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Cloud platforms and services usually provide an APIlayer as decoupled, language agnostic interface for both front-endclient integration and back-end data and/or function access. Theavailability and performance of the APIs have significant impact onthe quality of end user or client experiences due to its nature ofinteraction endpoints. However, the extreme dynamics, complexityand scale of the current...
Data deduplication is a lossless compression technology that has been widely used in storage systems for space optimization. However, due to the removal of redundant data, the data deduplication has negative influences on data writing, data reading and data reliability. In this paper, we propose a multi-objective based performance evaluation framework to analyze the data deduplication performances...
Cloud platform providers usually offer several APIs (Application Program Interface) to help facilitate programmers to utilize cloud resources effectively by hiding complex cloud structures and mechanisms. However, there are some aspects of distributed computing that cannot be hidden. Depending on data consistency models, two or more clients may not see the same current state of the data. Developers...
The original routing mechanism with the routing metric of ETX (Expected Transmission Count) cannot assure good performance at different network environments. That is because fixed probe interval of ETX cannot adapt the change of network environment. Through simulations we verify the problem of ETX and find the relationship between routing performance and network factor (data rate). Then we propose...
With the ever growing size and complexity of enterprise systems there is a pressing need for more detailed application performance management. Due to the high data rates, traditional database technology cannot sustain the required performance. Alternatives are the more lightweight and, thus, more performant key-value stores. However, these systems tend to sacrifice read performance in order to obtain...
The concept of communication and information exchange has been revolutionized after the growth of computers. Development in computers' world, especially the Internet has made network performance a burning issue. Now we are in the scenario in which everyone is leading to the best performance. Now the things get changed when the UMTS (Universal Mobile Telecommunication System) comes into existence....
A mobile ad hoc network is a dynamic wireless network, which does not have fixed infrastructure. This paper presents a new multicast algorithm to increase the lifetime of node and network in the mobile ad hoc network. Here, it considers two metrics, namely residual-battery-capacity of the node and relay-capacity of the node to do multicasting from the source to a group of destination nodes. The proposed...
This paper quantifies the impact of topological characteristics on the performance of single radio multichannel IEEE 802.11 mesh networks. Topological characteristics are the number of nodes per subnetwork, the hop count, the neighbor node density, the hidden nodes, the number of nodes in the neighborhood of the gateway, and the hidden nodes in the neighborhood of the gateway. Network performance...
Scheduling problems are already difficult on traditional parallel machines, and they become extremely challenging on heterogeneous clusters. In this paper, we deal with the problem of scheduling multiple applications, made of collections of independent and identical tasks, on a heterogeneous master-worker platform. The applications are submitted online, which means that there is no a priori (static)...
Performance model interchange formats are common representations for data that can be used to move models among modeling tools. The Experiment Schema Extension (Ex-SE) provides a means of specifying performance studies (model runs and output). PN-Ex is an extended instantiation of the Ex-SE for Petri nets. This paper presents an experimental framework for PIPE2. A case study demonstrates the use of...
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