A mechanism for returning a computer system to a consistent, periodically updated state in main memory without constraining normal computer operation is provided, thereby enabling a computer system to recover from faults without loss of data or processing continuity. In a typical computer...http://www.google.fr/patents/US5751939?utm_source=gb-gplus-shareBrevet US5751939 - Main memory system and checkpointing protocol for fault-tolerant computer system using an exclusive-or memory
Main memory system and checkpointing protocol for fault-tolerant computer ...