Cloud Fundamentals

Scalability Elasticity and High Availability

Separate scaling, elasticity, load distribution, health replacement, and high availability when designing for changing demand and failures.

Beginner14 min read
Cloud Fundamentals lessonCloud foundationsPractice

UNTIMED COACHING

Practice before the pressure

Use feedback to correct the model, not merely memorize an option position.

GUIDED PRACTICE

Practice the lesson questions

Answer normal lesson questions without a timer. Every answer includes an explanation, and incorrect answers can be tried again before continuing.

CONCEPT MODELS

See the lesson as a system

Use these visual guides to connect the key ideas before answering the questions.

Map the roles in Scalability Elasticity and High AvailabilityConnect vertical scaling, horizontal scaling, elastic response, and traffic distribution as distinct cloud roles.
Map the roles in Scalability Elasticity and High AvailabilityA cloud model connects four subject-specific roles used in scalability elasticity and high availability without collapsing their boundaries.
CPU capacityVertical scaling
Server groupHorizontal scaling
Execution processElastic response
Network connectionTraffic distribution
Verify Availability designConnect availability design with its starting inspection, expected result, and explicit safety boundary.
Verify Availability designA cloud verification model connects availability design with an inspection, result, and safety boundary.
Health evidenceAvailability design
Starting checkInspect availability design first
Expected resultVerify availability design outcome
Safety boundaryProtect availability design state