A Survivability Model for Cluster System
Even in an intrusion tolerant system, the resources will be fatigued if the intrusion is long lasting because of compromising iteratively or incrementally. In due course, the system will not provide even the minimum critical functionality. Thus we propose a model to increase the cluster system survivability level by maintaining the essential functionality. In this paper, we present the cluster recovery model with a software rejuvenation methodology, which is applicable in security field and also less expensive. Firstly, we perform the steady-state analysis of a cluster system and then study the 4th Generation Security Mechanism: Restore system with cold standby cluster. The basic idea is investigate the consequences for the exact responses in face of attacks and rejuvenate the running software or/and service, or/and reconfigure it. It shows that the system operates through intrusions and provides continued the critical functions, and gracefully degrades non-critical system functionality in the face of intrusions.
KeywordsSojourn Time Cluster System Network Survivability Survivability Level Primary Node
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