Use a cache policy that suits your needs

Oct 13, 2025 by pynkocean.com 60 views

Overview

In today's digital landscape, delivering high-quality media content to users is crucial for any application or website. However, fetching media directly from AWS S3 can lead to increased latency and higher costs due to frequent S3 requests. To optimize performance and reduce costs, integrating AWS CloudFront as a Content Delivery Network (CDN) is an ideal solution. In this article, we will explore the process of integrating AWS CloudFront CDN for media fetching, including setting up a CloudFront distribution, configuring caching policies, and updating the backend to fetch media from CloudFront.

Benefits of Using AWS CloudFront

AWS CloudFront is a highly secure and scalable CDN that can help reduce latency and improve the overall user experience. By caching media files at edge locations around the world, CloudFront can serve content faster and more efficiently, resulting in:

Reduced latency: CloudFront's edge locations can serve content from a location closer to the user, reducing the time it takes for media to load.
Improved performance: By caching frequently accessed media files, CloudFront can reduce the load on S3 and improve overall application performance.
Cost savings: By reducing the number of S3 requests, CloudFront can help lower costs associated with data transfer and storage.

Setting Up an AWS CloudFront Distribution

To integrate AWS CloudFront CDN for media fetching, we need to set up a CloudFront distribution with S3 as the origin. Here's a step-by-step guide to setting up a CloudFront distribution:

Step 1: Create a CloudFront Distribution

Log in to the AWS Management Console and navigate to the CloudFront dashboard.
Click on "Create distribution" and select "Web" as the distribution type.
Choose "S3" as the origin and enter the S3 bucket name and region.

Step 2: Configure the Distribution

In the "Distribution settings" section, configure the following settings:
- Default root object: Set this to the default object that should be served when a user requests the root URL of the distribution.
- Index document: Set this to the index document that should be served when a user requests a directory.
- Error document: Set this to the error document that should be served when a user encounters an error.
In the "Behaviors" section, configure the following settings:
- Cache policy: Choose a cache policy that suits your needs. You can create a custom cache policy or use one of the pre-configured policies.
- Origin request policy: Choose an origin request policy that suits your needs. You can create a custom origin request policy or use one of the pre-configured policies.

Step 3: Validate and Deploy the Distribution

Click on "Create distribution" to validate and deploy the distribution.
Once the distribution is deployed, you can verify that it is working correctly by testing it with a web browser or a tool like curl.

Configuring Caching Policies

Caching policies determine how long content is cached at the edge locations and how often it is updated. Here are some best practices for configuring caching policies:

Use a cache policy that suits your needs: Choose a cache policy that balances performance and freshness. For example, you can use a cache policy that caches content for 1 hour and updates it every 30 minutes.
Configure cache expiration: Set the cache expiration time to determine how long content is cached at the edge locations.
Configure cache invalidation: Set the cache invalidation time to determine how often content is updated at the edge locations.

Updating the Backend to Fetch Media from CloudFront

Once the CloudFront distribution is set up and configured, we need to update the backend to fetch media from CloudFront instead of directly from S3. Here's a step-by-step guide to updating the backend:

Step 1: Update the API

Update the API to fetch media from CloudFront instead of directly from S3.
Use the CloudFront URL to fetch media instead of the S3 URL.

Step 2: Update the Frontend

Update the frontend to fetch media from CloudFront instead of directly from S3.
Use the CloudFront URL to fetch media instead of the S3 URL.

Testing the Integration

Once the backend is updated to fetch media from CloudFront, we need to test the integration to ensure that media loads correctly and benefits from caching. Here are some steps to test the integration:

Verify that media loads correctly: Test that media loads correctly from CloudFront.
Verify that caching is working correctly: Test that caching is working correctly by checking the cache expiration time and cache invalidation time.
Verify that performance is improved: Test that performance is improved by checking the latency and load time of media.

Conclusion

Q: What is AWS CloudFront and how does it work?

A: AWS CloudFront is a highly secure and scalable Content Delivery Network (CDN) that can help reduce latency and improve the overall user experience. It works by caching frequently accessed media files at edge locations around the world, allowing users to access content from a location closer to them.

Q: What are the benefits of using AWS CloudFront for media fetching?

A: The benefits of using AWS CloudFront for media fetching include:

Reduced latency: CloudFront's edge locations can serve content from a location closer to the user, reducing the time it takes for media to load.
Improved performance: By caching frequently accessed media files, CloudFront can reduce the load on S3 and improve overall application performance.
Cost savings: By reducing the number of S3 requests, CloudFront can help lower costs associated with data transfer and storage.

Q: How do I set up an AWS CloudFront distribution?

A: To set up an AWS CloudFront distribution, follow these steps:

Log in to the AWS Management Console and navigate to the CloudFront dashboard.
Click on "Create distribution" and select "Web" as the distribution type.
Choose "S3" as the origin and enter the S3 bucket name and region.
Configure the distribution settings, including the default root object, index document, and error document.
Configure the behaviors, including the cache policy and origin request policy.
Validate and deploy the distribution.

Q: What are the different types of cache policies available in AWS CloudFront?

A: The different types of cache policies available in AWS CloudFront include:

Cache policy: Determines how long content is cached at the edge locations and how often it is updated.
Origin request policy: Determines how requests are made to the origin server.
Custom cache policy: Allows you to create a custom cache policy that suits your needs.

Q: How do I configure cache expiration and cache invalidation in AWS CloudFront?

A: To configure cache expiration and cache invalidation in AWS CloudFront, follow these steps:

Go to the CloudFront dashboard and select the distribution you want to configure.
Click on "Behaviors" and select the behavior you want to configure.
Click on "Cache policy" and select the cache policy you want to use.
Configure the cache expiration time and cache invalidation time.

Q: How do I update my backend to fetch media from AWS CloudFront?

A: To update your backend to fetch media from AWS CloudFront, follow these steps:

Update the API to fetch media from CloudFront instead of directly from S3.
Use the CloudFront URL to fetch media instead of the S3 URL.
Update the frontend to fetch media from CloudFront instead of directly from S3.
Use the CloudFront URL to fetch media instead of the S3 URL.

Q: How do I test the integration of AWS CloudFront with my application?

A: To test the integration of AWS CloudFront with your application, follow these steps:

Verify that media loads correctly from CloudFront.
Verify that caching is working correctly by checking the cache expiration time and cache invalidation time.
Verify that performance is improved by checking the latency and load time of media.

Q: What are the costs associated with using AWS CloudFront?

A: The costs associated with using AWS CloudFront include:

Data transfer costs: You are charged for the amount of data transferred between your origin server and the edge locations.
Request costs: You are charged for the number of requests made to the edge locations.
Storage costs: You are charged for the amount of storage used at the edge locations.

Q: How do I troubleshoot issues with AWS CloudFront?

A: To troubleshoot issues with AWS CloudFront, follow these steps:

Check the CloudFront dashboard for any errors or issues.
Check the CloudFront logs for any errors or issues.
Contact AWS support for assistance with troubleshooting.

Q: Can I use AWS CloudFront with other AWS services?

A: Yes, you can use AWS CloudFront with other AWS services, including:

Amazon S3: You can use CloudFront to cache and serve media files stored in S3.
Amazon EC2: You can use CloudFront to cache and serve media files stored on EC2 instances.
Amazon Lambda: You can use CloudFront to cache and serve media files processed by Lambda functions.