US Patent 7587397 Distributed transaction processing control

A distributed transaction processing system includes a master server (coordinator) and slave servers (participants). The master server and the slave servers create log file that indicates progress of a transaction. The log file is stored in a shared disk accessible from all the servers. When a fault occurs in the master server, the master server can continue a local transaction processing, which has been interrupted by the fault, after recovery from the fault by referring to the log file. When the fault occurs in any one of the slave servers, the master server can perform fault recovery of a transaction in which the faulty server is involved.