Load Balancing Research Based-on Data Migration In Computational Grid

Computational grid appears as advanced computer network technology and advanced computing architecture and also an integrated framework of computer hardware and software. From the viewpoint of hardware computational grid are consist of all kinds of high performance computing resources such as remote giant computer and also include network resources, storage equipment, all sorts of science apparatus, visual and virtual reality display equipment and so on, even though personal computers. From the viewpoint of software it is a middleware. It integrated all kinds of resources mentioned above and make them become a "one" independent computer resource that is on the user's table and it is so powerful that it can solve nearly all kinds of problems, which can not be settled by the methods and resources used today. Users can use these resources transparently and seamlessly. Besides that these users are not limited by geographical boundary. By computational grid, it is possible that we can use a newly applications ways and means based on computing and not localized to the mode of Client/Server. We can predict that grid computing will dominant high performance computing ultimately just like applications development of information oriented was supported by WWW technologies.The main function of computational grid system is provides an environment of transparent, distributed, share, secure and fault-tolerant for grid users. These users in the environment can share resources such as computing resources, network resources, datum resources, expensive equipments and so forth. How and when and where a program can be done not be decided by user but by computational grid system itself. On the other hand all the users are in the same virtual environment so they can do coordinate work realizing even though they are in the different pleases and spans different subjects. On the other hand there are high applications performance in the grid computing for the reason that programs can exercise concurrently and resources off the line can be used. A simple programming environment and model also can be provided by grid and the results is higher programming productivity can be obtained by grid users. Task scheduling and load balancing based on data migration are the most impotent parts for the design of computational grid. In a computational grid, a scheduling sysytem is very important,a good scheduling sysytem can manage the whole processing capability that the hosts in the grid efficiently. A scheduling sysytem can decide the efficiency of the grid, especially for a task with a lot of computation, a good scheduling sysytem can provide a high executing speed and reduce the executing time of the task.. Task scheduling and load balancing based on data migration are researched in this paper, The research work is benefit to further researches for task scheduling and load balancing technology of computational grid.