When considering the addition of a mobile presentation channel to an existing web-based application, project managers should know how the mobile channel’s characteristics will impact the user experience and the cost of using the application, even before development begins. The PETTICOAT (Performance Tuning and cost discovery of mobile web-based Applications) approach presented here provides dec...

The development of a high-performance parallel system or application is an evolutionary process -both the code and the environment go through many changes during a program's lifetime -and at each change, a key question for developers is: how and how much did the performance change? No existing performance tool provides the necessary functionality to answer this question. This paper reports on t...

After more than a decade of a virtual standstill, the adoption of temporal data management features has recently picked up speed, driven by customer demand and the inclusion of temporal expressions into SQL:2011. Most of the big commercial DBMS now include support for bitemporal data and operators. In this paper, we perform a thorough analysis of these commercial temporal DBMS: We investigate t...

The nascent and rapidly evolving state of parallel systems often leaves parallel application developers at the mercy of ineecient, innexible operating system software. To assess the feasibility of performance tuning via malleable system software and to understand the performance penalties for detailed operating system performance data capture, we describe a set of performance experiments with C...

The issues concerning the performance of commercial-off-the-shelf (COTS) components have gained much attention in the research community recently. Predicting the performance of a system constructed from components is beneficial for reasons such as bottleneck identification and performance tuning. However, the research status in this area is still relatively immature. Component technologies such...

— This article reports on the development and implementation of an algorithm for the design of spatially-distributed feedback controllers for the wide variety of physical processes that are included in cross-directional control of industrial paper machines. The spatial and temporal structure of this class of process models is exploited in the use of the two-dimensional frequency domain for anal...

Principle Devices share services and collaborate to maintain the community. → Dynamical control of the architecture. → State of the system observation and distributed decision process. Principle Devices share services and collaborate to maintain the community. → Dynamical control of the architecture. → State of the system observation and distributed decision process. Heterogeneity of devices Be...

This chapter surveys the issues of collecting monitoring data for performance debugging of parallel programs executed in cluster environments. The main categories of monitoring tools are either clock driven or event driven, the latter including timing, counting or tracing. The paper focuses on software tracing, deemed the most general and portable event driven monitoring technique. The lack of ...

The AgreementMaker system for ontology matching includes an extensible architecture, which facilitates the integration and performance tuning of a variety of matching methods, an evaluation mechanism, which can make use of a reference matching or rely solely on quality measures, and a multi-purpose user interface, which drives both the matching methods and the evaluation strategies. Our demo fo...

A major cause of failures in large database management systems (DBMS) is operator/administrator faults. Although most of the complex DBMS available today have comprehensive recovery mechanisms, the effectiveness of these mechanisms is difficult to characterize. On the other hand, the tuning of a large database is very complex and database administrators tend to concentrate on performance tuning...