TRANSFER Installation and Management Guide

Concepts of Package Delivery
The TRANSFER Environment
068837, Update 1 to 013198 Tandem Computers Incorporated 2–29
Concepts of Package
Delivery
Figure 2-5 illustrates how the primary components of TRANSFER work together;
processes other than those shown in the illustration can also be involved in package
delivery. This figure shows communication between two correspondents at two
different nodes: Mary at the \NY node and John at the \CHIC node. The TRANSFER
processes in this figure are the interactive server (TISERV), the scheduler (TSCHED),
an asynchronous requester process (TAREQ), a worker server (TWORK), a network
receiver (TRECV), and an asynchronous server (TISERV-ASYNC).
When TRANSFER is stopped at one node in a network, that node becomes unavailable
to other nodes in the network for TRANSFER applications. Packages posted for
delivery to an unavailable node are held until TRANSFER is started again at that node.
Packages are then automatically transported to the previously unavailable node.
A detailed explanation of the example follows Figure 2-5.