Research And Implementation Of The Enhanced Features Of JMS

Since NQS (Network Queuing System) occurred in 1986, IMS (Job Management System) has been progressing rapidly recently. IMS has been adopted by many large research organizations and corporations for an important warranty of improving production efficiency and promoting ratio of resource usage. And lots of researches and developments have been carried out according to the actual need. However, the domestic research in this field has not achieved exciting success.In order to fill this research vacancy, a IMS product has been studied as a whole meticulously. Based on the NQS, the architecture and functions of this IMS product are analyzed and expounded in detail. JobNetwork, High Availability and Security are outlined as the enhanced features in JMS.JobNetwork extends the concept of job. The platform independent JobNetwork script can construct unit jobs to a job network according to the dependency of these jobs. And this job network can be submitted and controlled by JMS as a whole. A new static scheduling algorithm based on job network DAG module is present to balance network workload statically as the partner of the dynamic load balancing mechanism.The availability of JMS is a very important feature. A new architecture of HA (High Availability) JMS is applied based on current cluster technology. HA JMS is running as the virtual service on the High Availability Cluster. Once a failure occurs, HA JMS can be shifted transparently to another node in cluster (FailOver). After that failure is removed, HA JMS can go back to the original node to ensure the continuity and availability of jobs (FailBack). And moreover, HA JMS for MSCS (Microsoft Cluster Server) has been implemented.In order to improve the imperfection of security in JMS, a whole security solution powered by Windows NT Operating System has been realized. Furthermore, a new Domain Security policy applies to deal with Domain module in NT platform especially.