An unscalable system can??™t deal with an
increasing number of clients, no matter how many hardware resources are provided. Because
we??™re optimistic about the number of customers, we must be sure that the site will be capable
of delivering its functionality to a large number of clients without throwing out errors or performing
sluggishly.
Reliability is also a critical aspect for an e-commerce application. With the help of a coherent
error-handling strategy and a powerful relational database, you can ensure data integrity
and ensure that noncritical errors are properly handled without bringing the site to its knees.
The Magic of the Three-Tier Architecture
Generally, the architecture refers to the way we split the code that implements a feature of the
application into separate components based on what they do and grouping each kind of component
into a single logical tier.
In particular, the three-tier architecture refers to an architecture that is based on these
tiers:
??? The presentation tier
??? The business tier
??? The data tier
The presentation tier contains the user interface elements of the site and includes all the
logic that manages the interaction between the visitor and the client??™s business. This tier
makes the whole site feel alive, and the way you design it has a crucial importance for the site??™s
success. Because your application is a web site, its presentation tier is composed of dynamic
web pages.
Pages:
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70