Virtual machine migrating method and system based on NUMA architecture

Abstract

The invention discloses a virtual machine migrating method and system based on the NUMA architecture. The virtual machine migrating method based on the NUMA architecture comprises the steps that the configuration information of a virtual machine to be migrated is obtained, and a temporary file is generated according to the content in a memory page and a virtual machine register which have already been used by the virtual machine to be migrated and the state of an I/O device; the virtual machine to be migrated is stopped; the node information of all physical nodes in a target host is obtained, and whether a target node exists on the target host is judged according to the node information and a migration command; if the target node exists on the target host, the virtual machine to be migrated is migrated to the target node according to the temporary file and the configuration information; if the target node does not exist on the target host, an error report is sent. According to the virtual machine migrating method and system based on the NUMA architecture, it is guaranteed that virtual nodes of the NUMA topological structure of the virtual machine correspond to the NUMA nodes of a physical machine in a one-to-one mode on the basis of migration, the performance degradation of the virtual machine is small, the NUMA topological structure of the virtual machine can be changed according to the hardware condition of the target host, and thus the virtual machine can be adapted to more diversified hardware environments.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a virtual machine migration method and system based on NUMA architecture. Background technique [0002] In computer technology, virtualization technology is a technology that abstracts physical computing resources, such as CPU, memory, network and storage, so that users can use these resources more reasonably. It has been widely used in some scenarios such as Internet services and cloud computing. [0003] Early computers adopted the SMP structure (Symmetric Multi-Processing, symmetric multi-processing structure), that is, all the memory is shared by all CPUs, and each CPU can arbitrarily access any address of the memory. However, with the development of hardware, especially as the number of CPU cores increases, the existing SMP structure is prone to memory access conflicts, that is, different CPUs access the same memory at the same time, resulting in bus conflicts, and access...

AI Technical Summary

Problems solved by technology

However, it brings about the problem of unbalanced memory access speed: the overhead of remote memory access is much greater than the overhead of local memory

[0006] This technology will also bring some new problems: since the virtual nodes of the virtual machine are strictly bound to the physical nodes

However, this method also has obvious disadvantages: the virtual machine after the change can only be on the same physical machine as the virtual machine before the change, and if the user policy wants to transfer it to another physical machine, it cannot be solved by this technology.

In addition, the existing migration technology migrates virtual machines in units of nodes, and cannot flexibly place virtual machine memory in units of pages according to the current load, which limits the effect of load balancing

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