A two-phase commit protocol for a distributed transaction processing system employs the presumed-commit configuration, with the exception that the new presumed-commit protocol coordinator needs to force-write only a "commit" log record for committed transactions, not the previous force writing of two...http://www.google.com.au/patents/US5335343?utm_source=gb-gplus-sharePatent US5335343 - Distributed transaction processing using two-phase commit protocol with presumed-commit without log force
