The virtual method and virtual device based on operating system layer

Abstract

The embodiment of the present invention relates to a virtual method and virtual device based on operating system layer. Through intercepting the invoking request of system resource at system invocation layer, the host path of the system resource is redirected to the corresponding path under the directory of virtual machine; the virtualization based on operating system layer may be realized. As no support of hardware abstract layer is needed, it can meet the demand of failure tolerance and intrusion tolerance system and is characterized by small occupation of system resource, high flexibility and short startup delay.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to an operating system layer-based virtualization method and virtualization device. Background technique [0002] With the popularity of computers and the Internet, security threats are increasing year by year, malicious programs are causing more and more serious damage, and the demand for fault-tolerant and intrusion-tolerant systems is also increasing. Such systems require the ability to execute unsafe programs in real-world environments without suffering permanent harm. [0003] Virtual machine technology can perfectly meet the above needs because it provides an executable environment isolated from the host system. Virtual machine technology is a technology that creates one or more executable environments on a physical host. Each virtual machine represents an instance of a potential physical host and does not interfere with each other. This property of isolation makes virtua...

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Problems solved by technology

[0004] The inventor found in the process of implementing the present invention that most of the existing virtual machine systems are hardware layer virtual machine systems, and virtual machine technology needs the support of the hardware abstraction layer. The environment established by the virtual machine is equivalent to the entire actual operating environment. The virtual machine may consume a lot of hard disk space, and the existing virtual machine system often needs to occupy a large amount of system resources during the specific implementation process, and there is a possibility of loss of system performance

For applications that frequently require the startup and termination of virtual machines, it is not flexible enough, and some existing virtual machine systems operate too slowly to be suitable for practical applications

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