March 12th 2024

Scalability, Elasticity, and Agility

Resources cost money
Charged for disk space, CPU, memory, bandwidth
Minimize cost by minimizing resources used
Resource needs change quickly
Resource demand can fluctuate based on
1. Particular day
2. Time of day
3. Increase in popularity
Scalable architectures provide the ability to grow your environment when this is needed (increase in number of users,
traffic throughput)
Example: Workload increased as business expanded over some time
Two types of Scalability:
1. Vertical Scalability
2. Horizontal Scalability

Scalability: Scalable architectures provide the ability to grow your environment when this is needed (increase in number of users, traffic throughput)
Example: Workload increased as business expanded over some time

Two types of Scalability:

Elasticity: Ability to automatically expand or compress the infrastructural resources on a sudden up and down in the requirement so that the workload can be managed efficiently.
Example: workload increases during festive season like Christmas.

Elasticity	Scalability
Elasticity is used just to meet the sudden ups and downs in the workload for a small period.	Scalability is used to meet the static increase in the workload.
Elasticity is used to meet dynamic changes, where the resources needed can increase or decrease.	Scalability is always used to address the increase in workload in an organization.
It is short-term planning and adopted just to deal with an unexpected increase in demand or seasonal demands.	Scalability is a long-term planning adopted just to deal with an expected increase in demand.

Agility: Rapidly deploy and configure cloud resources as your app’s needs change.

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