Virtual machine data exchange method, device and system

Abstract

An embodiment of the present invention provides a data exchange method for a virtual machine, including: obtaining data that needs to be sent to a destination node in a physical host, and determining whether the destination node is a node in the physical host or a node outside the physical host according to the data, if If it is a node in the physical host, then determine the destination virtual network card interface, and send the data to the corresponding destination virtual machine through the virtual network card corresponding to the destination virtual network card interface, if it is a node outside the physical host, then determine the physical network card interface, and send the data to the outside of the physical host through the physical network card corresponding to the physical network card interface. In addition, embodiments of the present invention also provide corresponding devices and systems.

Description

technical field [0001] The present invention relates to the technical field of communications, and in particular to a data exchange method, device and system for a virtual machine. Background technique [0002] After the emergence of virtualization technology, multiple virtual machines (VM, Virtual Machine) coexist inside a host (Host, hereinafter also referred to as a physical host), and the virtual machine appears to the user as a normal physical machine. In addition to the need for data exchange between machines, there is also a need for communication between the virtual machine and the external network. [0003] Currently, there are two mainstream virtual machine data exchange solutions: soft switch and hard switch. Among them, software switch refers to using software to imitate the behavior of a physical switch, which is relatively cumbersome to implement; The switch implements a switching logic behavior, that is to say, the external data exchange of the virtual machin...

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Problems solved by technology

[0004] During the research and practice of the prior art, the inventors of the present invention have found that although the existing hard switch solution has improved performance and flexibility compared with the soft switch, its data exchange efficiency is not as good as that of the soft switch. Not high enough, for example, all virtual machine communication needs to go through the network card first, and whether it communicates with the unit in the host or the device outside the host will consume the bus bandwidth of the peripheral original expansion interface (PCI, Pedpherd Component Interconnect), etc., and , in this scheme, the communication between virtual machines in the host will also affect the communication between other virtual machines in the host and devices outside the host

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