Cluster Technology And Grid Technology In Satellite Data Visualization System

With the collaboration between National Satellite Meteorological Center and East China Normal University, the phase 1 of FY3 Satellite Data Visualization System Project has succefully completed. As the major achievement of phase 1, a demo system has been developed to implement most of the functions of FY3 Satellite Data Visualization System. In phase 2, the main objective of the project has turned to the improvement of the data processing capacity and network throughput. In order to do that, this essay analyses and compares a variety of potential solutions. As a result, cluster technology (solution) and grid technology (solution) have been choosen to achieve this goal.This essay preliminarily studys and implements cluster technology (solution) and grid technology (solution). During the implementation, key technologies and difficulties have been solved based on the features of satellite system. Specifically, cluster solution is a combination of Apache HTTP Server and Apache Tomcat, which is the most widely-used open souce cluster solution. During the reflaction of cache module, Sticky Session has been picked to avoid distributed cache. In the grid solution, due to the development situation of grid technology and high demand for high performance, this essay has not chosen any of the existing grid solutions. Instead, an autonomous architecture has been built, which particularly targets at Satellite Data Visualization System. Within this architecture, a lot of aspects have been taken into consideration, such as load monitoring, job dispatching, data management, security authentication, etc. Finally, this essay utilizes available resources and new techniques as wireless network to simulate testing environment and performe performance tests for the system. Test results prove the feasibility and effectiveness of cluster solution and grid solution.Although the solutions in this essay target at Satellite Data Visualization System, it can be refered by other J2EE based web applications that require high performance.