• Proceedings of the Korean Information Science Society Conference
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• 한국정보과학회 2005년도 가을 학술발표논문집 Vol.32 No.2 (1)
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• pp.1015-1017
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• 2005

본 논문에서는 웹기반의 그리드 컴퓨팅 환경에서 시스템을 모델링하고 스케줄링 기법을 시뮬레이션 할 수 있는 그리드 스케줄링 플랫폼을 설계하고 구현하였다. 구현한 웹기반 그리드 스케줄링 플랫폼은 자바 환경의 그리드 스케줄링 툴킷인 GridSim을 시뮬레이션 도구로 활용하였으며, 자원 모델링, 작업 모델링, 알고리즘 컴파일, 시뮬레이션을 웹 환경에서 빠르게 수행할 수 있다. 구축한 스케줄링 플랫폼은 향후 그리드 연구에 기반구조로 활용될 수 있으며 스케줄링 기법의 성능 분석을 위한 도구로 사용될 수 있다.

• The KIPS Transactions:PartA
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• 제13A권5호
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• pp.381-386
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• 2006

In this paper, we designed and implemented a web-based grid scheduling platform(WGridSP), which can model a system and simulate scheduling scheme in grid computing. WGridSP used GridSim, a grid scheduling toolkit in java-environment, as a tool for simulation and is able to Perform resource modeling, task modeling, algorithm compiling, simulation, and Performance evaluation rapidly in web environment. WGridSP can be applied as a foundation for grid research and can be used to analyze the efficiency of scheduling algorithm.

• Journal of the Korea Society for Simulation
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• 제15권4호
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• pp.129-136
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• 2006

Grid computing has been appeared for solving large-scaled data which are not solved by a single computer. Grid computing is a new generation platform which connects geographically distributed heterogeneous resources. However, gathering heterogeneous distributed resources produces many difficult problems. Especially. to assure resource reliability is one of the most critical problems. So, we propose a grid resource scheduling model using grid resource reliability measurement. We evaluate resource reliability based on resource status data and apply it to the grid scheduling model in DEVSJAVA modeling and simulation. This paper evaluates parameters such as resource utilization, job loss and average turn-around time and estimates experiment results of our model in comparison with those of existing scheduling models such as a random scheduling model and a round-robin scheduling model. These experiment results showed that the resource reliability measurement scheduling model provides efficient resource allocation and stable Job processing in comparison with a random scheduling model and a round-robin scheduling model.

• Journal of the Korea Society of Computer and Information
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• 제11권5호
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• pp.87-94
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• 2006

Grid computing has been developed for resolving large-scaled computing problems through geographically distributed heterogeneous resources. In order to guarantee effective and reliable job processing, grid computing needs resource scheduling model. So, we propose a resource performance measurement scheduling model which allocates job to resources with resource performance measurement. We assess resources using resource performance measurement formula, and implement the resource performance measurement scheduling model in DEVS simulation modeling.

• Proceedings of the Korean Information Science Society Conference
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• 한국정보과학회 2006년도 한국컴퓨터종합학술대회 논문집 Vol.33 No.1 (A)
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• pp.418-420
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• 2006

본 논문에서는 그리드 컴퓨팅 환경을 위한 동적 스케줄링 알고리즘을 웹 상에서 시뮬레이션 할 수 있는 그리드 스케줄링 시뮬레이션 플랫폼을 설계하고 구현하였다. 구현한 웹기반 동적 스케줄링 시뮬레이션 플랫폼은 자바 환경의 그리드 스케줄링 툴킷인 GridSim과 GridBroker를 수정하여 시뮬레이션 도구로 활용하였으며 자원 모델링, 작업 모델링, 알고리즘 컴파일을 웹 상에서 수행할 수 있다. 특히, 실시간 자원정보를 활용하는 동적 스케줄링 알고리즘을 지원함으로써 실제 그리드의 특성을 최대한 반영하였다. 구축한 플랫폼은 향후 그리드 연구에 기반구조로 활용될 수 있으며, 스케줄링 기법의 성능 분석을 위한 도구로 사용될 수 있다.

• Journal of the Korea Society of Computer and Information
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• 제12권5호
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• pp.49-56
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• 2007

This paper deals with grid job allocation and grid resource scheduling to provide a stable and quicker job processing service to grid users. In this paper, we proposed a fuzzy logic-based grid job scheduling model for an effective job scheduling in computational grid environment. The fuzzy logic-based grid job scheduling model measures resource efficiency of all grid resources by a fuzzy logic system based on diverse input parameters like CPU speed and network latency and divides resources into several groups by resource efficiency. And, the model allocates jobs to resources of a group with the highest resource efficiency. For performance evaluation, we implemented the fuzzy logic-based grid job scheduling model on the DEVS modeling and simulation environment and measured reduction rates of turnaround time, job loss, and communication messages in comparison with existing job scheduling models such as the random scheduling model and the MCT(Minimum Completion time) model. Experiment results that the proposed model is useful to improve the QoS of the grid job processing service.

• Proceedings of the Korean Information Science Society Conference
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• 한국정보과학회 2003년도 가을 학술발표논문집 Vol.30 No.2 (1)
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• pp.403-405
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• 2003

지역적으로 분산되어 있는 고성능의 컴퓨팅 자원들을 한 데 묶어 이용하는 그리드 기술이 발전함에 따라, 그리드 환경에서의 스케줄링이 절실히 필요하게 되었다. 본 논문에서는 그리드 자원 정보를 이용하여 그리드 자원을 효율적으로 이용할 수 있는 스케줄링 알고리즘에 대하여 고찰해보고, 자원의 성능을 고려한 스케줄링 알고리즘을 설계하여 실험하였다. 이러한 실험을 위하여 그리드 환경을 시뮬레이션 하였으며, 이 결과를 다른 알고리즘과 비교하였다.

• The Journal of Korean Association of Computer Education
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• 제9권6호
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• pp.89-98
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• 2006

Recently, grid computing environment has being changed to the service-oriented grid integrated with Web Services. In this architecture, there is the service-oriented grid application in which Grid Services are executed according to the workflow of the grid application. This implies that the grid scheduling method needs to consider grid service characteristics. Therefore, we propose the grid service performance model based on factors such as service availability, accessibility, reliability, throughput, and slowdown, and develop service scheduling method to increase performance of the service-oriented grid application.

• The Journal of Korean Association of Computer Education
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• 제10권3호
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• pp.49-56
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• 2007

Grid provides a platform for the efficient execution of large-scale computing in science and engineering. In this environment, resource management and task scheduling are complex undertaking. We designed and implemented a web-based scheduling toolkit(GridTool), which can model a system and simulate scheduling scheme in Grid computing. The GridTool used GridSim, a toolkit in java-environment, as a tool for simulation. The GridTool is able to perform resource modeling, task modeling, algorithm compiling, simulation, and performance evaluation efficiently in web environment. The GridTool can be applied as a platform for Grid research and can be used to analyze the efficiency of scheduling algorithm.

• Journal of KIISE:Computer Systems and Theory
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• 제32권11_12호
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• pp.639-645
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• 2005

GRID environments have been developed in distributed heterogeneous computing infrastructure for advanced science and engineering Therefore efficient scheduling algorithms for allocating user job to resources in the GRID environment are required. Many scheduling algorithms have been proposed, but these algorithms are not suitable for the GRID environment. That is the previous scheduling algorithm does not consider network bandwidth between multiple resources. In this paper, we propose a new scheduling algorithm for Global GRID environment and show that our algorithm has better performance than other scheduling algorithms through extensive simulation.