What geographic areas does DSA cover and not cover?
One price covers geographies served by existing Content Delivery Network zones.
Content Delivery Network
Related questions and answers
No. When the Content Delivery Network receives a request for an object that is not at an edge location, it makes a request to Azure Storage to obtain the data. The cost of reading data from Storage and transferring data from Storage to Content Delivery Network is based on regular Storage and Data Transfer charges.
No. The data center is selected based on the end users’ network configurations and cannot be controlled by the developer. Users may be served by locations that are preferred by their ISP, or nodes that are "closer" in a logical sense, not necessarily in physical proximity.
Availability of content in Content Delivery Network's local caches (often called "cache efficacy" or "offload") is influenced by multiple factors including:
- Expiration ("max-age") header values
- Overall total size of the developer's content library (how much could be cached)
- Active working set (how much is currently cached)
- Traffic (how much is being served)
- Cache churn (how often are objects being added to cache, or aging out)
For example, a developer with high churn and high traffic has less cache efficacy than other users because objects are swapped in and out more frequently. This incurs higher Storage and Data Transfer charges since more origin requests are required.
To reduce the need to make origin requests, you can make longer max-age headers, allowing Content Delivery Network to hold objects longer.