Application of Web Server Benchmark usingudErlang/OTP RII and Linux

摘要

As the web grows and the amount of traffics on theudweb server increase, problems related to performance begin toudappear. Some of the problems, such as the number of users thatudcan access the server simultaneously, the number of requests thatudcan be handled by the server per second (requests per second) toudbandwidth consumption and hardware utilization like memoriesudand CPU. To give better quality of service (QoS), web hostingudproviders and also the system administrators and networkudadministrators who manage the server need a benchmarkudapplication to measure the capabilities of their servers. Later, theudapplication intends to work under Linux/Unix - like platformsudand built using ErlanglOTP RI] as a concurrent orientedudlanguage under Fedora Core Linux 5.0. It is divided into twoudmain parts, the controller section and the launcher section.udController is the core of the application. It has several duties,udsuch as read the benchmark scenario file, con figure the programudbased on the scenario, initialize the launcher section, gather theudbenchmark results from local and remote Erlang node where theudlauncher runs and write them in a log file (later the log file will beudused to generate a report page for the sysadmin). Controller alsoudhas function as a timer which act as timing for user inters arrivaludto the server. Launcher generates a number of users based on theudscenario, initialize them and start the benchmark by sendingudrequests to the web server. The clients also gather the benchmarkudresult and send them to the controller.