6 1.Cloning VMs 1.cLoning a Virtual Machine Demo with vSphere Web Client step by step to clone a VM Cloning Running VMs It's possible to clone even powered-on VMs 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
1.Cloning VMs 1.iNtroducing vSphere Instant Cloning o Creating a clone of a VM in a matter of minutes can be very helpful, but if you want to create a large number of identical VMs, the cloning process can take hours Let's say your job involves administering a pool of virtual desktops in a virtual desktop infrastructure(VDI) farm, or maybe you are spinning up a large number of vms for developers to work on an exact replica of the main production environment VMware has enhanced the traditional cloning capabilities to increase the speed and reduce the resource overhead when there's a need to create multiple versions of a source VM at the same time 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
8 1.Cloning VMs 1.iNtroducing vSphere Instant Cloning a It's easy to derive from its name that instant cloning is fast, but just how fast is it? a That depends on a few things, such as a the ESXi host speed, utilization, and the size of the source VM, but usually it is somewhere between one and a few seconds a Not only can it create VMs quickly, but it can do it in parallel too--up to eight VMs can be cloned simultaneously a In a best-case scenario, you could generate 100 brand new identical VMs in a 10- to 20-second time frame 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
9 1.Cloning VMs 1.iNtroducing vSphere Instant Cloning a The instant Clone feature will create vms that run in the exact state their source vm does by leveraging a few technologies: vMotion Transparent Page Sharing, and delta disks m With traditional VM cloning, a complete set of the source VM's virtual hardware is created You get a copy of the all virtual disk (. VMDk) files, a copy of the VMs configuration (VMX) files, and even a copy of the in-guest memory (if the cloned VM is currently running) 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
10 1.Cloning VMs 1.iNtroducing vSphere Instant Cloning a The instant Clone feature will create vms that run in the exact state their source vm does by leveraging a few technologies: vMotion Transparent Page Sharing, and delta disks The Instant Clone works is completely different o The result is more or less the same, in that you still get a new VM, but you don't get brand new copies of the virtual disks or in-guest memory for unning vms o Instant Clone uses a function known as copy-on-write to share both memory and disk data with the source VM, and only making a copy of the changes when the cloned VM needs to modify something o That way, it can keep a single copy of all data without needing to duplicate anything, and it can create new VMs based on the same original VM very quickly 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn