VMware Virtualization and Hypervisor
Virtualization gives the administrators ability to use and manage less physical serves and consolidate the servers into a few physical machines.
- Easier management: Because one physical machine hosts several Virtual Machines (VM servers). So; administrators will spend less time in managing, updating and configuring physical machines.
- Money saving: The networks will use less physical servers. The companies will save a lot of money by purchasing fewer physical servers.
- Better resource management: The network administrators will use the most of the CPU, Memory, Hard disk resources by installing several Virtual Machines on each physical server.
- Easy migration: In case of any hardware failure; the network administrators will be able to easily transfer the VMs to another physical server and run the VM from the healthy server.
- Power saving: Having fewer hardware (Physical serves) will result in saving energy as well.0
- Easier Maintenance: Maintenance of the servers will be easier because of the portability feature, easier backup creation, Snapshot feature and ….
- Easier upgrade of resources: The addition and removal of the Memory, CPU and disk space resources is easier and does not require shutting down the server and adding new hardware to the server. It happens all in a virtual environment and it is fast and easy.
There are several virtualization technologies in the market: Microsoft Hyper-V, VMware, Citrix, Linux, Oracle and many more…. These platforms that virtualize the operating systems on top of the hardware are called hypervisors.
Some of these virtualization technologies are directly installed on top of the hardware and work as an intermediate platform that connects the Virtual machines to the Hardware on the server. These are called Type-1hypervisors. This kind of hypervisor is also called bare-metal hypervisor as it is directly installed on the hardware.
Vmware ESXi is a very good example of the Type1 hypervisor virtualization platform. The ESXi is installed directly on the physical hardware and the virtual machines are installed on top of the Vmware ESXi host.
The type2 hypervisor is a kind of virtualization platform that is installed on another operating system. So the type2 hypervisor does not directly connect to the hardware and physical server. VMware workstation is a good example of type2 hypervisor. you need to install an operating system on your server/hardware, then from inside that OS you can install vmware workstation.