6.1.1 Call Path Tree Definition

A simple Tuxedo application call triggers a set of service invocations. The involved services constitute a tree (“call path tree”). A call path tree strictly defines the following factors:

• What type of services are involved to perform the initial service request.
• The service invocation depth (that is, the depth of the call path tree).
• The service invocation sequence. For example, client A calls SVC1. SVC1 calls SVC2 and SVC3.
• Call transportation. The edge (how information is sent and received) of a call path tree represents the transportation information from caller to service provider. It could be an IPC queue, BRIDGE connection or DOMAIN connection. The elapse time used for each transportation is also recorded.
• Call path metrics. Lots of metrics are available during the message propagation within Tuxedo system, such as the message size, execution status, transaction and CPU consumption, etc.