Compaq Reliable Transaction Router Getting Started page 21

single node configuration can be useful during development, but
would not normally be used when your application is deployed.
Figure 1–9 RTR with Browser, Single Node, and Database
Browser
When creating the configuration used by an application and
defining the nodes where a facility has its frontends, routers,
and backends, the setup must also define which nodes will
have journal files. Each backend in an RTR configuration must
have a journal file to capture transactions when other nodes
are unavailable. When applications are deployed, often the
backend is separated from the frontend and router, as shown in
Figure 1–10.
Figure 1–10 RTR Deployed on Two Nodes
Browser
FE
TR
FE TR
Client
RTR Terminology
BE
DB
LKG-11207-98WI
DB
BE
Server
Journal
LKG-11208-98WI
Introduction 1–11