Hierarchical index system for crash-stop service failure detection

Service Availability is an important method meeting adaptive and general requirements of service failure detection and largely affected by failure detection indexes. Therefore, how to select appropriate indicators of service failure detection is an important issue. However, only small number of indicators in the existing service availability mechanism can´t accurately describe the complex situation of a distributed system, thus difficult to meet the QoS requirements of applications. After researching on existing service failure detection algorithms, applications´ failures and network survivability, this paper proposes a hierarchical index system for crash-stop service failure detection that considers ability to provide services, network performance, and load brought by failure detection.