2 PHASE COMMIT OVERVIEW
Two-phase commit protocol is comprised of a set of actions that ensure a transaction involving multiple databases does not produce unsynchronized updates. Two-phase commit provides a way for a series of database interactions on multiple different data sources to be grouped together and completed or rolled back as a single transaction. Two-phase commit transactions that represent a series of database interactions on multiple data sources are referred to as global transactions. At the beginning of a global transaction, a global transaction ID (XID) is generated and used by an external transaction manager to drive the two-phase commit processing across all...