A two-phase commit protocol ensures that transactions are uniformly committed or rolled back across multiple database servers. You can use Informix database servers with IBM Informix Enterprise Gateway products or transaction managers to manipulate data in non-Informix databases. Distributed queries across Informix database servers support two-phase commit.
The heterogeneous commit protocol ensures that updates to one or more Informix databases and one non-Informix database in a single transaction are uniformly committed or rolled back.
This chapter contains information on the use of the two-phase commit protocol. For information on recovering manually from a failed two-phase commit transaction, see Recovering Manually from Failed Two-Phase Commit.
3This chapter also contains information on using transaction 3support for XA-compliant, external data sources, which can participate in 3two-phase commit transactions. See Using Dynamic Server Transaction Support for XA-Compliant, External 3Data Sources.
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