The Multitier Model - HP Reliable Transaction Router Getting Started

The Three-Tier Architecture
Figure 2–1 The Multitier Model
Client application processes run on nodes defined to have the
frontend role. This tier allows computing power to be provided
locally at the end-user site for transaction acquisition and
presentation.
Server application processes (represented by ''Server application''
in Figure 2–1) run on nodes defined to have the backend role.
This tier:
•
•
•
2–2 Architectural Concepts
FE
Client
application
FE
Client
application
FE
Client
application
FE
Client
application
Terminals Frontends
Enables the database to be distributed geographically
Permits replication of servers to cope with network, node or
site failures
Allows computer resources to be added to meet performance
requirements
BE
Server
application
TR
BE
Server
application
TR BE
Server
application
Routers Backends
Database
VM-0839A-AI