云计算与虚拟化技术 第7讲: Storage Devices 阮晓龙 13938213680/n@hactcm edu cn http://cloud.xg.hactcm.edu.cn http://www.51xueweb.cn 河南中医药大学信息管理与信息系统教研室 信息技术学院网络与信思系统科研工作室 20194
2 讨论提纲 a Storage Design Importance of Storage Design Examining Shared Storage Fundamentals Explaining RAID m Understanding VSAN o Storage Array Fibre channel u Fibre Channel over Ethernet(FCoE) iSCS Network File System(NFS) a Case (FC-SAN/iSCSI/NFS) 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
3 1.Storage Design 1.iMportance of Storage Design a Storage design has always been important, but it becomes more so for virtualized intrastructure, for mission-critical applications, and for offerings based on Infrastructure as a Service(laaS a You can probably imagine why this is the case Advanced Capabilities o Many of vSphere's advanced features depend on shared storage; vSphere High Availability(HA), vSphere Distributed Resource Scheduler(DRS vSphere Fault Tolerance(FT), and some parts of VMware Site Recovery Manager all have critical dependencies on shared storage 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
4 1.Storage Design 1.iMportance of Storage Design a You can probably imagine why this is the case Performance a People understand the benefits that virtualization brings--consolidation higher utilization, more flexibility, and higher efficiency o But often, people have initial questions about how vSphere can deliver performance for individual applications when it is inherently consolidated and oversubscribed o Likewise, the overall performance of the vms and the entire vSphere cluster both depend on shared storage, which can also be highly consolidated and oversubscribed 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
5 1.Storage Design 1.iMportance of Storage Design a You can probably imagine why this is the case Availability o The overall availability of your virtualized infrastructure, and by extension, the VMs running on that infrastructure, depend on the shared storage infrastructure o Designing high availability into this infrastructure element is paramount o If the storage is not available, vSphere ha will not be able to recover, and the∨Mswl‖ be affected 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
6 1.Storage Design 1.iMportance of Storage Design a Although design choices at the server layer can make the vsphere environment relatively more or less optimal, design choices for shared resources such as networking and storage can sometimes make the difference between virtualization success and failure This is especially true for storage because of its critical role u Storage design choices remain important regardless of whether you are using storage area networks(SANs), which present shared storage as disks or logical units( LUNS); network attached storage(NAS), which presents shared storage as remotely accessed file systems; or a converged storage infrastructure using local server disks such as VSAN You can create a shared storage design that lowers the cost and increases the efficiency, performance, availability, and flexibility of your vSphere environment 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
1.Storage Design 1.iMportance of Storage Design You have to be fully aware of The Importance of Properly Designed Storage 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
8 1.Storage Design 1.2Examining Shared Storage Fundamentals FIGURE 6.1 When ESXi hosts are connected to that same shared storage, y share capabilities Storage Network Storage Array 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
9 1.Storage Design 1.2Examining Shared Storage Fundamentals a Several basics of storage Local storage versus shared storage a Common storage array architectures RAID technologies a Midrange and enterprise storage array design a Protocol choices 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
0 1.Storage Design 1.2Examining Shared Storage Fundamentals o An ESXi host can have one or more storage options actively configured, including the following Local SAS/SATA/SCSI storage a Fibre channel a Fibre Channel over Ethernet(Fcoe a iSCSI using software and hardware initiators a NAS (specifically, NFS InfiniBand 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn