• Proceedings of the Korean Information Science Society Conference
• /
• 2002.04a
• /
• pp.637-639
• /
• 2002

인터넷의 보편화와 컴퓨팅 기술의 다양화에 따라 점차 고가용성 서버에 대한 관심이 높아지면서 낮은 비용과 높은 성능을 만족시켜줄 수 있는 리눅스를 기반으로 한 클러스터 서버가 인기를 끌고 있다. 하지만 클러스터 서버의 높은 성능에 비해, 여러 노드를 통합하여 효율적으로 관리 및 모니터링 할 수 있는 시스템은 상대적으로 부족한 상태이다. 하지만 이 논문에서는 기존의 모니터링 시스템의 문제점을 분석하고 이들 해결할 수 있는 새로운 모니터링 시스템을 설계하고자 한다.

• 한국전산유체공학회:학술대회논문집
• /
• 2006.05a
• /
• pp.121-125
• /
• 2006

CFD has been used in aircraft development and broaden its influence in various fields of industries. This paper briefly introduces the historical trends of computing system, the overview of CFD applications in Korean Supersonic Trainer Development Program and the demand for CFD software in industry points of view.

• Proceedings of the Korean Information Science Society Conference
• /
• 2002.04b
• /
• pp.37-39
• /
• 2002

본 논문은 SAN(storage area network)강에 네트워크-부착형 (network-attached) 저장 장치들을 직접 연결하여 화일 서버 없이 직접 데이터 전송이 가능한 SAN 기반의 리눅스 클러스터 공유 화일 시스템인 SANique$^{TM}$의 오류 탐지 기법 및 회복 기법에 대하여 기술한다. 클러스터 내의 노드 오류에 의해 발생하는 "split-brain"오류 상황 및 문제점을 공유 화일 시스템 환경 하에서 성의하고, 이 문제를 해결할 수 있는 오류 탐지기법을 제시한다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2004.05a
• /
• pp.907-910
• /
• 2004

컴퓨터와 네트워크의 성능이 나날이 발전해감에 따라, 여러 대의 컴퓨팅 자원들을 통합하여 하나의 시스템처럼 사용하고자 하는 클러스터에 관한 연구가 활발히 진행되고 있다. 본 논문에서는 리눅스 기반의 컴퓨터 자원들을 하나의 클러스터로 구성하여 컴퓨팅 파워의 성능을 평가 하였다. 향후 대규모 그리드 환경에서의 효과적인 성능평가 수행을 위한 방법을 제시 하였다.

• Atmosphere
• /
• v.15 no.1
• /
• pp.35-46
• /
• 2005

Today, the outreach of National Meteorological Service such as PC cluster based Numerical Weather Prediction (NWP) technique is vigorous in the world wide. In this regard, WMO (World Meteorological Organization) asked KMA (Korea Meteorological Administration) to formulate a regional project, which cover most of RA II members, using similar technical system with KMA's. In that sense, Meteorological Research Institute (METRI) in KMA developed Mongolian NWP System (MNWPS) based on PC cluster and transferred the technology to Weather Service Center in Mongolia. The hybrid parallel algorithm and channel bonding technique were adopted to cut cost and showed 41% faster performance than single MPI (Message Passing Interface) approach. The cluster technique of Beowulf type was also adopted for convenient management and saving resources. The Linux based free operating system provide very cost effective solution for operating multi-nodes. Additionally, the GNU software provide many tools, utilities and applications for construction and management of a cluster. A flash flood event happened in Mongolia (2 September 2003) was selected for test run, and MNWPS successfully simulated the event with initial and boundary condition from Global Data Assimilation and Prediction System (GDAPS) of KMA. Now, the cluster based NWP System in Mongolia has been operated for local prediction around the region and provided various auxiliary charts.

• Proceedings of the Korean Information Science Society Conference
• /
• 2002.04a
• /
• pp.652-654
• /
• 2002

최근 리눅스 클러스터 시스템의 활용 범위가 커지면서 멀티미디어 서비스를 제공하려는 시도가 나타났다. 리눅스 클러스터 시스템 상에서 효과적으로 멀티미디어 서비스를 제공하려면 적합한 파일 시스템의 도움이 필수적이다. 즉, 클러스터 파일 시스템을 통하여 응용 프로그램에 대한 단일 입출력공간을 제공하고 효율적인 파일/디렉토리 연산을 제공하는 기술이 중요하다. 본 논문에서는 리눅스 클러스터 시스템을 위한 클러스터 파일 시스템(Cluster File System, 이하 CFS로 표기)을 설계 및 구현한다. CFS는 리눅스 파일 시스템 위에 사용자 수준에서 구현된 시스템으로 사용자에게는 단일 시스템 이미지를 제공한다. 내부적으로는 대용량의 파일이 분산되어 저장되며 이를 위해 파일/디렉토리 정보도 각각의 노드에서 분산 관리된다. 사용자에게는 응용 프로그램의 개발이 용이하도록 API가 제공되며, 또한 CFS를 관리하기 위한 도구들이 제공된다.

• 한국전산유체공학회:학술대회논문집
• /
• 2001.05a
• /
• pp.161-169
• /
• 2001

At the end of 1999, the TeraCluster Project in the KISTI Supercomputing Center was initiated to explore the possibility of PC clusters as a scientific computing platform to replace the Cray T3E system in KISTI by 2002. Since actual performance of a computing system varies significantly for different architectures, representative in-house codes from major application fields were executed to evaluate the actual performance of systems with different combination of CPU, network and network topology. As an example of practical CFD(Computational Fluid Dynamics) simulations, the flow past the Onera-M6 wing and the flow past a infinite wing were simulated on a clusters of Linux and several other hardware environments.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.14 no.2
• /
• pp.415-420
• /
• 2010

This paper describes the design overview of shared file system $SANique^{TM}$ and analyzes the performance evaluation results of I/O intensive stress test based on various cluster file system architectures. Especially, we illustrate the performance analysis for the comparison results between the $SANique^{TM}$ and the Linux file system EXT3 system that is used to generally in Unix world. In order to perform our evaluation, Oracle 10g database system is operated on the top of cluster file system, and we developed the various kinds of testing tools which are compiled by ESQL/C from Oracle. Three types of architectures are used in this performance evaluation. Those are the cluster file system $SANique^{TM}$, EXT3 and the combined architecture of $SANique^{TM}$ and EXT3. In this paper, we present that the results of $SANique^{TM}$ outperforms other cluster file systems in the overhead for providing the true sharing over the connecting server nodes.

• Journal of the Korea Society of Computer and Information
• /
• v.11 no.6 s.44
• /
• pp.69-78
• /
• 2006

In the field of the bioinformatics, it plays an important role in predicting functional information or structure information to search similar sequence in biological DB. Biolrgical sequences have been increased dramatically since Human Genome Project. At this point, because the searching speed for the similar sequence is highly regarded as the important factor for predicting function or structure, the SMP(Sysmmetric Multi-Processors) computer or cluster is being used in order to improve the performance of searching time. As the method to improve the searching time of BLAST(Basic Local Alighment Search Tool) being used for the similarity sequence search, We suggest the nBLAST algorithm performing on the cluster environment in this paper. As the nBLAST uses the MPI(Message Passing Interface), the parallel library without modifying the existing BLAST source code, to distribute the query to each node and make it performed in parallel, it is possible to easily make BLAST parallel without complicated procedures such as the configuration. In addition, with the experiment performing the nBLAST in the 28 nodes of LINUX cluster, the enhanced performance according to the increase in the number of the nodes has been confirmed.

• The Journal of Society for e-Business Studies
• /
• v.9 no.1
• /
• pp.83-104
• /
• 2004

Recently, information systems that require storage and retrieval of huge amount of data are becoming used widely. Accordingly, research efforts have been made to develop Linux cluster file systems in the SAN environment in which clients themselves can manage metadata and access data directly. Also a semi-flat directory structure based on extendible hashing has been proposed to support fast retrieval of files[1]. In this research, we have designed and implemented the semi-flat extendible hash directory under the Linux system. In order to evaluate the practicality of the directory, we have also implemented the B+-tree based directory and experimented the performance. According to the performance comparisons, the extendible hash directory has the better performance at insert, delete, and search operations. On the other hand, the B+-tree directory is better at sorting files.