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Overview
Service Overview
Global CDN is a service that delivers static content stored on web servers or object storage to users more quickly and securely through numerous edge servers distributed across a global network. It distributes the load of the origin server during traffic spikes to protect the origin server, and by downloading content from nearby edge servers, it can provide users with fast and reliable web services.
Notice
Samsung Cloud Platform’s Global CDN service is provided through the services and infrastructure of the global CDN provider Akamai. Akamai informs that, in accordance with the Information and Communications Network Act, if it receives a list of url suspected of containing illegal information from the Broadcasting and Media Communications Commission, it may take measures to restrict user access to those url.
Features
- Easy CDN Service Use: Through the web-based console of Samsung Cloud Platform, you can conveniently request Global CDN services. You can easily configure Samsung Cloud Platform’s origin server settings and the caching policy of Global CDN edge servers, enabling rapid content delivery service usage.
- Service Availability Improvement: Even when many users request content simultaneously, generating excessive traffic, users can access content quickly without any degradation in usability thanks to edge servers distributed across multiple locations. Therefore, when used for tasks that require reliable global services, it ensures service availability.
- Secure Content Usage: Supports HTTP, HTTPS, and HTTP/2 protocols, enabling content integration with various origin servers. When the cached content’s validity period expires or a validation check confirms changes to the origin content, the edge server’s existing cache is removed. Subsequently, when a user requests content, the new content from the origin server is cached, ensuring the user always receives valid, up-to-date content.
- Efficient Cost Management: Even in work environments that require large-scale traffic, such as downloading massive files, stable service is possible without extensive resource usage. Additionally, Global CDN usage fees are charged only based on content consumption, enabling efficient cost management.
Service Architecture Diagram
Provided features
The Global CDN service provides the following features.
- Original Settings: Set the location and path of the origin server, and by providing built‑in compression for origin content, reduce traffic and improve response speed.
- Caching Settings: Set the cached content delivery policy and cache expiration time, and when the content’s validity period expires (TTL expiration), you can delete (Purge) the expired cached content on the edge server.
- Content Protection: By communicating with the origin server via the HTTPS protocol, the security of the content delivery path is strengthened, and the powerful security features of the Global CDN network can protect content and users from DDoS attacks and web‑based attacks.
Component
Connection between the origin and the global CDN network
| Category | Explanation |
|---|---|
| Original location and path configuration | Based on the main name or IP address, set the origin server’s location, protocol, port number, and file path to connect the origin to the Global CDN network |
| Forward host header | Configure the Host header value that the Global CDN forwards to the user when requesting the origin server. |
| Cache key hostname | Configure cache key information to identify content on the Global CDN Edge server |
| Custom header(request) | Set whether to use custom header |
Table. Connection settings between the origin and the global CDN network
Caching in a Global CDN Network
| Category | description |
|---|---|
| Caching options | Configuring caching options on a global CDN network using the origin server’s Cache-Control and expiration times |
| Content Delivery Policy | Setting a transmission policy based on validity after TTL expiration |
| Cache expiration time | Set expiration time for cached content |
| Detailed policy | Configure usage of Ignore query string, Range request, Custom header |
Table. Caching settings in the global CDN network
Constraints
The constraints of the Global CDN service are as follows.
| Category | description |
|---|---|
| Maximum number of domains that can be created per account | 20 |
Table. Global CDN constraints
Provision status by region
Global CDN is available in the environments listed below.
| Region | Provision status |
|---|---|
| Korea West (kr-west1) | Provided |
| Korea East (kr-east1) | Provided |
| South Korea South 1 (kr-south1) | Not provided |
| South Korea 2 (kr-south2) | Not provided |
| South Korea 3 (kr-south3) | Not provided |
Table. Global CDN Availability by Region
Prior Service
The Global CDN service has no prerequisite services.