Scalability and Storage Strategy
To build a truly “cloud-native” application, you must move away from static configurations. Auto Scaling Groups (ASG) automatically add or remove EC2 instances based on metrics like CPU utilization. This ensures performance during spikes and cost-savings during idle times.
Decoupling with Storage
Storage in AWS isn’t just “disks.” It’s categorized by use case:
- EBS (Elastic Block Store): Persistent block storage for EC2 (like a hard drive).
- S3 (Simple Storage Service): Object storage for files, images, and backups. It is designed for 99.999999999% (11 nines) of durability.
- RDS (Relational Database Service): Managed SQL databases. Architecturally, RDS is superior to running a DB on EC2 because it handles backups, patching, and “Multi-AZ” failover automatically.
Load Balancing
An Application Load Balancer (ALB) sits in front of your ASG. It distributes incoming traffic across all healthy instances. If an instance fails, the ALB stops sending traffic to it, and the ASG replaces it. This creates a self-healing system.
Scalability & Storage
Question 1 of 2
Which service is best for storing millions of images with high durability?
In this section, I learned:
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