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1.
Security-sensitive applications that access and generate large data sets are emerging in various areas including bioinformatics
and high energy physics. Data grids provide such data-intensive applications with a large virtual storage framework with unlimited
power. However, conventional scheduling algorithms for data grids are unable to meet the security needs of data-intensive
applications. In this paper we address the problem of scheduling data-intensive jobs on data grids subject to security constraints.
Using a security- and data-aware technique, a dynamic scheduling strategy is proposed to improve quality of security for data-intensive
applications running on data grids. To incorporate security into job scheduling, we introduce a new performance metric, degree
of security deficiency, to quantitatively measure quality of security provided by a data grid. Results based on a real-world
trace confirm that the proposed scheduling strategy significantly improves security and performance over four existing scheduling
algorithms by up to 810% and 1478%, respectively.
相似文献
Xiao QinEmail: |
2.
Norman Morrison Dan Bearden Jacob G. Bundy Tim Collette Felicity Currie Matthew P. Davey Nathan S. Haigh David Hancock Oliver A. H. Jones Simone Rochfort Susanna-Assunta Sansone Dalibor Štys Quincy Teng Dawn Field Mark R. Viant 《Metabolomics : Official journal of the Metabolomic Society》2007,3(3):203-210
3.
Terry Harmer 《Cluster computing》2007,10(3):277-285
Gridcast is an R&D project investigating grid ideas and technologies in the broadcasting technical infrastructure. In this
paper I discuss the business and technical issues in building infrastructures to support broadcasters and outline the structure
of the Gridcast grid-based service oriented architecture for broadcasting playout support.
相似文献
Terry HarmerEmail: |
4.
Xiaoyun Zhu Donald Young Brian J. Watson Zhikui Wang Jerry Rolia Sharad Singhal Bret McKee Chris Hyser Daniel Gmach Robert Gardner Tom Christian Ludmila Cherkasova 《Cluster computing》2009,12(1):45-57
Recent advances in hardware and software virtualization offer unprecedented management capabilities for the mapping of virtual
resources to physical resources. It is highly desirable to further create a “service hosting abstraction” that allows application
owners to focus on service level objectives (SLOs) for their applications. This calls for a resource management solution that
achieves the SLOs for many applications in response to changing data center conditions and hides the complexity from both
application owners and data center operators. In this paper, we describe an automated capacity and workload management system
that integrates multiple resource controllers at three different scopes and time scales. Simulation and experimental results
confirm that such an integrated solution ensures efficient and effective use of data center resources while reducing service
level violations for high priority applications.
相似文献
Ludmila CherkasovaEmail: |
5.
We develop a formal framework for the optimal allocation of limited resources that includes and clarifies the interplay between
individual optimization and the resulting effects at the population level. As an example, in regard to the evolution of sexual
recombination, the paradox of the twofold cost of sex is avoided by distinguishing between the evolution of recombination
and the subsequent emergence and stability of different mating types as a result of individual optimization within a population
that benefits from recombination.
相似文献
John PepperEmail: |
6.
Gabriel Antoniu Hinde Lilia Bouziane Mathieu Jan Christian Pérez Thierry Priol 《Cluster computing》2007,10(3):265-276
Software component technologies are being accepted as an adequate solution for handling the complexity of applications. However,
existing software component models tend to be specialized to some types of resource architectures (e.g. in-process, distributed
environments, etc.) and/or do not provide a very high level of abstraction. This paper focuses on handling data sharing on operation invocations between components as a solution allowing applications to be efficiently executed on all kinds of
resources. In particular, the data sharing pattern appears in master–worker applications, when workers need to access only
a part of a large piece of data, either in read or write mode. This approach is applied to the Common Component Architecture
model. Its benefits are discussed using an image rendering application.
相似文献
Christian PérezEmail: |
7.
Autonomic resource management in virtualized data centers using fuzzy logic-based approaches 总被引:6,自引:1,他引:5
Data centers, as resource providers, are expected to deliver on performance guarantees while optimizing resource utilization
to reduce cost. Virtualization techniques provide the opportunity of consolidating multiple separately managed containers
of virtual resources on underutilized physical servers. A key challenge that comes with virtualization is the simultaneous
on-demand provisioning of shared physical resources to virtual containers and the management of their capacities to meet service-quality
targets at the least cost. This paper proposes a two-level resource management system to dynamically allocate resources to
individual virtual containers. It uses local controllers at the virtual-container level and a global controller at the resource-pool
level. An important advantage of this two-level control architecture is that it allows independent controller designs for
separately optimizing the performance of applications and the use of resources. Autonomic resource allocation is realized
through the interaction of the local and global controllers. A novelty of the local controller designs is their use of fuzzy
logic-based approaches to efficiently and robustly deal with the complexity and uncertainties of dynamically changing workloads
and resource usage. The global controller determines the resource allocation based on a proposed profit model, with the goal
of maximizing the total profit of the data center. Experimental results obtained through a prototype implementation demonstrate
that, for the scenarios under consideration, the proposed resource management system can significantly reduce resource consumption
while still achieving application performance targets.
相似文献
Mazin YousifEmail: |
8.
9.
10.
In the Indian state of Goa, communally owned agricultural land has persisted through indigenous state rule, colonial occupation
and postcolonial liberation. We show that in Goa, and indeed elsewhere in the world, communally owned land provides protection
against scarcity, risk, and state revenue demands in wet rice agriculture. When wet rice agriculture is the primary agricultural
activity, communally owned land is an effective way to utilize resources. These findings add to the literature that challenges
the inevitability of the tragedy of commonly owned resources.
相似文献
Paul AxelrodEmail: |
11.
12.
Roger Sansom 《Biology & philosophy》2008,23(4):475-491
I show that gene regulation networks are qualitatively consistent and therefore sufficiently similar to linearly seperable
connectionist networks to warrant that the connectionist framework be applied to gene regulation. On this view, natural selection
designs gene regulation networks to overcome the difficulty of development. I offer some general lessons about their evolvability
that can be learned by examining the generic features of connectionist networks.
相似文献
Roger SansomEmail: |
13.
Sub-Antarctic Marion Island has had a permanent research station for 50 years and the islands Wandering Albatrosses have been intensively studied for 20 years. The reactions of breeding birds to approaches by a human on foot were recorded. Three response variables were calculated: intensity of vocal reaction (IVR), intensity of non-vocal reaction (INR) and overall response index (ORI). At 5 m from the nest, twice as many birds stood and/or vocalised as at 15 m. Nearest neighbour distance, age and gender did not explain individual variability of responses. Study colony birds had higher IVR scores than non-study colony birds; birds at colonies closest to the station had the highest ORI scores. A better breeding record was associated with lower IVR and ORI scores, but a causative relationship remains to be demonstrated. A minimum viewing distance of 25 m is recommended for breeding Wandering Albatrosses.
相似文献
Marienne S. de VilliersEmail: Fax: +27-21-6503434 |
John CooperEmail: |
Peter G. RyanEmail: |
14.
Andres Quiroz Nathan Gnanasambandam Manish Parashar Naveen Sharma 《Cluster computing》2009,12(1):73-85
We present a decentralized algorithm for online clustering analysis used for anomaly detection in self-monitoring distributed
systems. In particular, we demonstrate the monitoring of a network of printing devices that can perform the analysis without
the use of external computing resources (i.e. in-network analysis). We also show how to ensure the robustness of the algorithm,
in terms of anomaly detection accuracy, in the face of failures of the network infrastructure on which the algorithm runs.
Further, we evaluate the tradeoff in terms of overhead necessary for ensuring this robustness and present a method to reduce
this overhead while maintaining the detection accuracy of the algorithm.
相似文献
Naveen SharmaEmail: |
15.
16.
The analysis of data usage in a large set of real traces from a high-energy physics collaboration revealed the existence of
an emergent grouping of files that we coined “filecules”. This paper presents the benefits of using this file grouping for
prestaging data and compares it with previously proposed file grouping techniques along a range of performance metrics. Our
experiments with real workloads demonstrate that filecule grouping is a reliable and useful abstraction for data management
in science Grids; that preserving time locality for data prestaging is highly recommended; that job reordering with respect
to data availability has significant impact on throughput; and finally, that a relatively short history of traces is a good
predictor for filecule grouping. Our experimental results provide lessons for workload modeling and suggest design guidelines
for data management in data-intensive resource-sharing environments.
相似文献
Gabriele GarzoglioEmail: |
17.
Douglas Medin Norbert Ross Douglas Cox Scott Atran 《Human ecology: an interdisciplinary journal》2007,35(3):315-329
There is a continuing controversy over Native American fishing and hunting rights. We show that Native American (Menominee)
and European American fish experts have a common knowledge base and share values and attitudes associated with fishing practices
(though organized around different ethical principles). Nonetheless, perceived group differences are dramatic (especially European American perceptions of Native Americans). Cultural differences in models
of nature and associated inference processes appear to mediate these stereotypes and may hold the key to reducing intergroup
conflict over resources.
相似文献
Douglas MedinEmail: |
18.
19.
Peter Godfrey-Smith 《Biology & philosophy》2007,22(3):429-437
Jablonka and Lamb's claim that evolutionary biology is undergoing a ‘revolution’ is queried. But the very concept of revolutionary
change has uncertain application to a field organized in the manner of contemporary biology. The explanatory primacy of sequence
properties is also discussed.
相似文献
Peter Godfrey-SmithEmail: |
20.
The recent contribution by Jarmila Kukalová-Peck on Hennigian phylogenetics and hexapod limb evolution is critically evaluated.
相似文献
Michael S. Engel (Corresponding author)Email: |