FSE

This paper describes an online control framework to design self-managing distributed computing systems that continually optimize their performance in response to changing computing demands and environmental conditions. An online control technique is ...

Failure recovery in distributed systems poses a difficult challenge because of the requirement for high availability. Failure scenarios are usually unpredictable so they can not easily be foreseen. In this research we propose a planning based approach ...

One way to improve the flexibility and robustness of a system is to enable a range of behaviours to be supported and to select that which is most appropriate to the prevailing conditions during run time. This paper considers the issue of effecting ...

Self-adaptive systems modify their own behaviour in response to stimuli from their operating environments. The major policy considerations for such systems are determining what, when and how adaptations should be carried out. This paper presents ...

This paper proposes the RAFTING approach (Resource-based Approach to FeaTure InteractioN) to address the feature interaction problem in the context of dynamically adapted software. RAFTING focuses on the resources used by features, rather than the ...

As dynamic software architecture use becomes more widespread, a variety of formal specification languages have been developed to gain a better understanding of the foundations of this type of software evolutionary change. In this paper we survey 14 ...

Currently, paradigms such as component-based software development and service-oriented software architectures promote modularization of software systems into highly decoupled and reusable software components and services. In addition, to improve ...

Components in a decentralised system are faced with uncertainty as how to best adapt to a changing environment to maintain or optimise system performance. How can individual components learn to adapt to recover from faults in an uncertain environment? ...

Traditionally, software models are associated with development and maintenance related activities. This paper demonstrates that models also serve a vital purpose in supporting the self awareness and management of software systems in their deployed ...

Complex distributed Internet services form the basis not only of e-commerce but increasingly of mission-critical network-based applications. What is new is that the workload and internal architecture of three-tier enterprise applications presents the ...

Recently there has been increasing interest in developing systems that can adapt dynamically to cope with changing environmental conditions and unexpected system errors. Most efforts for achieving self-adaptation have focused on the mechanisms for ...

Self-adaptive software continually evaluates and modifies its own behavior to meet changing demands. One of the key issues in constructing such software is that of planning when and what kinds of adaptations are appropriate. In this paper, we present an ...

Component-based software engineering offers a way to partition complex systems into well-defined parts. Adaptation mechanisms are crucial to enable run-time reconfiguration and to increase the reuse of these parts in other applications and environments. ...

The use of handheld networked devices to access information systems by people moving around is spreading rapidly. Systems being used in this way typically face dynamic variation in their operating environment. In order to maintain the usability and ...

We propose a high-level approach to software architecture that bridges the gap between system requirements (in the problem space) and the architectural design (in the solution space). We use abstract constraint- and intent-based architectural ...

Continuous numeric prediction techniques known as model trees which build decision trees and then use linear regression at the terminal nodes are used to characterize resource consumption in a computer system. An advantage of model trees over time ...

Constructing adaptive software that is capable of changing behavior at runtime is a challenging software engineering problem. However, the problem of determining when and how such a system should adapt, i.e., the system's adaptation policy, can be even ...

Self-managed software requires monitoring and code changes to an executing program. One technology that enables such self management is software dynamic translation (SDT), which allows a program's execution to be intercepted and controlled by a separate ...

A distributed software system's deployment architecture can have a significant impact on the system's properties, which depend on various system parameters, such as network bandwidth, frequencies of software component interactions, and so on. Recent ...

Increasing demands for reliability and dependability clash with the reality of escalating security compromises and vulnerability discoveries. Improvements in attack methodologies such as polymorphic viruses, tampering of source code repositories, and ...

The development of dependable software systems is a costly undertaking. Fault tolerance techniques as well as self-repair capabilities usually result in additional system complexity which can even spoil the intended improvement with respect to ...

Although each application of self-management techniques encounters problems and solutions unique to the application domain, there are several cross-cutting "patterns of self-management" that can be discerned. Much like programming patterns, these ...