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Cloud environments are criticized for their volatility in performance aspects, making it extremely difficult for time- critical applications owners to perform the decisive step for migration and owners of SaaS to present performance vs cost tradeoffs to their customers when acting as IaaS customers. The aim of this work is to present an architectural approach based on which a)IaaS providers may enhance...
With the number of different cloud providers growing the importance for reliable and up-to-date performance data increases to make qualified decision on what providers to use to carry out different tasks. To cope with this issue, this paper proposes a framework usable for distributed and self-organized continuous benchmarking of hybrid and heterogeneous cloud environments. The framework implements...
The wide adoption of web-based distributed systems and consequently their complexity leads to an increasing demand for performance and QoS testing tools for these systems. Pushing forward open NGN protocols has resulted in a proliferation of benchmarking, interoperability and prototyping tools, yet there is still no solid strategy for integrating these efforts, collecting test information and processing...
With suitable experimental measurements, it is possible to investigate the performance and quality of the MAC and physical layer implementation of different powerline communication equipment. In this paper, we present a new method for benchmarking and test of commercially available powerline adapters' ability to recovery from the influence of overload noise on the powerline network. Compared to the...
The following topics are dealt with: storage reliability; fault tolerance; parallel input-output; storage networking; quality of service; storage systems evaluation; benchmarking; and object storage systems.
Speech quality is still and will be a major performance indicator for end-to-end QoS in (cellular) mobile telecommunication networks. Therefore, it is crucial to measure and to evaluate the behavior of speech quality in live networks either via commonly applied drive-tests or other kind of field trials. The evaluation of the measurement data is a key element in order to obtain representative and consistent...
This paper focuses on a systematical method for introducing noise (jammers) into a powerline network in order to measure the consequences on QoS for operating in-house powerline equipment under noisy conditions. Different kinds of jamming noise are introduced to a basic powerline network, and the bandwidth (throughput) is measured and compared for different types of commercially available powerline-to-Ethernet...
This paper brings into focus the need for a systematic approach to qualify in-house powerline equipment and networks for audio and video (AV) streaming applications. We present a simple isolated powerline network, suitable as a basic reference network for AV application tests, and elaborate on the possibility to extend this into a more complex AV reference network. The basic quality of service (QoS)...
Current advances in processor technology, and the rapid development of high speed networking technology, such as ATM, have made high performance network computing an attractive computing environment for large-scale high performance distributed computing (HPDC) applications. However, due to the communications overhead at the host-network interface, most of the HPDC applications are not getting the...
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