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Linux Journal: Linux on Carrier Grade Web Servers

Mar 18, 2001, 15:09 (0 Talkback[s])
(Other stories by Makan Pourzandi, Ibrahim Haddad)

"ARIES (Advanced Research on Internet E-Servers) is a project that started at Ericsson Research Canada in January 2000. It aimed at finding and prototyping the necessary technology to prove the feasibility of a clustered internet server that demonstrates telecom-grade characteristics using Linux and open-source software as the base technology. These characteristics feature guaranteed continuous availability, guaranteed response time, high scalability and high performance."

"Traffic distribution was one of the main research topics because we needed a software-based solution that was very reliable, high performance and yet very scalable to distribute web traffic among multiple CPUs within the cluster. The first activity we conducted was to survey the Open Source community and see what solutions were already implemented, try them out on our experimental Linux cluster and see which solution best met our requirements (or part of them)."

"This article covers our experience with the Linux Virtual Server (LVS), a software package that provides traffic distribution on top of Linux. We will explain the architecture, operation and algorithms of LVS and describe our test system and benchmarking environment as well as the experiments we conducted to test LVS's robustness and scalability."

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