(1) A protocol that is used by a sync point manager to commit a transaction when only resources that are managed as a single entity are changed during the transaction. For example, one-phase commit would be used when a single database on a single system is changed. If either the system or communications fail during a one-phase commit, the sync point manager may not be informed of whether the changes were committed or rolled back.
(2) A protocol with a single commit phase, that is used for the coordination of changes to recoverable resources when a single resource manager is involved.