The TRANSPORT-UNIT-SIZE parameter defines the maximum length of the message transmitted to the transport system by openFT. Message flow control ensures that only a specific number of messages are being transmitted across the network at any one time. The TRANSPORT-UNIT-SIZE parameter enables the administrator to control the amount of FT data per connection present in the network at a particular time. The value specified for TRANSPORT-UNIT-SIZE can be changed by the remote system or by the transport system (maximum message length).
A maximum value of 65535 is recommended for TRANSPORT-UNIT-SIZE. This value is the default value after installation.
Higher TRANSPORT-UNIT-SIZE:
increased data throughput
reduced load on the local system since fewer calls to the transport system are necessary.
Lower TRANSPORT-UNIT-SIZE:
reduced load on the network
the time required to transmit an FT message across a communication link is reduced, which in turn decreases the wait time for messages from other users. For slow communication links, response times can, for example, be improved in interactive mode.