When to use Content Delivery Network

CDN provides Adatum with many features that will ensure that the services can scale globally to meet emergency services demand during monitored natural disasters. CDN helps Adatum meet its needs in the following way:

CDN assists with large scaling to better handle instantaneous high loads. This functionality is useful for Adatum as it will ensure that emergency services are able to access imagery as a disaster unfolds and will minimize the chance that Adatum’s services become unavailable during a disaster.

CDN resources can be deployed in locations close to new customers as those customers subscribe to the service. Instead of deploying new IaaS VMs to host catastrophe imagery around the world, Adatum can configure a new POP in a location close to where the new customers are.

CDN allows content to be delivered to POPs that are close to where customers need to access that data. Adatum can ensure that a POP in Australia is populated with imagery related to an unfolding catastrophe in Australia whilst a separate POP in South American can be populated with imagery related to events unfolding there. The traffic related to each region’s POP can also be geo-filtered to ensure that data at the Australian POP isn’t accessible to clients from outside the region, reducing the likelihood that demand will make the service unavailable.


When not to use CDN

CDNs are typically best suited to technologies that employ many large static files such as photographic imagery. CDNs are most useful where you need the ability to serve files to a large number of simultaneous users worldwide, which is appropriate for Adatum as natural disasters don’t occur according to predictable patterns. If Adatum’s content was more dynamic, such as providing a service where satellite video was being streamed directly from Adatum servers, CDN wouldn’t provide significant advantages. This is because real-time live streaming doesn’t benefit substantially from being cached in locations around the world in the way that static files, including pre-recorded video files, would.