智能终端虚拟化环境中新型存储系统管理与优化关键技术研究

Mobile virtualization can provide a secure and reliable mobile ecosystem in many aspects, such as personal privacy, corporate and public security. While it enables a new breed of mobile systems research, mobile virtualization also posts new challenges to the management and design of memory and storage subsystems, due to the sharing of resources (notably memory and storage space) in virtualized environments. Considering the limited energy and compute power in mobile devices, how to effectively satisfy the memory and storage needs by each virtual machine (VM) becomes an important issue. Emerging byte-addressable, non-volatile memory (NVRAM) can effectively ease the situation. Taking the advantage of NVRAM’s high density, low leakage power, high performance and non-volatility, this project aims to optimize the memory and storage subsystems in virtualized mobile devices by co-designing hardware and software. In particular, we consider the trade-offs between performance, energy and NVRAM/flash space utilization. We focus on optimizing NVRAM-based memory management, checkpointing and VM image storage in virtualized mobile systems. Finally, we will implement a prototype based on a mainstream embedded board with hardware virtualization support, and evaluate our proposed techniques on top of it. This project will lead to solutions to ease the bottleneck of memory/storage subsystems in mobile virtualization, and provide theoretical foundations and technical guidance for future research and development of mobile virtualization.

智能终端虚拟化技术可以为个人隐私、企业管理及公共安全等领域应用构建安全可靠的系统环境，是未来智能终端技术发展的新方向。但传统虚拟机对存储系统的共享模式和访存需求给智能终端内存和外存管理与设计带来了新的挑战。在资源受限的智能终端虚拟化环境中，如何高效地满足各虚拟机的访存需求是迫切需要解决的关键问题。本项目基于新型非易失性存储技术在存储密度、能耗、速度和非易失性等方面的优势，研究面向智能终端虚拟化环境的存储系统管理与软硬件协同优化技术。从系统性能、能耗和存储空间等多方面，分别在内存管理、文件系统以及外存管理等不同层次研究虚拟机感知的内存管理技术、虚拟机检查点快照存储优化技术以及虚拟机镜像文件存储优化技术，并构建原型验证平台，实现关键技术验证。本项目有望为解决终端虚拟化环境中存储系统的性能瓶颈问题提供新思路，为终端虚拟化研究和应用提供有用的理论和技术成果。

智能终端虚拟化技术可以为个人隐私、企业管理及公共安全等领域应用构建安全可靠的系统环境，是未来智能终端技术发展的新方向。但传统虚拟机对存储系统的共享模式和访存需求给智能终端内存和外存管理与设计带来了新的挑战。在资源受限的智能终端虚拟化环境中，如何高效地满足各虚拟机的访存需求是迫切需要解决的关键问题。新型非易失性存储器，以其数据存储的持久性、能耗低、延迟小和可缩性强等特点，为突破“存储墙”和“能耗墙”问题创造了机遇。本项目提出利用新型非易失性存储器的技术优势，开展面向智能终端虚拟化环境的新型存储系统管理与优化关键技术研究。..本项目基于新型非易失性存储技术在存储密度、能耗、速度和非易失性等方面的优势，研究了面向智能终端虚拟化环境的存储系统管理与软硬件协同优化技术。从系统性能、能耗和存储空间等多方面，分别在内存管理、文件系统以及外存管理等不同层次研究了虚拟机感知的内存管理技术、虚拟机检查点快照存储优化技术以及虚拟机镜像文件存储优化技术，并构建了原型验证平台，实现了关键技术验证。本项目为解决终端虚拟化环境中存储系统的性能瓶颈问题提供了新方案，为终端虚拟化研究和应用提供了有用的理论和技术成果。