Energy-aware passive replication of processes
Journal of Mobile Multimedia
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The electric power consumption of servers has to be reduced in information systems in addition to increasing the performance and fault-tolerancy in order to realize green societies. In information systems, servers mainly consume the electric power to perform processes requested by clients. We consider computation (CP) and storage (ST) types of application processes to be performed on servers. In CP processes, CPU resource is mainly consumed. In ST processes, storage drives are manipulated in a server. First, we present the storage based power consumption (SBPC) model of a server st to perform ST and CP processes. The SBPC model is a four state model, where the power consumption rate of the server is one of four rates minEt, max STt, max Ct, and max STCt. Here, the power consumption rate Et(t) of a server st of time _ is minimum minEt if no process is performed. Et(t) the power consumption rate is max STt if only and at least one ST process is performed. Et(t) is max Ct if only and at least one CP process is perfomed on the server st. If both ST and CP processes are performed, Et(_t) is max STCt. Here, minEt