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Grid is a perfect environment for the large scale Parallel Discrete Event Simulation (PDES), because its distribution and collaboration features match the PDES applications well. The PDES tasks or applications are modeled as a Directed Acyclic Graph (DAG), in which the simulation resources consist of three critical factors, simulation hosting machine (SHM), simulation service (SS) and simulation data...
To solve the problem that single computer simulation is inefficient with the limitation of resource, a distributed EASY5 simulation method based on the grid is provided. Easy5 is schematic-based simulation software which supports multiple dynamic systems simulation. In this paper, based on SOA (Service Oriented Architecture), the components of Easy5 are abstracted as services and published in grid...
This paper is presented based on paper and recent fruits gained by authors. The research background of a service oriented infrastructure for networkitized M&S, namely simulation grid, is firstly concisely introduced, then combined with authors' recent research on virtualization technology being applied to simulation grid, the phased research achievements of simulation grid are introduced in detail,...
This paper mainly focuses on solution to QoS provision in power grid analysis system (PGAS) which is an improvement for the electric power information system. The solution consists of two parts. The first part is the grid QoS provision model for PGAS based on metaservices and CCM. The model is proposed based on requirement of data-intensive QoS guaranteed grid systems. The second part is an adaptive...
The virtualization technology is helpful to support grid QoS. A manual configuration method and an automatic configuration method are designed to build the virtual workspace environment based on virtualization technology. Both the MetaServices and the automatic configuration software are employed to establish the virtual workspace environment. For dynamic jobs, the corresponding dynamic makespan optimized...
Although some relatively mature products and systems about Dynamic service composition are proposed, their manipulations are mostly not trivial and intuitive for the common users. Therefore, this paper proposes a dataflow driven dynamic service composition architecture aiming at astronomy applications, to simplify the requirements for users to compose a service. The architecture utilizes Dataflow...
Based on the research of SLA, SNAP, MetaService and contractual computing service, a service level QoS mechanism and algorithm for astronomy data distribution and backup in grid environment is proposed. A weight based comparison method for different data services provided by data servers is described first. The method can choose suitable data servers under the requirements of consumers. Based on the...
The combination of parallel/distributed discrete event simulation (PDES) and Grid technology is a new trend in simulation. QoS is important yet difficult in this process. With the special features of Gird architecture and PDES input, such as periodical and predictable inputs, we could enhance QoS with a PDES-specific prediction. A Grid-based framework is presented that is designed to help predict...
In order to deal with telescope data more systematically and flexibly, this paper proposes a grid middleware pipeline system PMGrid based on service-oriented architecture (SOA) for efficient telescope data processing. This system allows users to dynamically compose data process application as a pipeline virtual service (PVS) using existing services for their special purposes. Furthermore, the configured...
A user satisfaction level model, which focuses on the real feeling of grid users, is proposed in this paper. The model can integrate not only multiple-aspect demands of different grid users, but also their preferences in different aspects. An abstract user satisfaction level function and its properties are also defined in the model. Based on the model, an effective grid task scheduling algorithm Sat...
This paper presents a mechanism that automatically build evaluation metadata for grid services by using the information from the execution of different applications. A new MetaService AMDBS, automatic metadata building service, is designed to support this mechanism. The typical feature of this mechanism is that it can get not only the absolute evaluation information, but also the relative global ranking...
This paper focuses on architecture suitable for large-scale simulation system. Based on the scenario of large-scale Internet simulation, the grid technology is introduced and a new architecture, GDSA is proposed. GDSA, a full grid-based architecture mainly focuses on four pending problems in distributed system: scalability, communications, management mechanism and QoS insurance computing environment...
The rise of extensive computing has spawned an urgent need of information integration and collaboration. In this paper, we present a Grid Statistics Service (GlobalStat), a utility Grid service designed to provide an easy, safe, scalable and stable solution to integrate diverse data and get a global Grid view by statistics methodology. The GlobalStat between Grid nodes is organized in "semi-P2P"...
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