EXTENDED FUNCTION OF SUBSCRIBER DISTRIBUTED TWO PHASE COMMIT PROTOCOL

摘要

PURPOSE: To provide an expansion function of two-phase commit protocol which attains the subscription of distributed subscribers between physically separated agents without relying upon the communication mechanism used by data processing systems. CONSTITUTION: A special processing state called first-phase (EPOP) which can distribute coordinator functions by using an arbitrary communication mechanism is added to a two-phase commit protocol. A subscriber sends a two-phase commit protocol sequence to a distributed system in a special stage in which the subscriber can acquire a control right. The communication mechanism is used so that the mechanism can become part of a distributed coordinator. The coordinator itself does not require the knowledge about the other systems. The special processing system is validated by operating system service called first-phase terminating process enable (EEPOEP). Because of the EEPOEP, the expansion function of the two-phase commit protocol can be used on an executing-side system.