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Replicated process allocation for load distribution in fault-tolerant multicomputers

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3 Author(s)
Jong Kim ; Dept. of Comput. Sci. & Eng., Pohang Univ. of Sci. & Technol., South Korea ; Heejo Lee ; Sunggu Lee

In this paper, we consider a load-balancing process allocation method for fault-tolerant multicomputer systems that balances the load before as well as after faults start to degrade the performance of the system. In order to be able to tolerate a single fault, each process (primary process) is duplicated (i.e., has a backup process). The backup process executes on a different processor from the primary, checkpointing the primary process and recovering the process in the primary process fails. In this paper, we formalize the problem of load-balancing process allocation and propose a new process allocation method and analyze the performance of the proposed method. Simulations are used to compare the proposed method with a process allocation method that does not take into account the different load characteristics of the primary and backup processes. While both methods perform well before the occurrence of a fault, only the proposed method maintains a balanced load after the occurrence of such a fault

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Computers, IEEE Transactions on  (Volume:46 ,  Issue: 4 )