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Grid computing provides high performance like a super computer through sharing and using distributed heterogeneous computing resources. Grid computing processing time and cost are widely varied since a grid user or a grid middleware can select a variety of distributed heterogeneous resources. Therefore, grid computing absolutely needs a grid resource management method and model. In this paper, we propose two types of resource management model with resource reliability. The first model is the idle resource supplement model. The point of the idle resource supplement model is that adds to idle resources when existing resources can not process jobs. The second model is the validity time designation model which considers grid users. This model processes jobs during validity time that is decided by grid users. This paper evaluates system performance such as utilization, job-loss rate and average turn-around time. And, we estimate experiment results of our models in comparison with those of existing models such as a random model and a round-robin model. The experiment results demonstrate that the two models based on resource reliability measurement improve resource utilization and provide reliable job processing. And, we expect that our proposed models improve grid computing QoS. [ABSTRACT FROM AUTHOR]

Importance and need of grid process scheduling have been increased in accordance with development of grid computing. In order to distribute and utilize grid processors efficiently, grid computing system needs scheduling policies that manage and schedule grid process. This paper reviews current scheduling policies and proposes an efficient scheduling model which is called the predictive process scheduling model. For efficient scheduling, this paper presents the processing time prediction algorithm to resolve problems of grid scheduling. The predictive process scheduling model predicts processing times of processors, allocates a job to a processor with minimum processing time, and minimizes overall system execution times. For performance evaluation, this paper measures turn-around time, job loss, throughput, and utilization. Empirical results show that the predictive process scheduling model operates with the less 69.5% of turn-around time and the less 76.4% of job loss and improves the more 119.6 % of throughput and the more 117.8% of utilization than those of existing scheduling models such as random scheduling and round-robin scheduling. [ABSTRACT FROM AUTHOR]

Complex and large-scale distributed systems are characterized by numerous interactive data communication among distributed components over network. This paper proposes a communication data multiplexing approach as an efficient message traffic reduction scheme. This approach encodes joint outputs of sender components into a single message and applies to a distributed system involving components moving and interacting in multi-dimensional space. For performance evaluation, this paper applies uses a projectile/missile case study with realistic multi-dimensional dynamics. This paper investigates variation of system accuracy and network bandwidth requirement, while a ratio of active components and a time granule are varied. Analytical and empirical data clearly indicate the advantages of multiplexing in saving communication resources in a large-scale distributed simulation. In addition, this paper discusses effectiveness and limitation of the multiplexing approach while considering the tradeoff between system accuracy and performance. [ABSTRACT FROM AUTHOR]

This paper presents a modeling of a distributed simulation system with a data management scheme. The scheme focuses on a distributed simulation concept, which is load balancing, suggests distribution of a different functionality to each distributed component, and assigns various degrees of communication and computation loads in each component. In addition, this paper introduces a design with an inter-federation communication on HLA-compliant distributed simulation. The design focuses on integration among multiple federations and constructs the larger distributed simulation system by suggesting a HLA bridge connection. The integration supports system simulation flexibility and scalability. This paper discusses design issues of a practical system with a HLA bridge for inter-federation communication. This paper analyzes and evaluates performance and scalability of the data management scheme with load balancing on distributed simulation, especially with inter-federation and inside-federation communication configurations. The analytical and empirical results on a heterogeneous OS distributed simulation show improvement of system performance and scalability by using data management and inter-federation communication. [ABSTRACT FROM AUTHOR]

Grid computing is the next generation platform that maximizes computing performance of system as using numerous computing resources on computer networks. Grid computing not only shares computing resources but also efficiently utilizes available computing resources. Therefore, grid computing needs resource management policies that handle and manage grid computing resources. This paper reviews existing resource management models based on economic principles such as auction model and commodity market model. This paper proposes an efficient resource management model, which is called the grid resource trade network model, and presents its bidding algorithms for grid users and grid providers. The proposed model reduces idle resources, improves resource utilization, and provides effective resource distribution. Empirical results show usefulness and efficiency of the grid resource trade network model. [ABSTRACT FROM AUTHOR]

This paper presents a design and development of a data distribution management modeling in computational grid. The modeling focuses on system performance improvement of a satellite cluster management system which uses an inter-federation communication in HLA (High Level Architecture)-compliant grid system. The inter-federation communication allows to execute a complex large-scale cluster management system with distributed satellites and share the dispersed data assets among satellite components collaboratively. In addition, this paper discusses the data distribution management modeling with centralized and decentralized approaches to improve system performance and scalability of satellite cluster management. The analytical and empirical results on the heterogeneous OS-based computational grid show usefulness of data distribution management and inter-federation communication in the satellite cluster management system. [ABSTRACT FROM AUTHOR]

Demand of space missile simulation on distributed system is increasing to provide cost-effective, execution-effective, and reliable simulation of mission-effective missile systems. This paper presents modeling and simulation of space missile systems on distributed system and discusses kinetics of a missile on the earth and movement of attack/interceptor missiles. This paper focuses high performance simulation for space missile simulation with distributed system construction and execution concepts and provides simulation effectiveness with reasonable computation and communication resources. This paper analyzes simulation performance and scalability of space missile simulations in terms of simulation cost and sensitivity. Analytical and empirical results prove feasibility of space missile simulations on distributed system through reduction of network bandwidth requirement and transmission data bits within tolerable error. [ABSTRACT FROM AUTHOR]