The Design And Realization Of Online Real-Time Experiment Judgement System Controlled By LVS Algorithms

Software experiment is a important step to Education of Computer Science. It can not only check if students have master Algorithms theory, but also can examine the ability of code writing in regulate time. At present, The subject publish, experiment watching and the judgments of source code all depend on manual work. So there are some bugs in quality control of experiment and appraise of source code.The paper analyses disfigurement of Code Writing Experiment. It advances a solution of a kind of online real-time experiment judge system controlled by LVS(Linux Virtual Server) Algorithms. The system uses net load balance technique and packet capture technique.The paper compares advanced technique of IP-Based Load Balance, including NAT Load Balance,IP Tunnel Load Balance and Direct Routing Load Balance. Against Linux system, it explains eight Scheduling Algorithms in Operating System Kernel. The system uses Weighted Least-Connection Scheduling to realize Load Balance in Experiment.At the same time, the paper introduce common technique of Packet Capture. It focus on the structure and principle of Packet Capture development tool WinPcap.The system realize Plagiarism Monitoring by using WinPcap.