A Reliability Evaluation of Time-Constrained Distributed Software

When evaluating distributed software reliability, the model based-on respective distributed program is often used. However, current reliability models can only be used for distributed program evaluation and can not reflect the effects of real-time constraints. Proposed in this paper is an approach for the reliability evaluation of distributed programs that addresses real-time constraints. The approach proposed here is based on the principle of distributed program reliability evaluation, namely combining reduction with breadth-first manner, and then the transmission time is evaluated to find the time needed to complete execution of the file spanning tree for a given program. If the transmission time of a file spanning tree exceeds the execution deadline, it is unsuccessful whereas a file spanning tree is operational. A simple distributed real-time system is used to illustrate the feasibility of the proposed approach.