Optimal Fault Tolerance Strategy Selection for Web Services

2012 ◽  
pp. 218-237
Author(s):  
Zibin Zheng ◽  
Michael R. Lyu
Keyword(s):  
Fault Tolerance ◽  
Web Services ◽  
Real World ◽  
Evaluation Framework ◽  
Strategy Selection ◽  
Tolerance Strategy ◽  
Strategy Evaluation ◽  
Service Oriented ◽  
Selection Framework ◽  
Qos Performance

Service-oriented systems are usually composed by heterogeneous Web services, which are distributed across the Internet and provided by organizations. Building highly reliable service-oriented systems is a challenge due to the highly dynamic nature of Web services. In this paper, the authors apply software fault tolerance techniques for Web services, where the component failures are handled by fault tolerance strategies. In this paper, a distributed fault tolerance strategy evaluation and selection framework is proposed based on versatile fault tolerance techniques. The authors provide a systematic comparison of various fault tolerance strategies by theoretical formulas, as well as real-world experiments. This paper also presents the optimal fault tolerance strategy selection algorithm, which employs both the QoS performance of Web services and the requirements of service users for selecting optimal fault tolerance strategy. A prototype is implemented and real-world experiments are conducted to illustrate the advantages of the evaluation framework. In these experiments, users from six different locations perform evaluation of Web services distributed in six countries, where over 1,000,000 test cases are executed in a collaborative manner to demonstrate the effectiveness of this approach.

Optimal Fault Tolerance Strategy Selection for Web Services

2010 ◽  
Vol 7 (4) ◽  
pp. 21-40 ◽  
Author(s):  
Zibin Zheng ◽  
Michael R. Lyu
Keyword(s):  
Fault Tolerance ◽  
Web Services ◽  
Real World ◽  
Evaluation Framework ◽  
Strategy Selection ◽  
Tolerance Strategy ◽  
Strategy Evaluation ◽  
Service Oriented ◽  
Selection Framework ◽  
Qos Performance

Service-oriented systems are usually composed by heterogeneous Web services, which are distributed across the Internet and provided by organizations. Building highly reliable service-oriented systems is a challenge due to the highly dynamic nature of Web services. In this paper, the authors apply software fault tolerance techniques for Web services, where the component failures are handled by fault tolerance strategies. In this paper, a distributed fault tolerance strategy evaluation and selection framework is proposed based on versatile fault tolerance techniques. The authors provide a systematic comparison of various fault tolerance strategies by theoretical formulas, as well as real-world experiments. This paper also presents the optimal fault tolerance strategy selection algorithm, which employs both the QoS performance of Web services and the requirements of service users for selecting optimal fault tolerance strategy. A prototype is implemented and real-world experiments are conducted to illustrate the advantages of the evaluation framework. In these experiments, users from six different locations perform evaluation of Web services distributed in six countries, where over 1,000,000 test cases are executed in a collaborative manner to demonstrate the effectiveness of this approach.

A Stitch in Time Saves Nine: Early Improving Code-First Web Services Discoverability

2015 ◽  
Vol 24 (02) ◽  
pp. 1550004 ◽  
Author(s):  
Cristian Mateos ◽  
Marco Crasso ◽  
Alejandro Zunino ◽  
José Luis Ordiales Coscia
Keyword(s):  
Web Services ◽  
Web Service ◽  
Real World ◽  
Service Discovery ◽  
Statistical Correlation ◽  
Web Service Discovery ◽  
Computing Paradigm ◽  
Service Oriented ◽  
Wsdl Documents ◽  
Pattern Occurrences

Web Services represent a number of standard technologies and methodologies that allow developers to build applications under the Service-Oriented Computing paradigm. Within these, the WSDL language is used for representing Web Service interfaces, while code-first remains the de facto standard for building such interfaces. Previous studies with contract-first Web Services have shown that avoiding a specific catalog of bad WSDL specification practices, or anti-patterns, can reward Web Service publishers as service understandability and discoverability are considerably improved. In this paper, we study a number of simple and well-known code service refactorings that early reduce anti-pattern occurrences in WSDL documents. This relationship relies upon a statistical correlation between common OO metrics taken on a service's code and the anti-pattern occurrences in the generated WSDL document. We quantify the effects of the refactorings — which directly modify OO metric values and indirectly alter anti-pattern occurrences — on service discovery. All in all, we show that by applying the studied refactorings, anti-patterns are reduced and Web Service discovery is significantly improved. For the experiments, a dataset of real-world Web Services and an academic service registry have been employed.

Adaptive Future Internet Applications

2018 ◽  
pp. 1568-1589 ◽  
Author(s):  
Clarissa Cassales Marquezan ◽  
Andreas Metzger ◽  
Klaus Pohl ◽  
Vegard Engen ◽  
Michael Boniface ◽  
...  
Keyword(s):  
Web Services ◽  
Real World ◽  
Network Connectivity ◽  
Future Internet ◽  
Future Research ◽  
Service Provisioning ◽  
Internet Applications ◽  
Research Challenges ◽  
Adaptive Capabilities ◽  
Service Oriented

Adaptive capabilities are essential to guarantee the proper execution of Web services and service-oriented applications once dynamic changes are not exceptions but the rule. The importance of adaptive capabilities significantly increases in the context of Future Internet (FI) applications will have to autonomously adapt to changes on service provisioning, availability of things and content, computing resources, and network connectivity. Current solutions for adaptive Web services and adaptive service-based applications will be challenged in such a setting because they fall short to support essential characteristics of FI applications. This chapter analyzes and justifies the need for the transition from adaptive Web services and service-based applications to adaptive FI applications. Based on two real-world use cases from multimedia and logistics, the authors examine where current solutions fall short to properly address the adaptive needs of FI applications. They propose future research challenges that should be considered in adaptive FI applications.

Adaptive Future Internet Applications

2012 ◽  
pp. 333-353 ◽  
Author(s):  
Clarissa Cassales Marquezan ◽  
Andreas Metzger ◽  
Klaus Pohl ◽  
Vegard Engen ◽  
Michael Boniface ◽  
...  
Keyword(s):  
Web Services ◽  
Real World ◽  
Network Connectivity ◽  
Future Internet ◽  
Future Research ◽  
Service Provisioning ◽  
Internet Applications ◽  
Research Challenges ◽  
Adaptive Capabilities ◽  
Service Oriented

Adaptive capabilities are essential to guarantee the proper execution of Web services and service-oriented applications once dynamic changes are not exceptions but the rule. The importance of adaptive capabilities significantly increases in the context of Future Internet (FI) applications will have to autonomously adapt to changes on service provisioning, availability of things and content, computing resources, and network connectivity. Current solutions for adaptive Web services and adaptive service-based applications will be challenged in such a setting because they fall short to support essential characteristics of FI applications. This chapter analyzes and justifies the need for the transition from adaptive Web services and service-based applications to adaptive FI applications. Based on two real-world use cases from multimedia and logistics, the authors examine where current solutions fall short to properly address the adaptive needs of FI applications. They propose future research challenges that should be considered in adaptive FI applications.

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