What is a virtual machine monitor?

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virtual machine monitor is a program that controls the behavior of multiple virtual machines in the system, allowing each user a fully functional system. In addition, each virtual network user will consider his computer as an autonomous entity, completely separated from the rest of the computing environment. However, a computer that hosts all virtual machines - and a virtual machine monitor program - is actually under control. Through this illusion of autocracy, a single computer with powerful hardware can allow more weaker hardware “drone” systems to use its resources in a relatively non -transparent way. The disadvantage is that all computers operating virtual machines depend on the host computer; If something happens to the host, all virtual machines will collapse immediately. A virtual computer user could have Windows Vista and a virtual computer with Windows XP at the same time. In the network, other network users have to access these inIrble computers for your own use. Here comes a virtual machine monitor.

While every virtual machine in the network works apparently alone, each machine actually uses the same hardware found on the host computer. The virtual machine monitor is a "traffic signal" that keeps everything in the system running smoothly. It tells each virtual computer when it can have access to the graphics card, memory, hard disk, processor and other hardware components in the system, preventing shortcomings and other anomalies.

The advantage is that weaker computers “borrow” the processing force of the stronger counts. By hosting virtual machines on a stronger computer and allowing weaker computers to own more powerful hardware, the overall performance of these weaker machines is supported. All idle cycles of CPU on a stronger computer can be devoted to running virtualTacs, which maximizes the efficiency of this powerful hardware.

However, this is a weak solution because it is bound to the health of the computer network. If the network fails, each virtual computer will be used by computers other than host-PC inactive because it will no longer be connected to the virtual computer monitor. Excessive amount of this solution can therefore lead to a large period of downtime if the network is subject to reliability.