基于云计算的可扩展云教室解决方案的设计与实现

摘要

针对当前基于 cluster 的电子虚拟教室的诸多不足，提出一种基于云计算的云教室的实现方案。该方案通过使用分布式文件系统解决了传统云教室扩展性差的问题，并在很大程度上提高云教室的 I ／O 性能；同时，通过线程调度机制实现了云教室资源调度管理以及多个云教室的同步读写。实验结果表明：该方案能够用于创建大规模高伸缩性的云教室，解决目前电子教室的可扩展性差、I ／O 性能低以及高峰用户读写响应慢等问题，达到设计要求。%As to the disadvantages of current cluster-based virtual e-learning classroom,this paper proposes an implementing solution of cloud-computing based cloud-classroom.This solution ravels out the problem of poor scalability of traditional cloud classroom by using the distributed files system technology,and improves to great extent the I /O performance of cloud classroom;meanwhile,through thread scheduling mechanism it realises the resources scheduling and management of cloud classrooms as well as the synchronised read-write process between many cloud-classrooms.Experimental result shows that the solution can be used to create large-scale cloud classroom with high scalability,solves the problems of existing e-learning classrooms including poor scalability,low I /O performance and slow read-write responses to users in peak time,and meets the design requirement.