Design And Realization Of File Manage And Data Transfer Subsystem In Grid Environment

Grid is a new technology and an advanced information infrastructure, which goes with the rapid development of computer, information and network technology, it provides a new approach to integrate various resources ulteriorly."Grid Service System" is a computing platform which takes super computers as its kernel, it aggregates many high performance computing resources such as super computers and clusters, and forms a grid computing environment which orients the domain of high performance computing.The paper bases on analyzing the hiberarchy of the "Grid Service System", takes file manage and data transfer subsystem as study objects, and then it constructs the realization prototype of the subsystem using Web Services technology. In file manage subsystem, it realizes the management of dummy storage space for the user using database technology; in the aspect of data transfer, it makes use of multithreading download which is controlled by the third party and break point transfer technology to improves the performance and reliability of data transfer, for the convenience of managing the downloaded data for the user, it centralizes the administration of the user's data which is on diverse computing resources, and provides the uniform data view for the user.At the end of the paper, presents the "not landed" transfer model when the control of the firewall is very strict, besides it contrasts with the "upload directly" model according to the test data, the results shows that the "not landed" model could satisfy the user's demand on the performance.