steps towards the automatic production of performance models of web applications q

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1、ComputerNetworks41(2003)29–39www.elsevier.com/locate/comnetStepstowardstheautomaticproductionqofperformancemodelsofwebapplicationsA.DÕAmbrogio,G.Iazeolla*DepartmentofComputerScience,FacultyofEngineering,UniversityofRomaatTorVergata,1ViadelPolitecnico,I-00133Roma,ItalyReceived2

2、4July2001;receivedinrevisedform11March2002;accepted6June2002ResponsibleEditor:U.KriegerAbstractTheautomaticproductionofperformancemodelsofsoftwareproductscanencouragesoftwaredesignerstoincludeperformancevalidationintheirbestpractices.Theincorporationofmethodsforautomaticproduc

3、tioncanalsobeofinterestofCASEtoolvendorstoimprovethecapabilitiesoftheircommercialsoftwaredevelopmentenvironments.Thispaperdealswithamethodthatintroducesasystematicapproachtowardstheautomaticproductionofper-formancemodelsofwebapplications(i.e.softwareapplicationsrunonwebplatfor

4、ms).Themethodtakesininputtwosetsofdata,thedescriptionoftheplatformarchitecture(ageneralviewofthesystemplatformandadetailedviewofthepacketflowintheplatformitself)andasetofdatathatdescribestheworkloadimposedontheplatformbytheapplication.Theproducedmodelisanextendedqueueingnetwork

5、readytobeusedbyconventionalevaluationtoolstoderivepredictionsontheperformanceofthesoftwareapplications.Anexampleisgivenofthemethodapplication,inwhichpredictionsoftheperformanceoftheapplicationareobtainedversusvariouscombinationsoftheprocessingpowersoftheinteractinghosts.Ó2002E

6、lsevierScienceB.V.Allrightsreserved.Keywords:Webperformance;Webconfiguration;Performanceprediction;Modelproduction1.IntroductionTheperformanceofwebapplications,orsoft-qwareapplicationsforthewebplatform,isoneWorkpartiallysupportedbyfundsfromtheMURSTprojectonSoftwareArchitectures

7、andLanguagestoCoordi-ofthemainattributesoftheQoSofwebplat-nateDistributedMobileComponents,fromtheUniversityofforms.ExamplewebapplicationsareinthefieldsRomaTorVergataresearchonthePerformanceValidationofofdistributedinformationretrieval,distributedAdvancedSystemsandfromtheUnivers

8、ityofRomeTorVer-interactivesimulation,mobiletelecommunication