StorageVirtualization存储虚拟化

StorageVirtualization,Module2.6,StorageVirtualization,-2,ModuleObjectives,Uponcompletionofthismodule,youwillbeableto:IdentifydifferentvirtualizationtechnologiesDescribeblock-levelvirtualizationtechnologiesDescribefile-levelvirtualizationtechnologiesDiscussvirtualprovisioning,StorageVirtualization,-3,LessonVirtualizationOverview,Uponcompletionofthislesson,youwillbeableto:Identifyanddiscussvirtualizationtechnologies,StorageVirtualization,-4,WhatisVirtualization,VirtualizationisatechniqueofabstractingphysicalresourcesintologicalviewIncreasesutilizationandcapabilityofITresourceSimplifiesresourcemanagementbypoolingandsharingresourcesSignificantlyreducedowntimePlannedandunplannedImprovedperformanceofITresources,StorageVirtualization,-5,VirtualizationComesinManyForms,5,Eachapplicationseesitsownlogicalmemory,independentofphysicalmemory,VirtualMemory,Eachapplicationseesitsownlogicalnetwork,independentofphysicalnetwork,VirtualNetworks,Eachapplicationseesitsownlogicalserver,independentofphysicalservers,VirtualServers,Eachapplicationseesitsownlogicalstorage,independentofphysicalstorage,VirtualStorage,StorageVirtualization,-6,6,MemoryVirtualization,BenefitsofVirtualMemoryRemovephysical-memorylimitsRunmultipleapplicationsatonce,Physicalmemory,Swapspace,App,App,App,StorageVirtualization,-7,7,Eachapplicationseesitsownlogicalnetwork,independentofphysicalnetwork,VirtualNetworks,NetworkVirtualization,BenefitsofVirtualNetworksCommonnetworklinkswithaccess-controlpropertiesofseparatelinksManagelogicalnetworksinsteadofphysicalnetworksVirtualSANsprovidesimilarbenefitsforstorage-areanetworks,VLANA,VLANB,VLANC,VLANtrunk,Switch,Switch,StorageVirtualization,-8,ServerVirtualization,StorageVirtualization,-9,StorageVirtualization,ProcessofpresentingalogicalviewofphysicalstorageresourcestohostsLogicalstorageappearsandbehavesasphysicalstoragedirectlyconnectedtohostExamplesofstoragevirtualizationare:Host-basedvolumemanagementLUNcreationTapevirtualizationBenefitsofstoragevirtualization:IncreasedstorageutilizationAddingordeletingstoragewithoutaffectingapplicationsavailabilityNon-disruptivedatamigration,Virtualization,Layer,HeterogeneousPhysicalStorage,Servers,StorageVirtualization,-10,LessonSummary,Keytopicscoveredinthislesson:VariousformsofvirtualizationMemory,network,serverandstoragevirtualization,StorageVirtualization,-11,LessonStorageVirtualizationImplementation,Uponcompletionofthislesson,youwillbeableto:DiscussSNIAvirtualizationtaxonomyDescribeBlock-LevelVirtualizationtechnologiesandimplementationDescribeFileLevelVirtualizationtechnologiesandimplementation,StorageVirtualization,-12,SNIAStorageVirtualizationTaxonomy,StorageVirtualization,-13,StorageVirtualizationRequiresaMulti-LevelApproach,Server,Storage,Network,Storage,Pathmanagement,Volumemanagement,Replication,Volumemanagement-LUNs,Accesscontrol,Replication,RAID,Pathredirection,Loadbalancing-ISLtrucking,Accesscontrol-Zoning,StorageVirtualization,-14,StorageVirtualizationConfiguration,(a)Inout-of-bandimplementation,thevirtualizedenvironmentconfigurationisstoredexternaltothedatapath(b)Thein-bandimplementationplacesthevirtualizationfunctioninthedatapath,StorageVirtualization,-15,StorageVirtualizationChallenges,ScalabilityEnsurestoragedevicesperformappropriaterequirementsFunctionalityVirtualizedenvironmentmustprovidesameorbetterfunctionalityMustcontinuetoleverageexistingfunctionalityonarraysManageabilityVirtualizationdevicebreaksend-to-endviewofstorageinfrastructureMustintegrateexistingmanagementtoolsSupportInteroperabilityinmultivendorenvironment,StorageVirtualization,-16,Block-LevelStorageVirtualization,TiestogethermultipleindependentstoragearraysPresentedtohostasasinglestoragedeviceMappingusedtoredirectI/OonthisdevicetounderlyingphysicalarraysDeployedinaSANenvironmentNon-disruptivedatamobilityanddatamigrationEnablesignificantcostandresourceoptimization,StorageVirtualization,-17,File-LevelVirtualization,StorageVirtualization,-18,Lesson:Summary,Keypointscoveredinthislesson:StoragevirtualizationchallengesStoragevirtualizationconfigurationTypesofstoragevirtualization,StorageVirtualization,-19,ConceptinPracticeEMCInvista,InsidetheIntelligentSwitch,MappedI/Ostreams,Host,Storage,EMCInvista,InputI/Ostream,IntelligentSwitches:FibreChannelswitcheswithcustomhardwareforenhancedprocessingCapableofperformingoperationsondatastreamsatlinespeedControlledbyinstructionsfromexternalmanagementsoftware(viaAPIs),StorageVirtualization,-20,InvistaVideo,StorageVirtualization,-21,MovingFilesOnline:AFileVirtualizationExample,EventLogFileVirtualizationinsertedintoI/OClientredirectionGlobalNamespaceupdated,FileVirtualizationAppliance,Migrationcompletewithoutdowntime,StorageVirtualization,-22,RainfinityVideo,Clickheretoplaythevideo,StorageVirtualization,-23,Lesson:VirtualProvisioning,Uponcompletionofthislesson,youwillbeableto:ExplainVirtualProvisioningDescribeandexplainThinvs.TraditionalLUNsExplainthebenefitsofVirtualProvisioningExplainhowtocreate,monitor,andmanageThinLUNs,StorageVirtualization,-24,WhatisVirtualProvisioning,Capacity-on-demandfromasharedstoragepoolLogicalunitspresentedtohostshavemorecapacitythanphysicallyallocatedPhysicalstorageisallocatedonlywhenthehostrequiresitProvisioningdecisionsnotboundbycurrentlyavailablestorageAboveandbeyond“ThinProvisioning”Includesmanagementtoolsthatmakeiteasiertoconfigure,use,monitorandmanageThinPoolsandThinLUNs,SharedStoragePool,Storageperceivedbytheapplicationislargerthanphysicallyallocatedstorage,StorageVirtualization,-25,TraditionalProvisioning,VirtualProvisioning,TraditionalProvisioningvs.VirtualProvisioning,1650GBOr1.65TBAvailableCapacity,350GBActualData,StorageSystem,LUN1,LUN2,LUN3,StorageVirtualization,-26,VirtualProvisioningBenefits,ReduceadministrativecostsSimplifiesstorageprovisioningOver-provisioningcaneliminatechallengesofexpansionReducestimerequiredtorepeatedlyaddstoragecapacityReducestoragecostsIncreasedspaceefficiencyforprimarystorageandreplicas“Storageondemand”fromsharedstoragepoolDeployassetsasneededReducelevelsofunusedphysicalstorageAvoidpre-allocatingphysicalstoragetoapplicationsReduceoperatingcostsFewerdisksconsumelesspower,coolingandfloorspaceReducedowntimeLessdisruptivetoapplications,StorageVirtualization,-27,VirtualProvisioningThinPoolExpansion,Addingdrivestothepoolnon-disruptivelyincreasesavailablesharedcapacityforallThinLUNsinpoolDrivescanbeaddedtoaThinPoolwhilepoolisbeingusedinproductionAllocatedcapacityisreclaimedbythepoolwhenThinLUNsaredeletedDonotdefrag,StorageVirtualization,-28,Traditionalvs.ThinLUNs,UseRAIDGroupsandtraditionalLUNsWhenmicrosecondsofperformancemattersForthebestandmostpredictableperformanceForprecisedataplacementYouarenotasconcernedaboutspaceefficiency,UseVirtualProvisioningwithThinPoolsandThinLUNsWhenthebestspaceefficiencyisneededForminimalhostimpactWhenenergyandcapitalsavingsareparamountForapplicationswherespaceconsumptionisdifficulttoforecast,StorageVirtualization,-29,LessonSummary,Keypointscoveredinthismodule:VirtualProvisioningThinvs.TraditionalLUNsBenefitsofVirtualProvisioning,StorageVirtualization,-30,ModuleSummary,Keypointscoveredinthismodule:VirtualizationtechnologiesandformsSNIAstoragevirtualizationtaxonomyStoragevirtualizationconfigurationStoragevirtualizationchallengesTypesofstoragevirtualizationVirtualprovisioningoverview,StorageVirtualization,-31,CheckYourKnowledge,Whatarethefourformsofvirtualization?Differencebetweenin-bandandout-of-bandimplementation.Whatarethechallengesofstoragevirtualization?Whatisvirtualprovisioning?,CloudStorageInfrastructure,StorageVirtualization,-33,ChallengeswithTraditionalStorageApproach,Notdesignedtoscaleinthemulti-petabyteAdditionofnewarraysforcapacityenhancementCostandmanagementoverheadIncreasedtimetomarketCanaddresstransactionalanddistributedcomputingButfellshortforInternetErarequirementsDesignedforOperationWithinITsWalls,StorageVirtualization,-34,CloudStorageInfrastructure:TheBigPicture,TodealwithInternetEradatagrowthAmassivelyscalableinfrastructureisrequiredOnethatoffersglobaldatadistribution,self-healing,self-management,andmulti-tenancyfeaturesACloudapproachtostorageAcosteffectiveapproachtohandlinginterneteradatagrowthFocusingonfivekeyinfrastructurerequirementsInfiniteScaleNoBoundariesOperationallyEfficientSelf-ManagementSelf-Healing,StorageVirtualization,-35,UseofCloudComputingResources,“Cloudcomputing”takesholdas69%ofallinternetusershaveeitherstoreddataonlineorusedaweb-basedsoftwareapplication,Source:“UseofCloudComputingApplicationsandServices”,PewInternet&AmericanLifeProject,9/12/2008,StorageVirtualization,-36,DefiningCloudComputing,“CloudComputingisanemergingITdevelopment,deploymentanddeliverymodel,enablingreal-timedeliveryofproducts,servicesandsolutionsovertheInternet(i.e.enablingcloudservices)”ServicesincludeSoftware-as-a-Service(SaaS)Storage-as-a-Service(Staas)Computing-as-a-Service(CaaS)Hardware-as-a-Service,Data-as-a-serviceExamples:A