基于COW双写的虚拟机磁盘全量迁移关键技术

The Key Technology of Virtual Machine Disk Full Migration Based on COW Double Writing

虚拟机热迁移技术是指可以把一个虚拟机从一台物理服务器迁移到另一台物理服务器上,整个过程虚拟机内部业务不中断,虚拟机热迁移大多是基于共享存储进行迁移,磁盘未使用热迁移技术。提出主要解决磁盘热迁移优化的算法及方案,主要适用于将虚拟机从一个存储载体以全量的形式热迁移至另一个存储载体,亦适用含有内存迁移的虚拟机整机迁移。通过算法将实现虚拟机的快速部署、快速动态分配等各种应用场景,达到节能降耗、负载均衡的目的。

Virtual machine hot migration technology refers to that a virtual machine can be migrated from one physical server to another.The internal business of virtual machine is not interrupted in the whole process.Virtual machine hot migration is mostly based on shared storage,and the disk does not use hot migration technology.This paper puts forward the algorithm and scheme to solve the hot migration optimization of disk.It is mainly suitable for the hot migration of virtual machine from one storage carrier to another in the form of full quantity,and also suitable for the whole virtual machine migration with memory migration.Through the algorithm,various application scenarios such as rapid deployment and dynamic allocation of virtual machine will be realized to achieve the purpose of energy saving,consumption reduction and load balancing.