Heterogeneous commit protocol

Used in the context of HCL Informix® database servers, the term heterogeneous environment is a group of database servers in which at least one of the database servers is a different database server. Heterogeneous commit ensures the all-or-nothing basis of distributed transactions in a heterogeneous environment.

Unlike the two-phase commit protocol, the heterogeneous commit protocol supports the participation of a participant that is not Informix. The other participant, called a gateway participant, must communicate with the coordinator through the HCL Informix gateway.

The database server uses heterogeneous commit protocol when the following criteria are met:

The following figure illustrates this scenario.
Figure 1. Configuration that requires heterogeneous commit for distributed transactions
The paragraphs that precede this figure describe the content of the figure.

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