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05-05-2017, 10:28 AM

Hi i am kavya i would like to get details on software architecture notes by ashok kumar

jaseela123d · 06-05-2017, 09:24 AM

Software architecture refers to the high-level structures of a software system, the discipline of creating such structures, and documentation of these structures. These structures are necessary to reason about the software system. Each structure comprises software elements, relationships between them, and properties of both elements and relationships. The architecture of a software system is a metaphor, analogous to the architecture of a building.

Software architecture is to make fundamental structural choices that are costly to change once implemented. Software architecture options include structural options specific to the possibilities in software design. For example, the systems controlling the launch vehicle of the space shuttle were required to be very fast and very reliable. Therefore, an appropriate real-time computing language would have to be chosen. In addition, to meet the need for reliability, one could choose to have multiple redundant and independently produced copies of the program, and to run these copies on standalone hardware while checking the results.

Software architecture documentation facilitates communication among stakeholders, captures early decisions about high-level design, and allows reuse of design components among projects.

Opinions vary as to the scope of software architectures:

• In general, the structure of the macroscopic system; This refers to architecture as a top-level abstraction of a software system consisting of a collection of computational components along with connectors that describe the interaction between these components.

• The important thing - whatever it is; This refers to the fact that software architects should be concerned with those decisions that have a high impact on the system and its stakeholders.

• What is fundamental to understand a system in its environment "

• Things people perceive as difficult to change; Since architecture design takes place early in the life cycle of a software system, the architect must focus on the decisions that "have to" be right the first time. Following this line of thinking, problems of architectural design may become non-architectural once its irreversibility can be overcome.

• A set of architectural design decisions; Software architecture should not be considered merely a set of models or structures, but should include the decisions that lead to these particular structures, and the reason behind them. This vision has led to substantial research in knowledge management software architecture.

There is no clear distinction between software architecture and design and requirements engineering (see the fields below). They all form part of a "chain of intentionality" from high-level intentions to low-level details.

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