linux |
| Type | load balancing |
| License | GNU General Public License |
| Website | www |
Linux Virtual Server (LVS) is load balancing software for Linux kernel–based operating systems.
LVS is a free and open-source project started by Wensong Zhang in May 1998, subject to the requirements of the GNU General Public License (GPL), version 2. The mission of the project is to build a high-performance and highly available server for Linux using clustering technology, which provides good scalability, reliability and serviceability.
The major work of the LVS project is now to develop advanced IP load balancing software (IPVS), application-level load balancing software (KTCPVS), and cluster management components.
LVS can be used for building highly scalable and highly available network services, such as web, email, media and VoIP services, and integrating scalable network services into large-scale reliable e-commerce or e-government applications. LVS-based solutions already have been deployed in many real applications throughout the world, including .
The LVS components depend upon the Linux Netfilter framework, and its source code is available in the net/netfilter/ipvs subdirectory within the Linux kernel source. LVS is able to handle UDP, TCP layer-4 protocols as well as FTP passive connection by inspecting layer-7 packets. It provides a hierarchy of counters in the /proc directory.
The userland utility program used to configure LVS is called , which requires superuser privileges to run.
LVS implements several balancing schedulers, listed below with the relevant source files:
Commonly used terms include the following:
Setting up a virtual server with two real servers:
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