Hypervisor-based fault tolerance

  • Authors:
  • Thomas C. Bressoud;Fred B. Schneider

  • Affiliations:
  • Isis Distributed Systems, Marlborough, MA;Cornell Univ., Ithaca, NY

  • Venue:
  • ACM Transactions on Computer Systems (TOCS) - Special issue on operating system principles
  • Year:
  • 1996

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Abstract

Protocols to implement a fault-tolerant computing system are described. These protocols augment the hypervisor of a virtual-machine manager and coordinate a primary virtual machine with its backup. No modifications to the hardware, operating system, or application programs are required. A prototype system was constructed for HP's PA-RISC instruction-set architecture. Even though the prototype was not carefully tuned, it ran programs about a factor of 2 slower than a bare machine would.