HTTP/2 is the second major version of the Hypertext Transfer Protocol (HTTP). Compared with HTTP/1.1, it introduces several important features, including multiplexing, header compression, request prioritization, and server push. These features help address HTTP/1.1 performance limitations such as head-of-line blocking and inefficient TCP usage, significantly improving web performance.

Atomile allows you to enable HTTP/2 on the CDN for both end-user requests and back-to-origin requests, helping improve webpage loading speed.

How to Enable HTTP/2

1. Log in to the Atomile Console and select the appropriate product.
2. Go to Configuration, locate the domain you want to configure, and click Edit Configuration at the top or the Edit button to the right of the domain.
3. On the Edit Configuration page, locate Protocol Settings > HTTP/2, then enable the feature (disabled by default). This allows CDN edge servers to communicate with end users using the HTTP/2 protocol.
4. If you also want CDN edge servers to communicate with the origin server using HTTP/2, select HTTP/2 under Origin Protocol Version on the configuration page.

Origin Protocol Version

The available options for Origin Protocol Version are HTTP/1.1, Same as Client Request Protocol, and HTTP/2. The system default is HTTP/1.1.

After making the configuration changes, click Next to proceed with deployment. To minimize potential disruption to your production environment, we strongly recommend performing a Pre-deploy test in a staging environment. This important step ensures that your configuration is correct before it goes live.

After you confirm that the settings are correct, click Deploy Now to apply them in the live environment. The configuration typically takes effect within 3 to 5 minutes. For more information about pre-deployment testing and validation, refer to Deploy the Configurations to Staging Environment for Validation.

Notes

Some Atomile products may not currently support configuring HTTP/2 for back-to-origin communication. In that case, the Origin Protocol Version option is not available, and the back-to-origin protocol defaults to HTTP/1.1.

If you have any questions or need further assistance, please contact Atomile technical support.