Regional Global e-Science Networking To Create Science & Technology R&D Hub
Regional Global e-Science Networking To Create Science & Technology R&D Hub
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  • 승인 2005.09.01 12:01
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Constructing a long-term e-Science research environment The transformation of the computer industry field brought about rapid development of many application research realms carrying out numerical analysis. Computational fluid dynamics also belongs to one of the representative fields benefiting from quick advances in computing hardware, has enormously increased analysis scale thanks to the huge progress in computer technology.
Simultaneously more efficient researches could be carried out with various types of algorithm necessary for applying current hardware being developed. Specially, the development of the computer hardware field giving rise to big changes in computational fluid dynamics aspects may be said to give rise to parallel computers, through which the volume of problems analyzed in computational fluid dynamics has increased by several-fold, having developed all sorts of numerical techniques for efficient parallelization, at the same time. But, in spite of such parallel-computing methods being presented, large-scale problems . aircraft integration design, all analyses covering launch vehicles' flight and their mission fulfillment, fluid structure and correlation analysis of huge-sized edifices, etc -- difficult to be analyzed only by parallel computers within single organization actually -- still remains. Accordingly, effective numerical analysis researches through Grid technology, which shares research resources distributed in wide areas by connecting them with highspeed access network, are being found more commonly nowadays. As a part of these researches, the project to develop a science & technology R&D hub in Northeast Asia through international e- Science collaboration belongs to them, managed by KISTI and financially supported by the Ministry of Science & Technology. A summary of this research project will be explained next. This research project aims at presenting and conducting experiments on a method that will systematically and innovatively improve the joint research environment for the researches in the Northeast Asian countries, and building up an online virtual science community environment utilizing the constructed e-Science infrastructure. Besides these goals, it aims at promoting Korea to take the lead in e- Science research through intimate cooperation activities of the researchers among Korea, China, and Japan. Through this research project, an exemplary e-Science test bed model, which will enable regularly linked interface among cluster computers distributed over three countries of Korea, China, and Japan, will be constructed. For its construction, technologies of computer information provision, single-sign-on, and communication with non-compatible computers will be studied. Stability test of fuel tanks separated from aircraft will be also carried out as a model application study using the constructed e-Science test bed, based on highthroughput computing method. All studies will be performed utilizing the computers in Korea, China, and Japan at the same time, dependent on the computational fluid dynamics. In addition, technology of constructing web-based service environment will be studied to support Korean, Chinese, and Japanese researchers to share the research methods and results. Off-line cooperative e-Science activities will be performed for Korea to take the lead in cooperation researches in Northeast Asia. For realizing a computational environment based on e-Science linking computational resources in three countries .including Korea, China, and Japan, through linking Japanese and Chinese organizations, KISTI's Venus clusters and Konkuk University's new clusters with K* Grid technology will be prepared to be linked, after required authorizations necessary for accessing to the resources of each organization are acquired. For this progress, our exclusive access authorization to some parts of resources will be prepared to be acquired by discussions among researchers chiefly responsible for collaborative research in related organizations: KISTI (Korea), AIST (Japan), and CAS (China). Authorization to use Grid technology based on Grid CA (Certificate Authority) will be required. Tests that apply each organization's resources will be carried out. Cactus numerical analysis applying 20 CPUs of AIST (Japan) and 10 CPUs of CAS (China) will be performed. 1,000 CPUs of Korea, China, and Japan will be scheduled to be ultimately linked. Cactus, a type of middleware, is opensource designed and developed for computing scientists and engineers, and presents research environment that multiple researchers can collaboratively use for their studies, irrespective of their different programming languages. Cactus provides an integration environment in which analysis programs on fluid dynamics made by independent users, check-pointing tool, parallel input/output tool, visualization tool, etc can be run in one integrated form. In addition, Cactus can be applied not only in a single-platform system, but also in multiple platforms such as clusters, or super computers, and also provides an interface environment with tools now being used by application program users that can be easily connected for their uses. For the example, Gloubs Toolkits, HDF5 parallel file I/O, PETSc science library, visualization tool, etc belong to such tools. Finally, standard toolkits of computing parallel process, input & output, data segmentation, and so forth are provided and practical computing codes necessary for carrying out numerical analyses on applied science such as computational fluid or astrophysics can be developed in thorn type by Cactus Grid-One portal service already embodied through this research project was designed for helping researchers or general users who have little experience in computer systems or networking to freely and easily access and use Grid-based environment, supercomputers, and clustering computer systems. Because some knowledge and experiences of related fields have been needed to apply these developed computer environment interface until now, users or researchers occupied in science or engineering have spent much time practicing related technology required to use the system, apart from their own responsibilities or duties. Meanwhile, this fact gave rise to much inefficiency. Therefore, the main purpose of this portal site is to let general users easily access and use a Grid-based environment, supercomputer, and clustering computer system. Task Migration Process The currently developed application program is its initial version, and it is structured with enabling one to execute and test parallel programs written by independent users, getting the tested results. Simultaneously, it was built up to manage and control all of such processes within this portal site. The findings carried out through this research until now can be summarized as follows: To begin with, as part of the expansion and application of a Grid-based environment already embodied in local and foreign countries in order to construct a long-term e-Science research environment, KCJ e-Science test-bed linking research resources in Korea, China and Japan was already constructed, and so a mutual linking system can now be said to be accessible. Many research results like these will be used as exemplary models to build up an e-Science research environment in Northeast Asia from now on. In addition, it is expected to offer another opportunity for Korea's superiority of research infrastructure to be showcased to foreign countries through increased research volume benefiting from incessant researches over the coming years.

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