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1、XtremWeb&Condor:sharingresourcesbetweenInternetconnectedCondorpools.O.Lodygensky,G.Fedak,F.Cappello,V.Neri,M.Livny,D.ThainLAL,LaboratoiredelAccelerateurLineaire,FranceLRI,LaboratoiredeRechercheenInformatique,FranceDepartmentofComputerScience,UniversityofWisconsin-Madison,Wisconsin,USA
2、Abstractcluster).TheGridsolutionmustfulfillatleasttwoenablingfeatures:securityandfaulttolerance.Gridcomputingpresentstwomajorchallengesforde-Theseapplicationsarealsointerestingfromthecom-ployinglargescaleapplicationsacrosswideareanetworksputerscientistpointofviewbecausetheycanfitthetwog
3、atheringvolunteersPCandclusters/parallelcomputersasknownapproachesofLargeScaleDistributedComputing:computationalresources:securityandfaulttolerance.peertopeercomputing(P2P)andGridcomputing[4].ThispaperpresentsalightweightGridsolutionforthedeploymentofmulti-parametersapplicationsonaset
4、ofclustersprotectedbyfirewalls.Thesystemusesahierar-GridmaingoalistoachieveflexibleandsecurelargechicaldesignbasedonCondorformanagingeachclusterscalecomputingwithhighperformancesbetweensocalledlocallyandXtremWebforenablingresourcesharingamongvirtualorganizations,entitiesthatacceptaresou
5、rceex-theclusters.changepolicy,basedonhighcontrolaboutwhosharesWediscussthesecurityandfaulttolerancemecha-what,whatissharedandwhatarethesharingconditions.nismsusedforthisdesignanddemonstratetheuseful-Themaintoolkit,Globus[14],isalreadyusedbyseveralnessoftheapproachmeasuringtheperforma
6、ncesofaprojects.OneofthemaincontributionsofGlobusisitsmulti-parametersbio-chemistryapplicationdeployedonstrongsecuritymechanisms(GSI)whichisthebasisoftwosites:UniversityofWisconsin/MadisonandParisSouthmanycurrentGriddeployments.However,GlobuswhichUniversity.hasbeendesignedtoallowmanyu
7、serstoshareresourcesThisexperimentshowsthatwecanefficientlyandsafelyownedbyinstitutionsmaynotbeappropriateinthespecificharnessthecomputationalpowerofabout200PCdis-casesofmulti-parametersapplicationsranfromacentral-tributedontwogeographicsites.izeddispatcher.AnotherconcernaboutGlobusisit
8、slack
