Cost-Performance Driven Resource Configuration for Database Applications in IaaS Cloud Environments

2012 ◽  
pp. 111-129 ◽  
Author(s):  
Shoubin Kong ◽  
Yuanping Li ◽  
Ling Feng
Keyword(s):  
Database Applications ◽  
Cost Performance ◽  
Resource Configuration ◽  
Cloud Environments

A Virtual Resource Pricing Mechanism Based on Three-Side Gaming Model in Large-Scale Cloud Environments

2020 ◽  
Vol 16 (3) ◽  
pp. 17-32
Author(s):  
Peng Xiao
Keyword(s):  
Large Scale ◽  
Network Virtualization ◽  
Virtual Networks ◽  
Challenging Problem ◽  
Resource Configuration ◽  
Pricing Mechanism ◽  
User Costs ◽  
Virtualization Technology ◽  
Cloud Environments ◽  
Resource Allocation Efficiency

Recently, network virtualization technology has become a promising approach to efficiently share physical substrate networks in a cloud. However, finding an appropriate mapping between nodes and links in virtual networks is still a challenging problem. To overcome the demerits of existing price mechanisms, the author presents a game-based pricing model, in which resource configuration and provision among virtual networks is defined as a two-phrase gaming model. In this gaming model, a cooperative gaming model is applied to optimize resource benefits, while a non-cooperative gaming model is used to balance user costs and provider benefits. Extensive experiments are conducted in a real-world cloud, and the results show that this pricing mechanism can effectively improve the resource allocation efficiency as well as the resource profits of cloud providers. In addition, it also exhibits better robustness than many existing methods when a cloud system is facing intensive workloads.

A Local Area Network for Medical Research; Planning, Realization and Experience

1991 ◽  
Vol 30 (01) ◽  
pp. 53-64 ◽  
Author(s):  
R. Schosser ◽  
C. Weiss ◽  
K. Messmer
Keyword(s):  
Medical Research ◽  
Word Processing ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Test Installation ◽  
Cost Performance ◽  
The Public ◽  
On Line ◽  
The University

This report focusses on the planning and realization of an interdisciplinary local area network (LAN) for medical research at the University of Heidelberg. After a detailed requirements analysis, several networks were evaluated by means of a test installation, and a cost-performance analysis was carried out. At present, the LAN connects 45 (IBM-compatible) PCs, several heterogeneous mainframes (IBM, DEC and Siemens) and provides access to the public X.25 network and to wide-area networks for research (EARN, BITNET). The network supports application software that is frequently needed in medical research (word processing, statistics, graphics, literature databases and services, etc.). Compliance with existing “official” (e.g., IEEE 802.3) and “de facto” standards (e.g., PostScript) was considered to be extremely important for the selection of both hardware and software. Customized programs were developed to improve access control, user interface and on-line help. Wide acceptance of the LAN was achieved through extensive education and maintenance facilities, e.g., teaching courses, customized manuals and a hotline service. Since requirements of clinical routine differ substantially from medical research needs, two separate networks (with a gateway in between) are proposed as a solution to optimally satisfy the users’ demands.

Inhibiting Factors of Cost Performance in UAE Construction Projects

2020 ◽  
Vol 11 (2) ◽  
Author(s):  
Ahmed Salem Ahmed Marey Alhammadi ◽  
◽  
Aftab Hameed Memon ◽  
Keyword(s):  
Construction Industry ◽  
Construction Projects ◽  
Past Research ◽  
Cost Overrun ◽  
Index Method ◽  
Cost Performance ◽  
Factors Affecting ◽  
Inhibiting Factors ◽  
Critical Problems ◽  
Structured Questionnaire

UAE construction industry frequently faces poor cost performance which commonly known as cost overrun problem. This problem is resulted from several factors and it is important to identify these cost overrun factors in order to avoid and minimize it. Hence, this paper focused on determined the relevancy of factors affecting cost performance in construction projects of UAE. Through a review of past research works conducted globally, 27 factors of cost overrun were listed and used for developing a structured questionnaire. A survey was conducted with 33 practitioners from client, consultant and contractors organizations involved in handling construction projects in UAE. The respondents were requested to state their perception regarding the relevancy of each of the factors that was perceived in context with cost overrun issue using 5-points Likert scale. The responses were analysed using average index method and the results found that all the 27 factors are relevant with construction industry of UAE in causing cost overrun. These factors can be used for further investigation to uncover critical problems of cost overrun.

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