基于虚拟化技术的开放式实验室管理系统

发布时间：2018-02-12 01:29

本文关键词： Hyper-v虚拟化 Wi-Fi 排课算法云计算　出处：《大连海事大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着实验教学内容的丰富,海量的数据应用需要被迁移到实验教学平台中,异构网络、静态资源、管理复杂、成本高等问题成为新一轮教学改革浪潮中的重要突破口。本文提出对基于虚拟化技术的开放式实验室管理系统进行研究。通过服务器虚拟化、网络设备智能化等技术实现实验室的开放化及智能化管理,在云计算环境下优化计算资源,为客户端瘦身,为师生提供更加优质的实验教学服务。首先,搭建大型的、适用于海量数据计算与存储的云计算平台,把用户数据、应用软件等部署在服务器集群上,通过并行及分布式计算技术来为用户提供高性能服务。使用瘦客户机取代主机,极大地降低了实验室建设成本,提高了硬件设备的可扩展性。为保证客户端视频播放效果,采用视频重定向技术,将视频文件直接传送到瘦客户端,经ARM硬件芯片进行解码播放,降低了对服务器CPU的占用率。为达到与PC 一致的云桌面用户体验,采用RDP8.0高效交付协议,通过自动检测网络状态、自适应图形、媒体流等优化技术,有效提升了传输效率。其次,设计与实现开放式实验室管理系统网站,功能包括:设备信息管理、资源统计、预约管理、课程管理、用户管理等,在实现基本的信息电子化管理的同时,为学生提供了一体化的实验预约服务及上机指导;为教师提供了高效的实验课排课功能,.排课问题属于NP完全问题(多项式复杂程度的非确定性问题),而实验课编排的复杂度要高于普通理论课编排,因此,提出了集自动排课算法和手动选课相结合的排课功能。自动排课算法用优先级搜索与对比来取代最短路径法则,简化搜索层级,降低排课算法的时空复杂度。最后,设计与实现设备电源的无线控制终端,为每台实验设备配置一个AP节点,通过布置Wi-Fi网络来实现设备电源的智能化控制,学生预约实验成功后,SMS模块会自动发送短信通知,学生可以自主刷卡上机,由客户端服务器发送命令打开设备电源。在实际测试中,视频出传输流畅,瘦客户端能够实时接收、转码、播放。每增加一个客户端播放视频,服务器CPU、内存、占用带宽等指数约增长4.5%。每个客户端占用宽带约1.4Mbps,网络延时在1.3s以内,满足用户需求。
[Abstract]:With the rich content of experimental teaching, massive data applications need to be migrated to the experimental teaching platform, heterogeneous networks, static resources, complex management, The problem of high cost has become an important breakthrough in the new wave of teaching reform. This paper puts forward the research of open laboratory management system based on virtualization technology. The intelligent network equipment and other technologies realize the opening and intelligent management of the laboratory, optimize the computing resources in the cloud computing environment, reduce the size of the client, and provide higher quality experimental teaching services for the teachers and students. Cloud computing platform suitable for mass data computing and storage, deploying user data and application software on server cluster, providing high performance services for users through parallel and distributed computing technology. It greatly reduces the cost of laboratory construction and improves the expansibility of hardware equipment. In order to ensure the effect of video playback on client side, video files are transferred directly to thin client by video redirection technology. The ARM hardware chip is used to decode and play, which reduces the utilization of server CPU. In order to achieve the cloud desktop user experience consistent with PC, RDP8.0 is adopted to deliver the protocol efficiently, and the network state is automatically detected and the graphics are adaptive. Media flow and other optimization techniques effectively improve the transmission efficiency. Secondly, design and implementation of an open laboratory management system website, including: equipment information management, resource statistics, reservation management, course management, user management, etc. At the same time, it provides students with integrated experimental reservation service and computer guidance. This problem belongs to the NP complete problem (the degree of polynomial complexity is non-deterministic problem), but the complexity of the experimental course arrangement is higher than that of the common theory course arrangement, therefore, the problem of arranging the experiment course belongs to the NP-complete problem, and the complexity of the experimental course arrangement is higher than that of the general theory course arrangement. This paper puts forward the course scheduling function which combines automatic course scheduling algorithm with manual course selection. Automatic course scheduling algorithm uses priority search and contrast to replace the shortest path rule, simplifies the search level and reduces the space-time complexity of the course scheduling algorithm. The wireless control terminal of equipment power supply is designed and implemented. An AP node is configured for each experimental device. The intelligent control of the equipment power supply is realized by arranging the Wi-Fi network. After the success of the student reservation experiment, the Wi-Fi module will automatically send short message notification. Students can independently swipe the card on the computer, the client and server send orders to open the device power. In the actual test, the video output is smooth, thin client can receive, transcode, play in real time. Each additional client plays video, Server CPU, memory, bandwidth and other exponent increases 4.5. Each client occupies about 1.4 Mbps. the network delay is less than 1.3 seconds to meet the needs of users.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP311.52

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