Storage Virtualization存储虚拟化

1、 2009 EMC Corporation. All rights reserved.Storage Virtualization 2009 EMC Corporation. All rights reserved.精选ppt - 2Module ObjectivesUpon completion of this module, you will be able to: Identify different virtualization technologies Describe block-level virtualization technologies Describe file-lev

2、el virtualization technologies Discuss virtual provisioning 2009 EMC Corporation. All rights reserved.精选ppt - 3Lesson Virtualization OverviewUpon completion of this lesson, you will be able to: Identify and discuss virtualization technologies 2009 EMC Corporation. All rights reserved.精选ppt - 4What i

3、s Virtualization Virtualization is a technique of abstracting physical resources in to logical view Increases utilization and capability of IT resource Simplifies resource management by pooling and sharing resources Significantly reduce downtime Planned and unplanned Improved performance of IT resou

4、rces 2009 EMC Corporation. All rights reserved.精选ppt - 5Virtualization Comes in Many Forms5Each application sees its own logical memory, independent of physical memoryVirtual MemoryEach application sees its own logical network, independent of physical networkVirtual NetworksEach application sees its

5、 own logical server, independent of physical serversVirtual ServersEach application sees its own logical storage, independent of physical storageVirtual Storage 2009 EMC Corporation. All rights reserved.精选ppt - 66Each application sees its own logical memory, independent of physical memoryVirtual Mem

6、oryMemory VirtualizationBenefits of Virtual MemoryRemove physical-memory limitsRun multiple applications at oncePhysical memorySwap spaceAppAppApp 2009 EMC Corporation. All rights reserved.精选ppt - 77Each application sees its own logical network, independent of physical networkVirtual NetworksNetwork

7、 VirtualizationBenefits of Virtual NetworksCommon network links with access-control properties of separate linksManage logical networks instead of physical networksVirtual SANs provide similar benefits for storage-area networksVLAN AVLAN BVLAN CVLAN trunkSwitchSwitch 2009 EMC Corporation. All rights

8、 reserved.精选ppt - 8Server VirtualizationBefore Server Virtualization:Operating systemApplication Single operating system image per machine Software and hardware tightly coupled Running multiple applications on same machine often creates conflict Underutilized resourcesAfter Server Virtualization: Vi

9、rtual Machines (VMs) break dependencies between operating system and hardware Manage operating system and application as single unit by encapsulating them into VMs Strong fault and security isolation Hardware-independent Virtualization layerOperating systemApp App AppOperating systemApp App App 2009

10、 EMC Corporation. All rights reserved.精选ppt - 9Storage Virtualization Process of presenting a logical view of physical storage resources to hosts Logical storage appears and behaves as physical storage directly connected to host Examples of storage virtualization are: Host-based volume management LU

11、N creation Tape virtualization Benefits of storage virtualization: Increased storage utilization Adding or deleting storage without affecting applications availability Non-disruptive data migrationVirtualization LayerHeterogeneous Physical StorageServers 2009 EMC Corporation. All rights reserved.精选p

12、pt - 10Lesson SummaryKey topics covered in this lesson: Various forms of virtualization Memory, network, server and storage virtualization 2009 EMC Corporation. All rights reserved.精选ppt - 11Lesson Storage Virtualization ImplementationUpon completion of this lesson, you will be able to: Discuss SNIA

13、 virtualization taxonomy Describe Block-Level Virtualization technologies and implementation Describe File Level Virtualization technologies and implementation 2009 EMC Corporation. All rights reserved.精选ppt - 12SNIA Storage Virtualization TaxonomyStorageVirtualizationBlockVirtualizationDiskVirtuali

14、zationFile System,File/recordVirtualizationOther DeviceVirtualizationTape, Tape Drive,Tape LibraryVirtualizationNetworkBased Virtualization Storage Device/StorageSubsystem Virtualization Host Based Virtualization In-band Virtualization Out-of-band Virtualization What is createdWhere it is doneHow it

15、 is implemented 2009 EMC Corporation. All rights reserved.精选ppt - 13Storage Virtualization Requires a Multi-Level ApproachServerStorageNetworkStoragePath managementVolume managementReplicationVolume management - LUNsAccess controlReplicationRAIDPath redirectionLoad balancing - ISL truckingAccess con

16、trol - Zoning 2009 EMC Corporation. All rights reserved.精选ppt - 14Storage Virtualization Configuration(a) In out-of-band implementation, the virtualized environment configuration is stored external to the data path(b) The in-band implementation places the virtualization function in the data pathServ

17、ersStorageArraysVirtualizationApplianceOut-of-Band(a) StorageNetworkServersStorageArraysIn-Band(b) Storage NetworkVirtualizationAppliance 2009 EMC Corporation. All rights reserved.精选ppt - 15Storage Virtualization Challenges Scalability Ensure storage devices perform appropriate requirements Function

18、ality Virtualized environment must provide same or better functionality Must continue to leverage existing functionality on arrays Manageability Virtualization device breaks end-to-end view of storage infrastructure Must integrate existing management tools Support Interoperability in multivendor env

19、ironment 2009 EMC Corporation. All rights reserved.精选ppt - 16Block-Level Storage Virtualization Ties together multiple independent storage arrays Presented to host as a single storage device Mapping used to redirect I/O on this device to underlying physical arrays Deployed in a SAN environment Non-d

20、isruptive data mobility and data migration Enable significant cost and resource optimizationServersHeterogeneous Storage ArraysVirtualization Applied at SAN Level 2009 EMC Corporation. All rights reserved.精选ppt - 17File-Level Virtualization Every NAS device is an independent entity, physically and l

21、ogically Underutilized storage resources Downtime caused by data migrationsNAS Devices/PlatformsBefore File-Level VirtualizationIP NetworkStorageArrayFileServerFileServerClientsClients Break dependencies between end-user access and data location Storage utilization is optimized Nondisruptive migrati

22、onsNAS Devices/PlatformsAfter File-Level VirtualizationIP NetworkClientsClientsStorageArrayFileServerFileServerVirtualization Appliance 2009 EMC Corporation. All rights reserved.精选ppt - 18Lesson: Summary Key points covered in this lesson: Storage virtualization challenges Storage virtualization conf

23、iguration Types of storage virtualization 2009 EMC Corporation. All rights reserved.精选ppt - 19Concept in Practice EMC InvistaInside the Intelligent Switch Mappingoperation Mapped I/O streams HostStorageEMC InvistaInput I/O streamIntelligent Switches: Fibre Channel switches with custom hardware for e

24、nhanced processing Capable of performing operations on data streams at line speed Controlled by instructions from external management software (via APIs) 2009 EMC Corporation. All rights reserved.精选ppt - 20Invista Video 2009 EMC Corporation. All rights reserved.精选ppt - 21AutomountNIS LDAPDFSADMoving

25、 Files Online: A File Virtualization ExampleNFS4 RootNIS LDAPGlobal NamespaceManagerEvent Log File Virtualization inserted into I/O Client redirection Global Namespace updated File Virtualization ApplianceDFSADAutomountNIS LDAPGlobal NamespaceManagerNFS4 rootNIS LDAPFile-datamigrationFile-datamigrat

26、ionMigration complete without down time 2009 EMC Corporation. All rights reserved.精选ppt - 22Rainfinity VideoClick here to play the video 2009 EMC Corporation. All rights reserved.精选ppt - 23Lesson: Virtual ProvisioningUpon completion of this lesson, you will be able to: Explain Virtual Provisioning D

27、escribe and explain Thin vs. Traditional LUNs Explain the benefits of Virtual Provisioning Explain how to create, monitor, and manage Thin LUNs 2009 EMC Corporation. All rights reserved.精选ppt - 24What is Virtual Provisioning Capacity-on-demand from a shared storage poolLogical units presented to hos

28、ts have more capacity than physically allocated Physical storage is allocated only when the host requires itProvisioning decisions not bound by currently available storageAbove and beyond “Thin Provisioning”Includes management tools that make it easier to configure, use, monitor and manage Thin Pool

29、s and Thin LUNsAllocatedAllocatedAllocatedHost Reported CapacityShared Storage PoolStorage perceived by the application is larger than physically allocated storage 2009 EMC Corporation. All rights reserved.精选ppt - 25Traditional Provisioning Virtual ProvisioningTraditional Provisioning vs. Virtual Pr

30、ovisioning1650 GB Or1.65 TB Available Capacity350 GB Actual DataStorage SystemLUN 1LUN 2LUN 3 2009 EMC Corporation. All rights reserved.精选ppt - 26Virtual Provisioning Benefits Reduce administrative costs Simplifies storage provisioning Over-provisioning can eliminate challenges of expansion Reduces

31、time required to repeatedly add storage capacity Reduce storage costs Increased space efficiency for primary storage and replicas “Storage on demand” from shared storage pool Deploy assets as needed Reduce levels of unused physical storage Avoid pre-allocating physical storage to applications Reduce

32、 operating costs Fewer disks consume less power, cooling and floor space Reduce downtime Less disruptive to applications 2009 EMC Corporation. All rights reserved.精选ppt - 27Virtual Provisioning Thin Pool Expansion Adding drives to the pool non-disruptively increases available shared capacity for all

33、 Thin LUNs in pool Drives can be added to a Thin Pool while pool is being used in production Allocated capacity is reclaimed by the pool when Thin LUNs are deleted Do not defragAdditional Disk Drives“Test & Dev Pool 2” 2009 EMC Corporation. All rights reserved.精选ppt - 28Traditional vs. Thin LUNs

34、Use RAID Groups and traditional LUNs When microseconds of performance matters For the best and most predictable performance For precise data placement You are not as concerned about space efficiencyUse Virtual Provisioning with Thin Pools and Thin LUNs When the best space efficiency is needed For mi

35、nimal host impact When energy and capital savings are paramount For applications where space consumption is difficult to forecast 2009 EMC Corporation. All rights reserved.精选ppt - 29Lesson SummaryKey points covered in this module: Virtual Provisioning Thin vs. Traditional LUNs Benefits of Virtual Pr

36、ovisioning 2009 EMC Corporation. All rights reserved.精选ppt - 30Module SummaryKey points covered in this module: Virtualization technologies and forms SNIA storage virtualization taxonomy Storage virtualization configuration Storage virtualization challenges Types of storage virtualization Virtual pr

37、ovisioning overview 2009 EMC Corporation. All rights reserved.精选ppt - 31Check Your Knowledge What are the four forms of virtualization? Difference between in-band and out-of-band implementation. What are the challenges of storage virtualization? What is virtual provisioning? 2009 EMC Corporation. Al

38、l rights reserved.Cloud Storage Infrastructure 2009 EMC Corporation. All rights reserved.精选ppt - 33Challenges with Traditional Storage Approach Not designed to scale in the multi-petabyte Addition of new arrays for capacity enhancementCost and management overheadIncreased time to market Can address

39、transactional and distributed computing But fell short for Internet Era requirements Designed for Operation Within ITs Walls 2009 EMC Corporation. All rights reserved.精选ppt - 34Cloud Storage Infrastructure: The Big Picture To deal with Internet Era data growth A massively scalable infrastructure is

40、required One that offers global data distribution, self-healing, self-management, and multi-tenancy features A Cloud approach to storage A cost effective approach to handling internet era data growth Focusing on five key infrastructure requirementsInfinite ScaleNo BoundariesOperationally EfficientSe

41、lf-ManagementSelf-Healing 2009 EMC Corporation. All rights reserved.精选ppt - 35Use of Cloud Computing Resources“Cloud computing” takes hold as 69% of all internet users have either stored data online or used a web-based software applicationSource: “Use of Cloud Computing Applications and Services”, Pew Internet & American Life Project, 9/12/2008 2009 EMC Corporation. All rights reserved.精选ppt - 36Defining Cloud Computing“Cloud Computing is an emerging IT development, deployment and delivery model, enabling real-time delivery of products,