简介：BES1Monitoring&DisplayingSystem(BESMDS)isprojectedtomonitoranddisplaytherunningstatusofDAQandSlowControlsystemsofBESthroughtheWebforworldwideaccessing.Itprovidesareal-timeremotemeansofmonitoringaswellasanapproachtostudytheenvironmentalinfluenceuponphysicaldatataking.Thesystemcollectsreal-timedataseparatelyfromBESonlinesubsystemsbynetworksocketsandstoresthedataintoadatabase.Peoplecanaccessthesystemthroughitswebsite.whichretrievesdataonrequestfromthedatabaseandcandisplayresultsindynamicallycreatedimages.Itswebaddressinhttp://besmds,ihep.ac.cn/

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简介：TheBaBardataacquisitionsystem(DAQ)transportsdatafromthedetectorfrontendeletronicstoshorttermdiskstorage.Amonitoringapplication(VMON)hasbeendevelopedtomonitortheonehundredandninetycomputersinthedataflowsystem.PerformanceinformationforeachCPUiscollectedandmulticastacrosstheexistingdatatransportnetwork.ThepacketsarecurrentlycollectedbyasingleUNIXworkstationandarchived.AROOTbasedGUIprovidescontrolanddisplaystheDAQperformanceinrealtime.ThesameGUIisreusedtorecoverarchivedVMONdata,VMONhasbeendeployedandconstantlymonitorstheBaBardataflowsystem.Ithasbeenusedfordiagnosticsandprovidesinputtomodelsprojectingfutureperformance.Theapplicationhasnomeasurableimpactondatataking,respondsinstantaneouslyonthehumantimescaletorequestsforinformationdisplay,andusesonly3%ofa300MHzSunUltra5CPU.

简介：ADistributedMonitoringSystem(NGOP)thatwillscaletotheanticipatedrequirementsforRUnIIcomputinghasbeenunderdevelopmentatFermilab.NGOP[1]providesaframeworktocreateMonitoringAgentsformonitoringtheoverallstateofcomputersandsoftwarethatarerunningonthem.SeveralMonitoringAgentsareavailablewithinNGOPthatarecapableofanalyzinglogfiles,andcheckingexistenceofsystemdaemons,CPUandmemoryutilization,etc,NGOPalsoprovidescustomizablegraphicalhierarchicalrepresentationsofthesemonitoredsystems.NGOPisabletogenerateeventswhenseriousproblemshaveoccurredaswellasraisingalarmswhenpotentialproblemshavebeendetected.NGOPallowsperformingcorrectivactionsorsendingnotifications,NGOPprovidespersistentstorageforcollectedevents,alarmsandactions.AfirstimplementationofNGOPwasrecentlydeployedatFermilab.Thisisafullyfunctionalprototypethatsatisfiesmostoftheexistingrequirements.ForthetimebeingtheNGOPprototypeismonitoring512nodes.DuringthefirstfewmonthsofrunningNGOPhasprovedtobeausefultool.Multipleproblemssuchasnoderesets,offlineCPUs,anddeadsystemdaemonshavebeendetected.NGOPprovidedsystemadministratorswithinformationrequiredforbettersystemtuningandconfiguration.Thecurrentstateofdeploymentandfuturestepstoimprovetheprototypeandtoimplementsomenewfeatureswillbepresented.

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简介：ＩｎｄｉｖｉｄｕａｌＤｏｓｅＭｏｎｉｔｏｒｉｎｇｏｆＲａｄｉａｔｉｏｎＷｏｒｋｅｒｓｉｎＩＭＰ￥ＷａｎｇＧｕｉｌｉｎｇ；ＬｉｕＹｕｙａｎａｎｄＺｈｅｎｇＨｕａｚｈｉＴｈｅｐａｐｅｒｐｒｅｓｅｎｔｓｍｏｎｉｔｏｒｉｎｇｒｅｓｕｌｔｓｏｆｉｎｄｉｖｉｄｕ...

简介：ThispaperpresentsthedesignandimplementationofFarMon-aflexibleeventmonitoringsystemforcomputingcluster,UsingseveraltechniquesincludingDCL(DynamicClassLoading)technique,modulepublish/subacribe/unsubscribeprotocolanddirectoryservice,wecreateahighefficient,highextensibleandhighportableclustermonitoringsystem.

简介：TheproblemofcontinuouslymonitoringmultipleK-nearestneighbor(K-NN)querieswithdynamicobjectandquerydatasetisvaluableformanylocation-basedapplications.Apracticalmethodistopartitionthedataspaceintogridcells,withbothobjectandquerytablebeingindexedbythisgridstructure,whilesolvingtheproblembyperiodicallyjoiningcellsofobjectswithquerieshavingtheirinfluenceregionsintersectingthecells.Intheworstcase,allcellsofobjectswillbeaccessedonce.ObjectandquerycachestrategiesareproposedtofurtherreducetheI/Ocost.Withobjectcachestrategy,queriesremainingstaticincurrentprocessingcycleseldomneedI/Ocost,theycanbereturnedquickly.ThemainI/Ocostcomesfrommovingqueries,thequerycachestrategyisusedtorestricttheirsearch-regions,whichusescurrentresultsofqueriesinthemainmemorybuffer.Thequeriescansharenotonlytheaccessingofobjectpages,butalsotheirinfluenceregions.TheoreticalanalysisoftheexpectedI/Ocostispresented,withtheI/Ocostbeingabout40%thatoftheSEA-CNNmethodintheexperimentresults.

简介：Thispaperpresentsourrecentexperimentalinvestigationonthefeasibilityofmonitoringthefrothmolding,aspecialcaseofsolidificationprocess,ofpolyurethanebyusingelectricalcapacitancetomography.Themajorchallengeistheextremelylowsoliddensityofthesolidifiedmaterialduringtheprocessduetotheverylargeexpansionratio.Suitablecalibrationmethodissoughtandadequateimagereconstructionalgorithmisappliedforsuchatask.Differentexpansionmodeshavebeenobservedduringexperimentandcorrespondingimagesreconstructed.Thisvisualizationtechniqueclearlyrevealedtheexpansionprocessbyatimeseriesofimagesofthesoliddensity.Thetestresultsprovedthecapabilityofelectricalcapacitancetomographyinmonitoringtheexpansionofpolyurethane.Futurewaysforimprovementarealsosuggested.

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简介：Inadditiontodeploymentofthecommercialmanagementproducts,anumberofpublicandselfdevelopedtoolsaresuccessfullyusedatFermilabformonitoringofthecampusnetwork.Asuiteoftoolsconsistingofseveralprogramsrunninginadistributedenvironmenttomeasurenetworkparameterssuchasaverageround-triptime.traffic,throughput,errorrate,DNSresponsesandothersfromdifferentlocationsinthenetworkisused.Thesystemmaintainsacentralarchiveofdata,makesanalysisandgraphicalrepresentationavailableviaaweb-basedinterface.ThedevelopedtoolsarebasedonintegrationwithwellknownpublicsoftwareRRD,Cricketfping,iperf.

简介：Inthispaper,wedescribetheestimationoflow-altituderefractivitystructurefromsimulationandrealground-basedGPSdelays.Theverticalstructureoftherefractiveenvironmentismodeledusingthreeparameters,i.e.,ductheight,ductthickness,andductslope.Therefractivitymodelisimplementedwithaprioriconstraintsontheductheight,thickness,andstrength,whichmightbederivedfromsoundingsornumericalweather-predictionmodels.Araypropagationmodelmapstherefractivitystructureintoareplicafield.Replicafieldsarecomparedwiththesimulationobserveddatausingasquarederrorobjectivefunction.Aglobalsearchforthethreeenvironmentalparametersisperformedusingageneticalgorithm.Theinversionisassessedbycomparingtherefractivityprofilesfromtheradiosondestothoseestimated.Thistechniquecouldprovidenear-real-timeestimationoftheductingeffect.Theresultssuggestthatground-basedGPSprovidessignificantatmosphericrefractivityinformation,despitecertainfundamentallimitationsofground-basedmeasurements.Radiosondesaretypicallylaunchedjustafewtimesdaily.Consequently,estimatesoftemporallyandspatiallyvaryingrefractivitythatassimilateGPSdelayscouldsubstantiallyimproveover-estimatescausedbyusingradiosondedataalone.

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简介：UnderstandinghowtheInternetisusedbyHEPiscriticaltooptimizingtheperformanceoftheinter-labcomputingenvironment.Typicallyuserequirementshavebeendefinedbydiscussionsbetweencollaborators.However,lateranalysisoftheactualtraffichasshownthisisoftenmisunderstoodandactualuseissignificantlydifferenttothatpredicted.Passivemonitoringoftherealtrafficprovidesinsightintothetruecommunicationsrequirementsandtheperformanceofalargenumberofalargenumberofinter-communicatingnodes.ItmaybeusefulinidentifyingperformanceproblemsthatareduetofactorsotherthanInternetcongestionespeciallywhencomparedtoothermethodssuchasactivemonitoringwheretrafficisgeneratedspecificallytomeasureitsperformance.Controlledactivemonitoringbetweendedicatedserversoftengivesanindicationofwhatcanbeachievedonanetwork,Passivemonitoringoftherealtrafficgivesapictureofthetrueperformance.ThispaperwilldiscussthemethodandresultsofcollectingandanalyzingflowsofdataobtainedfromtheSLACInternetborder,TheuniquenatureofHEPtrafficandtheneedsoftheHEPcommunitywillbehighlighted.Theinsightsthishasbroughttounderstandingthenetworkwillbereviewedandthebenefitiscanbringtoengineeringnetworkswillbediscussed.

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简介：TheJointControlsProject(JCOP)isacollaborationbetweenCERNandthefourLHCexperimentstofindandimplementcommonsolutionsfortheircontrolandmonitoringsystems.AspartofthisprojectandArchitectureWorkingGroupwassetupinordertostudytherequirementsanddeviseanarchitecturalmodelthatwouldsuitthefourexperiments.Manyissueswerestudiedbythisworkinggroup:Alarmhandling,AccessControl,HierarchicalControl,etc.Thispaperwillreportonthespecificissueofhierarchicalcontrolandinparticularpartitioning,automationanderrorrecovery.

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