Down times directly result in a loss in revenue – the longer a web presence is offline, the higher is the damage for the owner. A redundant web server system prevents such a scenario and secures the availability by distributing the web site content on several physical systems. Thus, in case of a hardware failure you retain the availability of your platform and protect yourself against a loss in revenue. A positive side effect can be realized with a little extra effort by load balancing. Therefore, numerous requests can be distributed optimally to existing resources.