浅谈云计算英文版.docx
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浅谈云计算英文版
AReviewOfCloudComputing
Teammembers:
许慧平
赵曼
刘强
罗宾
2012年3月22日
AReviewOfCloudComputing
Abstract:
cloudcomputingisakindofsupercalculationmodebasedonInternet.Forthecategoryofcloudcomputing,thispaperconcludestheconceptofcloudcomputing,emergingbackground,thepresentmainapplications,thefuturedevelopmentoftheprospectandthepresent'sproblems.
Keywords:
cloudcomputing;dataprocessing;distributedcomputing;Internet
1.ProducingofCloudComputing
1.1whatiscloudcomputing
TheproducingofCloudcomputinghasabigbackgroundinevitability.First,thedevelopmentofCommunicationandInternetisfasterthanthedevelopmentofComputer.ThatsituationoffersasoilforgrowingofCloudcomputer.Second,Softwareengineeringchangedthewayoffaceingtheservicesuchasfacingmachine,languageandmiddlewareintothewayoffacingserviceandneed.ThatmadeSAAS(Software as a Service)tocometrue.Third,theusersbeginningtopaycloseattentiontocorebusinessmoreandmore.Theydon'tneedtobecomeareal“Amateurengineers”.ItiswhattheCloudcomputerbroughttheimportantchangingonthewayofusingITfacilityforusers.Cloud computing is a resource delivery and usage model, it means get resource (Hardware, software)via network. The network of providing resource is called ‘Cloud’. The hardware resource in the ‘Cloud’ seems scalable infinitely and can be used whenever.
1.2Theprincipleofcloudcomputing
1.2.1threemethodofcalculation:
Parallelprocessing
Parallelprocessingcomputersystemcanperformacalculationoftwoormoreprocessors.Processorscanworksimultaneouslyondifferentaspectsofthesameprogram.Fortheuseofparallelprocessing,itcanbesaidofaprogramexecutedonnprocessorsspeedmaybeperformedonasingleprocessorspeedntimes.
Distributedprocessing
Distributedprocessingsystemwillbeindifferentlocationsormultiplecomputerswithdifferentfunctionsordifferentdatacommunicationsnetworklinkingunderthecontrolofthecontrolsystemofunifiedmanagementandcoordinationtocompletethecomputersystemforinformationprocessingtasks.
Gridcomputing
GridcomputingisaccompaniedbytheInternetandtherapiddevelopmentofthenewcomputingmodel,specificallyforcomplexscientificcalculations.ThiscomputingmodelistheuseoftheInternetdispersedgeographicallycomputerorganizationintoa"virtualsupercomputer",eachofwhichinvolvedinthecalculationcomputerisa"node",theentirecalculationismadeupofthousands"nodes"consistingofagrid,sothismethodofcalculationiscalledgridcomputing.
Whatcloudcomputingis?
Cloudcomputingisanemergingbusinesscomputingmodel.
Specifically,CloudComputingisakindofdistributedprocessing,parallelprocessingandgridcomputingdevelopment,orcommercialimplementationofthesecomputerscienceconceptsThetransmissioncapacityofthehigh-speedInternet,dataprocessingprocessfromapersonalcomputerorservertoaclusterofcomputersontheInternet.,Thisisarevolutionarymove,theanalogy,whichislikeashiftfromtheoldsingle-generatormodetothemodeofthepowerplantcentralizedpowersupply.Itmeansthatcomputingpowerasacommoditycirculation,likegas,waterandelectricity,like,accesstoconvenient,low-cost.Forexampleit!
Ourcomputingmodelismostlocallyinstalledsoftware,andthenexchangedatawiththeserverthroughlocalprocessing,cloudcomputing,wedonotneedlocalprocessing,justusethebrowser.
Afterunderstandingofwhatcloudcomputing,letusunderstandsomeoftheothercloudcomputing.
CloudComputingArchitecture
Mostofthecloudcomputinginfrastructureistransmittedthroughthedatacenterareliableserviceandthedifferentlevelsofvirtualizationtechnologyontheserver.Peoplecanusetheseservicesinanynetworkinfrastructure.
Cloudserver
Cloudserverisasetofclusteredserversonvirtualquasi-independentpartoftheserver,cluster,eachserverhasamirrorimageofthecloudserver.
AlsocloudcomputingissimilarwithVPSservervirtualizationtechnology,cloudserverisaVPSisavirtualsoftware,theVZorVMonasingleservervirtualquasi-independentpartoftheserver,eachpartcanbedonetoseparatetheoperatingsystem,managementmethodsthesameserver.
1.2.2Thecoretechnologyofcloudcomputing
1)Programmingmodel.Forlarge-scaledatasets(greaterthan1TB)parallelcomputing.Strictprogrammingmodelthatmakescloudcomputingprogrammingenvironmentisverysimple.
2)Hugeamountsofdatadistributedstoragetechnology.Cloudcomputingsystemconsistsofalargenumberofservers,aswellasalargenumberofusers,cloudcomputingsystemusesthestoreddataofdistributedstorage,redundantstoragetoensuredatareliability.
3)Hugeamountsofdatamanagementtechnology.Cloudcomputingonthedistributionofvastamountsofdataprocessing,analysis,datamanagementtechnologynecessarytoefficientlymanagelargeamountsofdata.
Virtualizationtechnology.Virtualizationtechnologyenablessoftwareapplicationsandtheunderlyinghardwareisolation,whichincludesasingleresourceisdividedintomultiplevirtualresourcessplittingmode,includingtheintegrationofmultipleresourcesintoavirtualresourceaggregationmode.Abstracttheserverphysicalresourcesintologicalresource,allowsasingleserverintoseveralvirtualserversorevenhundredsofisolated,wearenolongerlimitedbyphysicalboundaries,buttheCPU,memory,diskI/Ohardwareintoadynamicmanagementoftheresourcepool,toimproveresourceutilization,simplifysystemsmanagement,serverconsolidation,ITbusinesschangemoreresilient.
2.1TheapplicationareaofCloudComputing
Aswellknown,anewtechnologyisinventedistomeettheneedsoftheapplication.Andthetechnologywillalsocontinuouslyimproveanddevelopwiththeneedsoftheapplication.SoistheCloudComputing.Cloudcomputingareabletobeappliedbecauseofitsmassofdataprocessingpowerandefficientcomputationalability.ButOwingtothecloudcomputingstartedlate,nowalotofapplicationarestillinstudyingstage.Thus,Ionlyplantointroducesomeapplicationswhichhaveusedasfollowing.
2.1.1Scientificresearch
Therearethreemajorapplicationsinscientificresearch,namelyearthquakemonitoring,marineinformationmonitoringandastronomycalculationinformationprocessing.Theseapplicationsneedtocombinewithsensortechnology.Suchastemperaturetransmitter,depthsensor.Thesensorsareusedtocollectsignalandconverttovoltagesignal,thensendthemtoCloudcomputingserversthroughInternettoprocessandstore.Wecangetfromtheserverswhenneededatanytime.Becausetheinformationisoflargeamount,itneedhighspeedpowerfulcomputertoprocess,nowthe"Cloud"isusedon.ThisisthemajorusingofCloud.
2.1.2NetworkSecurity
Networksecurityisnowaverypopulartopic.Especiallythenetworkvirusisgrowingrapidly.Soviruslibrarystorageisamajorconcern.Cloudmassdatastoragecapacitycanmeettheneed.Forexample,Rising"CloudSecurity"plan,itsworkingprincipleisasfollows.Theclientcanbeautomaticallytoconnecttotheserverandscanninguser'sPC,thensendthesuspiciousobjectstoserverstomatchandreturntheresultinseconds.Theserverswillwarntheclienttodealwiththeobjectiftheobjectisvirus.AnotherusingistheSpamshieldingwhichisalsousedthecloudmassdatastoragecapacity.
2.1.3Medicine
DNAinformationstorageisthebestreflecttionofthemassdatastorageofcloud.1.3billionpeopleintheworldwithuniqueDNAinformationneedtostoreandanalysis.Wemusthaveenoughroomtostoretheinformationandaccesstoitatanytime.The"Cloud"isusedtoachieveit.Andit'salsoappliedtocasesstoragewhichcanhelptoachieveglobalmedicalintegration.Besides,medicalimageprocessingisalsoaimportantapplication.
2.1.4Internet
Nowthemostimportantapplicationsofnetworkisretrievalservice.Butthemassofinformationstoredintheservers.Inordertogetwhattheuserwanted,theInternetsuppliersmustsupplyfastandefficientalgorithmtoscreeningbestmatchedinformation.Thusthecloud'sefficientcomputingpowerisusedtodoit.Forexample,GoogleCloudcomputingplatformisputforwardjusttoimplementefficientretrievalfunctionatfirst.AndE-mailserverandonlinereal-timetranslationarealsousedonCloud.
2.1.5Theradioandtelevisionindustryapplication
Thisapplicationonlyonideasstagenowandithasnotcomeintouse.TheideaisbigcablecompanyscanestablishaCloudcomputingplatformtogethertomeettheirneedtomakehighdefinitionandhighqualityaudio.Atthesametime,alittercablecompanysalsowanttomakesomehighqualityaudio,buttheycannotaffordtothehighconfiguredequipments.Sothebigcablecompanyscansparesomeidleresourcestothelitteroneswhichneeded.Inthisway,notonlycantheymeettheirownneed,butalsocantheymakefullyuseoftheirresources.
Otherwise,nowsomesensitiveinformationlikeradioandvideoneedlargemountofspacetostore,sowecanstorethemtotheCloudwhichhasmassdatastoragecapacity.
2.2ThefourfamousCloudserviceplatforms
Actually,theCloudComputingresearchbyacademicismuchearlierthantheproposalofitsconcept.We,theChineseresearchers,havehadthetransparentComputingideabeforetheemergenceofthetermwhichiscalled"CloudComputating".Transparentcloudcomputingembodiesthecharacteristicsofcloudcomputing,thatisdynamicresourcepools,virtualization,transparenttotheuseretc.
Atpresent,industrytoprovidecloudcomputingthatnotmanycompanies.AndmoreinfluentialplatformshaveGoogleCloudc