01
Front
What does scalability mean?
Back
Scalability is a system’s ability to handle a growing workload by increasing capacity while continuing to meet performance requirements.
Free Online Flashcard Deck
3 Scalability and Elasticity Free Online FlashCards
Study 3 Scalability and Elasticity with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.
12 cards
02
Front
What is vertical scaling?
Back
Vertical scaling, or scaling up, gives an existing server more resources, such as CPU or memory.
03
Front
What approach suits steady, long-term workload growth?
Back
For steady, long-term growth, plan for scalability by adding capacity or redesigning components as the workload grows.
04
Front
Why maintain baseline capacity while scaling out?
Back
Provisioning takes time, so maintain enough baseline capacity to serve demand while additional resources start.
05
Front
What does an EC2 Auto Scaling group do?
Back
An EC2 Auto Scaling group manages a group of instances and adjusts capacity according to configured scaling policies.
06
Front
What is horizontal scaling?
Back
Horizontal scaling, or scaling out, adds servers or other instances so work can be shared across more resources.
07
Front
What does elasticity mean?
Back
Elasticity is the ability to add capacity when demand rises and release it when demand falls, often automatically and quickly.
08
Front
How do scalability and elasticity differ?
Back
Scalability asks whether capacity can grow to handle more workload; elasticity asks whether capacity can adjust up and down as demand changes.
09
Front
How are elasticity and scaling related?
Back
Elasticity uses scaling mechanisms to adjust capacity as demand changes, so the concepts work together rather than oppose each other.
10
Front
How can a system be scalable but not elastic?
Back
A system may be scalable but not elastic if staff can add servers for growth but must remove them manually or leave them running after a temporary peak.
11
Front
How can a system handle short, predictable peaks?
Back
For short, predictable peaks, scheduled scaling can increase capacity before a known event and reduce it afterward.
12
Front
What approach suits unpredictable, rapidly changing demand?
Back
For unpredictable or rapidly changing demand, use demand-based elasticity with policies responding to useful workload signals.
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