Scalability and elasticity
On This Lesson 4 topics
This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.
In this lesson
tell scalability from elasticity and say what limits each.
Planned topics
- Scalability: capacity grows with added resources at acceptable cost.
- Elasticity: capacity follows load up and down automatically.
- Limits: shared state, single writers, locks, the database; stateless tiers scale easily.
- State the scaling target with a dimension: orders per second, data size, tenants.
Draft outline details
Demonstration
a diagram of the order path with the stateless API tier scaling out and the single PostgreSQL primary marked as the limit.
Check your understanding
What usually limits horizontal scaling of an order system?
Show answer
Shared state such as the single write database.
Practice
Apply this lesson with the module's lab, exercises and quiz.
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