Grid Environment Marine Information And Data Transmission Services

With the development of science and technology, the requirements of the highperformance computing are increasingly high. Grid can enable geographically widearea distribution of resources including computing resources and data resources organized in a uniform framework for sharing. How efficient to transfer the massive data is a very important problem in grid computing.Main data source of the marine environment : marine Satellite Remote Sensing, multibeam survey data,conventional previous marine survey, observing station buoy. These wide range of monitoring data, covering a wide range of professional disciplines, from multiple systems or monitoring units, across different platforms, data format and structure of different. Similar data and even in the data standards, data accuracy and resolution, the monitoring data of different density areas, such as projection and datum also have differences. Therefore, causing marine monitoring the flow of information is difficult to become a marine environmental information data storage, sharing and re-analysis of the key problems in the field of one, but so far there is a lack of breakthrough progress.To geographical distribution of the different resources of the marine environment of node data information different scales level visits and access to the grid to provide different server platform for data exchange between data and control methods, and define a more efficient scale data transmission grid agreement is very necessary.Through the grid structure of analysis and research, the paper focused on grid environment of marine information and data transmission services based on the Globus Toolkit tool kits and support for grid security architecture and mechanism of GridFTP file transfer protocol. GridFTP is a grid environment of the core data management module, with GridFTP, marine data can be shared. This service system, there is no need to service the marine data for all storage resources to concentrate on the server, only to different marine data storage resources with GridFTP server consolidation, data sharing platforms can be realized. Globus project team in the existing agreements and to expand the technology proposed on the basis of data transmission grid agreement GridFTP. GridFTP provides a grid environment in general, safe and effective transmission and data access agreements, it is the standard FTP protocol expansion. GridFTP transmission mechanism in the wide-area network to ensure that the environment and reliable transmission of data.GirdFTP to support third-party data transmission and control; support parallel data transmission; the use of multiple TCP flow polymerization access bandwidth to support data transmission access strip polymerization bandwidth; segmentation data stored in multiple data transmission on the same server to support multi-scale file transfers; the ability to measure levels of the data by resampling after transmission of the file transfer support and bi-directional data transfer; support reliable data transmission;seized in the course of transmission wrong and error correction.