Automatic fault diagnosis is an important problem for system management. In this paper, we combine high level symptom descriptions and low level state information to solve the system fault diagnosis problem. We extract state-symptom correlation information from knowledge sources in text format, and then use symptom similarity to rank the candidate system states. We apply the method to Windows R...

The ever increasing complexity of network management demands tools to aid human operators to perform their tasks. Many expert systems have been developed to perform automatically fault correlation and diagnosis in telecommunications networks, but most of them are monolithic systems, oriented to a specific domain of application, and only a few are in accordance with present ISO standards for OSI...

Superconductor fault current limiter (SFCL) is an effective device to suppress high fault currents. This paper presents a comparative study of resistive and inductive fault current limiters from transient stability point of view.  Appropriate location and type of the limiters in a HV substation is selected by a qualitative approach based on the equal area criterion. Study system is simulated by...

As the importance of reliable data storage increases, various techniques are applied to obtain the reliabilities. The usage of the assumed fault tolerant cloud providers increases, even though not a sufficient amount of research is performed on their fault tolerance. On cloud servers, a distributed Database Management System (DBMS) can be used to achieve safe data storage. Various DBMSs are mak...

This paper discusses the emerging area of autonomic computing and its implications for the evolution of faultmanagement systems. Particular emphasis is placed on the concept of event correlation and its role in system self-management. A new correlation analysis tool to assist with the development, management and maintenance of correlation rules and beliefs is described.

A Business Process Management System (BPMS) supports business processes and organizations depend on its availability. Web services have been pointed as a suitable technology for BPMSs. Thus, the inclusion of fault tolerance in the Web service architecture is essential for process continuity. The goal of this paper is to propose a fault tolerant Web service architecture to be used with BPMSs. Th...

In this paper we demonstrate how to formalize UML-based development of protective wrappers for tolerating transient faults. In particular, we focus on the fault tolerance mechanisms common in the avionics domain and show the development of a protective wrapper, called Failure Management System. We demonstrate how to integrate the formal refinement approach proposed earlier into the UML-based de...

Systems with high dependability requirements are increasingly relying on complex on-line fault management systems. Such fault management systems involve a combination of multiple steps – monitoring, data analysis, planning and execution – that are typically independently developed and optimized. We argue that it is inefficient and ineffective to improve any particular fault management step with...

In this paper, the authors present an architecture and implementation of a distributed database system using sharding to provide high availability, fault-tolerance, and scalability of large databases in the cloud. Sharding, or horizontal partitioning, is used to disperse the data among the data nodes located on commodity servers for effective management of big data on the cloud. Database Shardi...