VM Ware virtualization overview.pptx
- 2. VIRTUALIZATION IN A NUTSHELL Simply put, virtualization is an idea whose time has come. The term virtualization broadly describes the separation of a resource or request for a service from the underlying physical delivery of that service. With virtual memory, for example, computer software gains access to more memory than is physically installed, via the background swapping of data to disk storage. Similarly, virtualization techniques can be applied to other IT infrastructure layers - including networks, storage, laptop or server hardware, operating systems, and applications.
- 3. COMPARISON BEFORE AND VIRTUALIZATION
- 4. TYPES OF VIRTUALIZATION Vsphere Product suite NSX VSAN VDI
- 5. HYPERVISOR • A hypervisor, also called a virtual machine manager (VMM), is a program that allows multiple operating systems to share a single hardware host. Each operating system appears to have the host's processor, memory, and other resources all to itself. • However, the hypervisor is actually controlling the host processor and resources, allocating what is needed to each operating system in turn and making sure that the guest operating systems (called virtual machines) cannot disrupt each other.
- 7. VIRTUAL MACHINES • A virtual machine is a software computer that, like a physical computer, runs an operating system and applications. Multiple virtual machines can run on the same host system concurrently. A virtual machine has its own virtual hardware, including a virtual CPU, memory, a hard disk, and a network interface card.
- 8. VM WARE VIRTUAL INFRASTRUCTURE The VMware virtual infrastructure has the following software layers: • Virtualization layer: ESXi • Management layer: vCenter Server
- 9. TECHNIQUES OF VMWARE • VMotion • Storage VMotion
- 10. VMOTION • VMotion allows you to quickly move an entire running virtual machine from one host to another without any downtime or interruption to the virtual machine This is also known as a “hot” or “live” migration. • The entire state of a virtual machine is encapsulated and the VMFS file system allows both the source and the target ESX host to access the virtual machine files concurrently. The active memory and precise execution state of a virtual machine can then be rapidly transmitted over a high speed network. The virtual machine retains its network identity and connections, ensuring a seamless migration process.
- 11. STORAGE VMOTION • Storage VMotion is a new feature introduced in ESX 3.5, it allows you to migrate a running virtual machine and its disk files from one datastore to another on the same ESX host • The difference between VMotion and Storage VMotion is that VMotion simply moves a virtual machine from one ESX host to another but keeps the storage location of the VM the same, Storage VMotion on the other hand changes the storage location of the virtual machine while it is running and moves it to another datastore on the same ESX host. The virtual machine can be moved to any datastore on the ESX host which includes local and shared storage.