A Distributed Scalable Web Server and Its Program Visualization in Multiple Platforms

A fbidamental trend for servers in network-cenlric comp t ing eiwironitients is to evolve from traditional database and transaction servers to iirformarion distribution arid haiidling systems. In uddirion to dociiments written iiil the HyperTexr Markup Luny riaye (HTML), data stored in other forms can be retrieved tliroiigh the Common Gatmuy 111terface (CCI). A sigriijicunt p~vforrrrance bottleneck is the iiiitiulization and setiq) phase for a CtiI process to gain access to a buckend swer. I n this paper, we desr-ribe rhe design and ii?i~,lemeiitcatioii cf a distribiued Web server for CGI pioocesses to acqiiire services cffi&ntly. A Connection Manager Daemon (CMD) is developed to provide i,t iiirmber os climes, which are c(wnected to buckend servers to diminure initializatioii cosds for inconling requests. A Cache Manuger is iviplemenr cd to speedup response tinie in case c~frepeated reqiiesrs. M+ also rrnc’e arid monitor rhr Connecl ion Manu<qer Daenioii us well as its clients using itwended 1717; (Unified Truce EII vironment) tools, andpresent itsperjorniurice unubysis and \-isicalizution. The platforms where MY i ~ o r i d i i c ~ this srirdy include a single-node workstatiori, a i.lirster of worhsrution:;, and an IBM SiululJle Parallel (SP) system.