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Overview and evaluation of conceptual strategies for accessing CPU-dependent execution resources in grid infrastructures

Walsh J., Dukes J., Pierantoni G., Coghlan B.

Computer Science

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2015

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Vol. 16 (4)

373--393

EN

The emergence of many-core and massively-parallel computational accelerators (e.g., GPGPUs) has led to user demand for such resources in grid infrastructures. A widely adopted approach for discovering and accessing such resources has, however, yet to emerge. GPGPUs are an example of a larger class of computational resources, characterized in part by dependence on an allocated CPU. This paper terms such resources “CPU-Dependent Execution Resources” (CDERs). Five conceptual strategies for discovering and accessing CDERs are described and evaluated against key criteria, and all five strategies are compliant with GLUE 1.3, GLUE 2.0, or both. From this evaluation, two of the presented strategies clearly emerge as providing the greatest flexibility for publishing both static and dynamic CDER information and identifying CDERs that satisfy specific job requirements. Furthermore, a two-phase approach to job-submission is proposed for those jobs requiring access to CDERs. The approach is compatible with existing grid services. Examples are provided to illustrate job submission under each strategy.

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On Distributed Data Processing in Data Grid Architecture for a Virtual Repository

Kuliberda K., Wiślicki J., Kowalski T. M., Adamus R., Kaczmarski K., Subieta K.

Journal of Applied Computer Science

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2010

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Vol. 18, nr 2

25-55

EN

The article describes the problem of integration of distributed, heterogeneous and fragmented collections of data with application of the virtual repository and the data grid concept. The technology involves: wrappers enveloping external resources, a virtual network (based on the peer-topeer technology) responsible for integration of data into one global schema and a distributed index for speeding-up data retrieval. Authors present a method for obtaining data from heterogeneously structured external databases and then a procedure of integration the data to one, commonly available, global schema. The core of the described solution is based on the Stack-Based Query Language (SBQL) and virtual updatable SBQL views. The system transport and indexing layer is based on the P2P architecture.

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Improved grid integration of wind energy systems

Schulz D.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2009

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Vol. 57, nr 4

311-315

EN

The contribution describes the German situation of grid integration of wind energy. Due to a new edition of the renewable energy law some technical requirements must be fulfilled by the wind turbines. These demands and the possibilities and efforts of the technical realization are described based on the existing technology. Then the necessary steps towards an increased power share of wind energy are introduced. This includes the energy storage in power systems and the retrofit of the existing transmission system.