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...planning. our research effort addresses the second issue, namely the query optimization of distributed database queries. hereby we consider a...a novel heuristic framework for the optimization of query execution plans (qep) on a world-wide scale. our work is based on a multi-staged blackboard mechanism...
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...for accessing and manipulating different database resources. while current challenges focus on managing database resources and ensuring the quality of data integration. this...and sla-based evaluation model. the slas of a database resource is defined by sla-based resource description model. the sla-based query model is...
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...a semantic solution for integrating database resources on the web. although many algorithms have been proposed for optimizing query-processing in order to...challenges have arisen for query optimization in database grid than traditional distributed database. following this observation, we present the design of a query optimizer in dartgrid , and a heuristic...
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...can be solved by using the grid database and leads to more efficient function. therefore, with internet extension among the organizations and institutes and also accordance of grid architecture to it, development of database in grid environments is inevitable. in order...
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...system (overlay net- work) for the discovery of grid resources. each node in the grid becomes a peer in the overlay network, which provides a...from a large-scale deployment on planetlab and discuss the pros and cons of overlay networks in the context of grids....
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...join virtual organizations. because economic
resource management mechanisms can encourage grid participants to reveal the true valuations of their jobs and resources,
the system becomes capable of making...using simulation. this paper presents the grid economics simulator (ges) in support of such research.
the key design goals of the framework are enabling a wide...
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...the effective and efficient exploitation of grid computing facilities requires advanced resource management systems to automatically and transparently ensure the fulfillment not only of functional requirements but also of non-functional ones. this paper presents a framework for brokering of grid resources, virtualized through web services, which...
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resources allocation is complex undertaking problem in distributed resources share problems. in this work, we consider the problem of engineering agents that...simulation environment is established and the simulation experiments indicate that the algorithm meet the requirements of user's qos better than the conventional algorithms....
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...we consider the problem of blasting a genome against a database of dna sequences to see whether the genome has subsequences in common...width is no more than the size of the bin. the goal is to minimize the total size of the bins used for packing the entire rectangle....