Dynamic memory management system based on memory hot plug for virtual machine

Abstract

The invention discloses a dynamic memory management system based on memory hot plug for a virtual machine, comprising a memory monitoring module, a memory distributing module and a memory hot plug module. The memory hot plug module adopts Linux memory hot plug mechanism to realize memory hot plug on a semi-virtual Linux virtual machine, thereby breaking through the initial memory toplimit of the virtual machine and efficiently improving the memory expandability of the virtual machine by increasing and reducing the memory randomly. On one hand, the memory distributing module dynamically predicts the memory requirement of the virtual machine and balances the memory pressure of each virtual machine, thereby being capable of satisfying the memory requirement of the virtual machine and also improving the memory utilization ratio of a physical machine; on the other hand, the memory distributing module can establish a new virtual machine by reasonably reducing the memory of the existing virtual machine when the memory of the physical machine is not enough, thereby realizing memory overuse and improving the memory utilization ratio of the physical machine.

Description

technical field [0001] The invention belongs to the field of computer applications, relates to memory management of a Xen paravirtualized virtual machine, and specifically relates to a dynamic memory management system in a multi-virtual machine environment. Background technique [0002] The resource scale of the current computing system is continuously expanding, the processing capacity is rapidly increasing, the types of resources are becoming more and more abundant, and the application requirements are flexible and diverse. Virtualization technology can dynamically organize various computing resources to realize a transparent and scalable computing system architecture, so as to flexibly build a computing environment that meets various application requirements and improve the efficiency of computing resources. Various virtualization solutions are constantly emerging, and the virtualization software Xen is undoubtedly one of the best. Xen is an open source virtual machine p...

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