Design or Architecture Pattern?

ARCHITECTURAL PATTERN
An architectural pattern is a general, reusable solution to a commonly occurring
problem in software architecture within a given context. Architectural patterns are
similar to software design pattern but have a broader scope
Some of the most common architectural patterns are:
1. Layered pattern
This pattern can be used to structure programs that can be decomposed into groups of
subtasks, each of which is at a particular level of abstraction. Each layer provides services
to the next higher layer.
The most commonly found 4 layers of a general information
system are as follows.
• Presentation layer (also known as UI layer)
• Application layer (also known as service layer)
• Business logic layer (also known as domain layer)
• Data access layer (also known as persistence layer)
Usage
• General desktop applications.
• E commerce web applications.
Layer Pattern

2. Client-server pattern
This pattern consists of two parties; a server and multiple clients. The server component
will provide services to multiple client components. Clients request services from the
server and the server provides relevant services to those clients. Furthermore, the server
continues to listen to client requests.
Usage
• Online applications such as email, document sharing and banking.
Client-server pattern

3. Master-slave pattern
This pattern consists of two parties; master and slaves. The master component
distributes the work among identical slave components, and computes a final result from
the results which the slaves return.
Usage
• In database replication, the master database is regarded as the authoritative
source, and the slave databases are synchronized to it.
• Peripherals connected to a bus in a computer system (master and slave drives).
Master-salve pattern

4. Pipe-filter pattern
This pattern can be used to structure systems which produce and process a stream of
data. Each processing step is enclosed within a filter component. Data to be processed is
passed through pipes. These pipes can be used for buffering or for synchronization
purposes.
Usage
• Compilers. The consecutive filters perform lexical analysis, parsing, semantic
analysis, and code generation.
• Workflows in bioinformatics.
Pipe-filter pattern