Replicated Process Allocation for Load Distribution in Fault-Tolerant Multicomputers

  • Authors:
  • Jong Kim;Heejo Lee;Sunggu Lee

  • Affiliations:
  • Pohang Univ. of Science and Technology, Pohang, Korea;Pohang Univ. of Science and Technology, Pohang, Korea;Pohang Univ. of Science and Technology, Pohang, Korea

  • Venue:
  • IEEE Transactions on Computers
  • Year:
  • 1997

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Abstract

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 if 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.