|
Before PCs became common place applications lived on the same
servers as the data and where delivered to the end-user using
'green-screen' technology. Things have changed and the following
questions need to be answered before an application can be designed
and deployed.
 |
Where do the client applications reside.
Client application can be on the database server, or the
end-user's PC or on an application server that sits between the
PC and the server. |
|
Should the database be distributed or centralised.
Although the database is global logical areas may be
distributed onto national servers. It might be the case that the
size of the database is such that a single server solution is not
possible and the database must be distributed across multiple
servers to achieve the performance that is required. |
|
What is the communication layer between the application and
the server.
Local clients can communicate either via shared memory or
TCP/IP. Connecting via shared memory do not incur the
added networking costs, but again the server might not be
capable of supporting the application and the database. |
|
