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Nowadays, the consequences of failure and downtime of distributed systemshave become more and more severe. As an obvious solution, these systemsincorporate protection mechanisms to tolerate faults that could cause systemsfailures and system dependability must be validated to ensure that protectionmechanisms have been implemented correctly and the system will provide thedesired level of reliable service. This paper presents a systematic approachfor identifying (1) characteristic sets of critical system elements fordependability testing (single points of failure and recovery groups) based onthe concept of layered networks; and (2) the most important combinations ofcomponents from each recovery group based on a combinatorial technique. Basedon these combinations, we determine a set of test templates to be performed todemonstrate system dependability.

Dependability Tests Selection Based on the Concept of Layered Networks