Origins
S3 bucket
- CloudFront can be used as an ingress (to upload files to S3)
Custom Origin (HTTP)
Application Load Balancer
EC2 Instance
S3 website (must first enable the bucket as a static s3 website)
Any HTTP backend you want
The difference between CloudFront and S3 Cross Region Replication
| CloudFront | S3 Cross Region Replication |
| Global network edge | Must be set for each region you wish replication to happen |
| Files are cached for a TTL | Files are updated in near real-time |
| Read Only | |
| Great for static content that must be available everywhere | Great for dynamic content that needs to be available at low latency in a few regions |
Price Classes
You can reduce the number of edge locations for cost reduction
Three price classes:
Price Class All: all regions - best performance
Price Class 200: most regions
Price Class 100: only the least expensive region
Cache Invalidations
If you update the back-end origins, CloudFront does not know about it and will only get the refreshed content after the expired TTL
However, you can force an entire or partial cache refresh by performing a CloudFront Invalidation
You can invalidate all files (*) or a special path (/images/*)
AWS Global Accelerator
Leverage the AWS internal network to route your application
2 Anycast IPs are created for your application
The Anycast IP sends traffic directly to Edge Locations
The Edge locations send the traffic to your application
Works with Elastic IP, EC2, ALB, NLB, public or private
Unicast vs Anycast IP
Unicast IP: one server holds one IP address
Anycast IP: all servers hold the same IP address and the client is routed to the nearest one
About the author
I am a dedicated software engineer with a deep passion for security and a commitment to developing robust and scalable solutions. With over three years of hands-on experience in the .NET ecosystem, I have built, maintained, and optimized various software applications, demonstrating my ability to adapt to diverse project needs. In addition to my expertise in .NET, I have six months of specialized experience working with Spring Boot and ReactJS, further broadening my skill set to include full-stack development and modern web technologies. My professional journey includes deploying small to medium-sized systems to cloud platforms and on-premises environments, where I have ensured reliability, scalability, and efficient resource utilization. This combination of skills and experience reflects my versatility and commitment to staying at the forefront of the ever-evolving tech landscape.
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SAA-C03 Certification
The purpose of this series is to document comprehensive notes in preparation for the AWS Solution Architect Associate Certification.