Last update: Apr 1, 2000
Speaker: Alberto PaceA new architecture based on a pool of load-balanced web servers has been deployed to allow the evolution of the CERN Web Services. The new architecture introduces the concept of "logical URL address" which is translated to the physical URL through a database lookup which gives the necessary independence from the hardware layout to move web sites across servers and to avoid broken links or unnecessary redirections. Complete backward compatibility is kept with the existing www url addresses and all "locally managed servers" that are outside the control of the central services can also be integrated in the new web namespace for CERN. The new architecture allows differentiation of the various servers in the pool to offer specific or specialized services (high-availability servers for static html only, CGI servers, Gateways to AFS or Novell) if necessary.
This paper gives a technical description of the infrastructure in place and then will review the services offered to CERN users. The solutions retained to offer support for automated web site registration, electronic forms, database web connectors, scripting, CGI interfaces, SSL, server load balancing, authentication and access control for Web authors and Web developers will be explained.
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