science

High-availability application architecture

High-availability application architecture is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand High-availability application architecture rather than just read about it. In short: In information technology, high-availability application architecture is a process followed when implementing a new application into an existing business-wide computer system or ERP while minimizing downtime. The architecture contains three stages: development, quality assurance, and production.

Key takeaways

High-availability application architecture belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect High-availability application architecture to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of High-availability application architecture from memory before moving on to harder problems.

Reference excerpt

In information technology, high-availability application architecture is a process followed when implementing a new application into an existing business-wide computer system or ERP while minimizing downtime. The architecture contains three stages: development, quality assurance, and production.

Definition In the above definition, high availability is "a design and implementation that ensures a certain degree of operational continuity", and application architecture refers to the actual concept and design of implementing a new configuration into the particular system.

Summary In the IT world minimizing downtime is very important, and in order to implement a new configuration into an existing computer system one must follow strict architectural guidelines before releasing the new configuration into production. Following the application architecture guidelines will greatly reduce the potential downtime when implementing a new configuration into an existing system.

Stages of architecture There are three stages that an application must go through before it "goes live." Each of these stages must pass through the transport directory before going on to the next stage.

Development The development stage is where program changes, and configuration settings are modified to meet the needs of the new or existing system.

Quality assurance During the quality assurance stage the configuration settings, and program changes that impact the application are tested. If any faults are detected, they are corrected during this stage.

Production The final stage that the application enters is the production stage, which entails the actual system that a company runs its business on.

Transport directory The transport directory serves as a compiler for all of the changes to the application that occur through the stages. This component is the mechanism that allows the changes to be tracked from stage to stage. When the application is released for production, it will be delivered out of the transport directory.

References

Worked examples

Example 1 — a first encounter with High-availability application architecture

Start with the simplest possible case. Write down what High-availability application architecture claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to High-availability application architecture before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about High-availability application architecture ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of High-availability application architecture

In research: High-availability application architecture appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses High-availability application architecture in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: High-availability application architecture is common in secondary-school and first-year university syllabi. It links to neighbouring topics Information technology management, so understanding it makes those chapters shorter.
In everyday life: Look for High-availability application architecture outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study High-availability application architecture in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what High-availability application architecture means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain High-availability application architecture out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is High-availability application architecture in simple terms?

Why does High-availability application architecture matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study High-availability application architecture?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on High-availability application architecture.