Welcome to Download Delivery
Download Delivery (DD) can deliver downloads quickly and reliably to users anywhere in the world, in real time or through scheduled downloads.
DD gains stability and performance with options such as:
- Access Control to authenticate and authorize downloads.
- Content Targeting to get the correct download to the user on the basis of language, device type, and other identifiers.
- File transfer optimization through advanced caching and cache key options, tiered distribution, and other technologies.
DD is also built to deliver your progressive media files quickly and reliably to users anywhere in the world. It provides performance, efficiency and stability through "Large File Optimization." This reduces latency and enhances performance when delivering large files. The Bit Rate Limiting optional module provides the ability to throttle the speed in delivering files to the end user so that there is less wasted bandwidth. DD is built on a network of over 150,000 servers in thousands of networks, controlled by network intelligence systems that route requests, balance load, and ensure up-time.
You should be familiar with these terms
If this is the first time you're configuring edge network services, you should read the following table to familiarize yourself with some terms used with the process.
|Content Provider (CP) Code||This is an identifier for a particular subset of content on your Origin Server. Some features are applied individually to particular CP codes. CP codes are also used to provide additional granularity in reports and to track billing. You'll have at least one CP code per contract. Also, a CP code is associated with a single contract.|
|Property Hostname||This is an identifier that
indicates which Property file and product to use when processing incoming HTTP/HTTPS
requests. Often, the Property Hostname is the full, end-user-facing hostname or
fully qualified Domain Name of your application or site. For instance,
|DNS Record||This is a record that associates a Domain Name to an IP address.|
|Edge Hostname||This describes your
customer-specific subdomain on an Edge network domain. It maps incoming requests to
our Edge servers. Typically, you specify Edge hostnames in your Canonical Name
(CNAME) records. You associate your Property hostname with an Edge Hostname in
Property Manager when creating the Property Configuration file for Download Delivery. For example, your site (Property hostname),
|Edge Server||This is a server in the Akamai Edge network that ultimately receives your end-user requests (end user requests to your Property Hostname are redirected to an associated Edge Hostname which resolves to the Edge Server). The Edge Server reads from the Property Configuration tied to the Property Hostname/Edge Hostname association, in order to determine how your site/application is to be delivered (via Rules and Behaviors established within that configuration)|
|Forward HOST Header||The name the Edge Server forwards (often to the Origin Server) in the HTTP Host request header, sometimes also referred to as the expected host. Often, this is the same name as the Property Hostname.|
|Origin Server||The Server where you keep your content to be served to end users (where your site/application resides). Edge servers read from an applicable Property Configuration file to determine Origin Server parameters (that you provide when creating the configuration).|
|Origin-server Hostname||The Hostname that maps to your Origin Server from which Edge Servers retrieve your content. The usual syntax of the Origin-server Hostname is the Property Hostname preceded by “origin” and a hyphen.|
is your Akamai delivery configuration that includes all of the common rules for
processing end-user requests. You can use the Property Manager API or UI application
(via Control Center) to configure
properties used for DD.
Note: Most often, this is simply referred to as your "DD property," but the terms "property configuration file," "property configuration," "configuration," and "configuration file" are used interchangeably to describe this component.