Lab4WS: A Testbed for Web Services
Alan Massaru Nakai, Edmundo R. M. Madeira, Luiz Eduardo Buzato · 2009
Abstract—Web services are increasingly being deployed in clusters located at geographically distributed datacenters linked via the Internet. Ideally, before the actual deployment of such a complex service, engineers would like to have a way to quantitatively analyze aspects such as performance, availability, and the load balancing achieved by the different solutions available. In this paper we present the Lab4WS, a testbed designed to reduce the difficulties associated with the evaluation of LAN and/or WAN deployed web services. The key features of Lab4WS are illustrated by using it to compare four WAN load balancing mechanisms (DNS-based, server-based, dispatcher-based, and client-based). I.