Compression Problem Solution

D.

If responses served by Cloud CDN are not compressed but should be, check that the web server software running on your instances is configured to compress responses.

By default, some web server software will automatically disable compression for requests that include a Via header.

The presence of a Via header indicates the request was forwarded by a proxy.

To enable compression, you may have to override your web server's default configuration to tell it to compress responses even if the request had a Via header.

The most likely cause of the problem is A. You have not configured compression in Cloud CDN.

Cloud CDN is a content delivery network service offered by Google Cloud Platform (GCP) that uses HTTP(S) load balancing as the origin for cacheable content. When a client requests a resource, the request is directed to the nearest cache location in the CDN network, and the response is served from the cache location instead of the origin server. This improves the performance and reduces the load on the origin server.

Compression is a technique that reduces the size of the response sent by the origin server by encoding the content using algorithms such as Gzip or Brotli. This reduces the amount of data transferred over the network and improves the performance of the website. Compression is typically enabled on the web servers that serve the content.

If compression is enabled on the web servers but responses served by Cloud CDN are not compressed, it is likely that compression is not configured in Cloud CDN. Cloud CDN supports both Gzip and Brotli compression, and compression can be enabled at the backend service level or the cache invalidation level.

To enable compression in Cloud CDN, you can follow these steps:

1. Go to the Cloud CDN page in the GCP console.
2. Click on the name of the HTTP(S) load balancer that is serving the content.
3. Click on the backend configuration tab.
4. Click on the edit button next to the backend service that is serving the content.
5. Enable compression by selecting the compression checkbox and selecting the compression type (Gzip or Brotli).
6. Save the changes.

Once compression is enabled in Cloud CDN, responses served by Cloud CDN should be compressed, provided that compression is also enabled on the web servers and the compression types match. If compression is not enabled on the web servers, the responses served by Cloud CDN will not be compressed. If the compression types configured on the web servers and Cloud CDN are different, responses may still be served uncompressed.

Therefore, it is important to ensure that compression is configured properly both on the web servers and in Cloud CDN to ensure optimal performance and reduce the load on the origin server.