gtpd2m0vData Communications Services Reference

Performance Considerations

For each broadcast message sent by the operator, six notification messages are processed every two seconds. This means that three extra messages are processed every second, tying up three ECBs and three 381-byte blocks. This puts additional strain on the system that should be taken into consideration where the system performance is important. Since unsolicited messages are secondary, broadcast message capability should be used with care.

In addition, each user request for an unsolicited message represents an additional message. During peak periods, this additional load may significantly impact system performance and response time.

User Information

A user exit has been provided in the terminal selection segment. This is the place to add support such as switchable terminals between different hosts, special log on requirements, etc.

Restriction

The format of the unsolicited message that is sent from an application program must be the same as if it were entered from a terminal (for example, ZSNDA RES0 ...).