Research on Concurrency Control Scheme of CVE Based on Role-privilege

Many users access the shared object at the same time in the collaborative virtual environment,so the conflict can't be avoided.In the existed system,locked mechanism is adopted.It requires the shared object be locked before updated.So many users have to wait for a long time for the updating privilege and the efficiency of the system is low.According to this,several design considerations of concurrency control of CVE is proposed and role-privilege theories are also adopted.Furthermore,a new role based on concurrency control scheme of CVE is introduced.This scheme can achieve the consistency of the virtual environment and optimize the system performance.