Introduction to Pathmaker

Overview of Pathway
Introduction to Pathmaker and Pathway
067867 Tandem Computers Incorporated 1–11
Creating Applications With
Pathway
The OLTP cycle is basically a two-phase operation. First, input data is collected from
the end user and then the collected data is used to read from or update the database.
When the transaction processing cycle is examined, it becomes clear that a more
effective way to develop an application is possible. The approach used for Pathway
applications involves dividing the application into two parts: one to perform data
collection and the other to access and modify the data. The application programs that
perform these two roles are known as the requester and the server.
Requesters and servers communicate with interprocess communication (IPC)
messages. In general, Pathway requester-server applications are designed to place the
majority of data processing work in the server because servers are generally faster than
requesters. Figure 1-5 illustrates a Vehicle Registration application implemented with
the Pathway requester-server approach.