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1、DiscouragingFreeRidinginaPeer-to-PeerCPU-SharingGridNazarenoAndradeFranciscoBrasileiroWalfredoCirneDepartamentodeSistemaseComputac¸ao˜UniversidadeFederaldeCampinaGrandeCampinaGrande,Brazilfnazareno,fubica,walfredog@dsc.ufcg.edu.brMirandaMowbrayHPLabsBristolmjfm@hplb.hpl.hp.c
2、omAbstract(i.e.,assemblingagrid)isnotasimpletask.TherearenowidelyadoptedsolutionsthatmakethenegotiationbetweenGridcomputinghasexcitedmanywiththepromiseofresourceconsumersandprovidersautomatic.accesstohugeamountsofresourcesdistributedacrosstheThiscurrentlackofwidelyadoptedsol
3、utionsisprobablyglobe.However,therearenolargelyadoptedsolutionsforduetothecomplexityofimplementingmostproposedso-automaticallyassemblinggrids,andthislimitsthescaleoflutions,whichrelyoncurrency-basedeconomiesforsolv-today’sgrids.Somearguethatthisisduetotheoverwhelm-ingthegene
4、ralgrid-assemblyproblem[5,6,13,1].Inthisingcomplexityoftheproposedeconomy-basedsolutions.scenarioaconsumercannegotiateanarbitrarilycomplexPeer-to-peergridshaveemergedasalesscomplexalterna-provisionofresourcesandpayforitinsomecurrency.Totive.WearecurrentlydeployingOurGrid,one
5、suchpeer-deployasolutionforthisscenario,itisalsonecessarytoto-peergrid.OurGridisaCPU-sharinggridthattargetsdeployaninfrastructureforsecuree-cash,e-banking,andBag-of-Tasksapplications(i.e.parallelapplicationswhoseserviceauditing.Wearguethatthisneediscurrentlythetasksareindepe
6、ndent).Inordertoeasesystemdeployment,greatestobstacletobuildingaGridEconomy.OurGridisbasedonaverylightweightautonomousrepu-Peer-to-peergrids[3,4,7,18]havebeenproposedastationscheme.alternativestothecurrency-basedsolutions.TheydonotFreeridingisanimportantissueforanypeer-to-pe
7、ersolvethegeneralgrid-assemblyproblem.However,theysystem.TheaimofthispaperistoshowthatOurGrid’srep-cantakeadvantageoftheeaseofimplementationofpeer-to-utationsystemsuccessfullydiscouragesfreeriding,makingpeersystemstogetresource-sharingnetworksinproductionitineachpeer’sownint
8、eresttocollaboratewiththepeer-today.to-peercommunity.Weshowthisintwosteps.F
