Virtual-machine memory extension method and system based on remote SSD

Abstract

The invention discloses a virtual-machine memory extension method and system based on a remote SSD, and relates to the technical field of high-performance virtualization. The virtual machine memory extension method based on the remote SSD includes the steps that a virtual machine is created and operated at a virtualization node, when the virtual node conducts secondary page-table page misssion treatment, firstly, memory space is distributed for the virtual machine in a local memory, after the application amount of the local memory reaches a set threshold value, part of local memory paging is replaced by a remote SSD node, the virtual node maintains the distribution from the partial local memory paging to the remote SSD node through a shadow-customer physical address mapping table, the remote SSD node is firstly stored in the local memory of the remote SSD node after receiving the paging data, and when the application amount of the local memory of the remote SSD node reaches the set threshold value, part of memory paging is replaced to a local SSD to be stored.

Description

technical field [0001] The invention relates to the technical field of high-performance virtualization, in particular to a remote SSD-based virtual machine memory expansion method and system. Background technique [0002] High-end applications such as large-scale scientific computing, large-scale memory databases, and massive data analysis and mining have high requirements for memory capacity. "Large memory" systems can not only meet the needs of such applications, but also compared with distributed solutions, a single memory address The programming model of the space is simpler and easier to use, which can reduce the mental burden of users and improve productivity. However, the large memory system is a scale-up solution, which is limited by the particle price, number of slots, capacity density, etc., and the large memory system DDR (Double Data Rate) memory technology, which is currently used in mainstream commercial servers, is designed to optimize bandwidth but consumes a...

AI Technical Summary

Problems solved by technology

[0005] Virtualization is the basic technology of cloud computing, but the resource capacity of the virtual machine in the cloud is limited by the resource configuration of the physical host machine, and the sharing and utilization of non-local memory and storage resources, traditional NAS / NFS / SMB, SAN / Solutions such as iSCSI are limited by the overhead of protocol processing and cannot provide the best performance; although software solutions such as Fatcache and Tachyon / Alluxio are based on standard network interfaces and have no additional protocol processing overhead, they provide their own API interfaces. The application needs to be modified, and there are certain limitations in compatibility. Native solutions such as Flashcache and ReadyBoost are implemented by the operating system, which can transparently realize the use of local SSDs for applications, but they need to modify the kernel, and development and debugging are complicated and not conducive to maintenance.

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