In addition to the virtualization layer, it has two infrastructure layers: a host operating system layer and a guest operating system layer.
![virtual machine virtual machine](https://cdn11.bigcommerce.com/s-10c6f/products/32409/images/51848/WS20291-14__83553.1573587723.450.450.jpg)
Similar to the previous diagram, the figure below shows how a type-2 hypervisor architecture differs from a type-1 hypervisor architecture. VM Virtualization via a Type 2 Hypervisor
#VIRTUAL MACHINE SOFTWARE#
Temporal isolation ensures that the execution of software on one VM does not impact the temporal behavior of software running on another VM.Physical isolation ensures that software executing in different virtual machines cannot access the same physical hardware (e.g., memory locations such as caches and RAM).Interference can occur when the execution of one application running in one VM affects the execution of another application running in a second VM by violating either the spatial or temporal isolation of the VMs: Applications share VMs, the hypervisor, and cores as shared resources, thereby providing single points of failure and possible interference paths.By providing simulated hardware environments, the VMs enable the use of different operating systems.This architecture adds an additional virtualization layer, consisting of two sub layers (VMs and type-1 hypervisor), to an architecture that was already made complex by having multiple cores.Some interesting aspects of this architecture include the following:
![virtual machine virtual machine](https://www.how2shout.com/linux/wp-content/uploads/2021/02/Run-Linux-GUI-desktop-online-virtual-machine-in-browser-min-1200x640.jpg)
This diagram also shows how these applications, operating systems, and virtual machines have been allocated to the four cores of a multicore processor. VM Virtualization via a Type 1 Hypervisorīy providing additional details, the notional diagram below shows how 14 software applications running on various guest operating systems have been deployed onto 7 virtual machines running on a type-1 hypervisor.
![virtual machine virtual machine](https://wjn.sa/wp-content/uploads/2020/10/Breaking-Encrypted-Virtual-Machines-Recovering-VMWare-Parallels-and-VirtualBox-Passwords.jpg)
#VIRTUAL MACHINE SERIES#
The first blog entry in this series introduced the basic concepts of multicore processing and virtualization, highlighted their benefits, and outlined the challenges these technologies present. This posting is the third in a series that focuses on multicore processing and virtualization, which are becoming ubiquitous in software development.