SinoCDN
 
Content Delivery Solution
Why Content Delivery Network?
   CDN brings order and quality of service (QoS) to the Internet's IP backbone to eliminate or minimize the infamous "World Wide Wait" phenomenon. Slight network delays or somewhat inconsistent response times go almost unnoticed when the Internet application at hand is text-based email or a static Web page download. In multimedia world of entertainment services, gaming, live video-conferences and streaming broadcasts, which are sensitive to response-time delays, though, extra steps must be taken to ensure delivery of a quality experience.

   CDNs address these stringent response-time demands in large part by minimizing the number of Internet backbone delivery that a request and resulting stream or downloadable content must traverse. One way they do this is by hosting replicas of a developer's content in cache servers called surrogates that are located within network edge points of presence (POPs). The setup enables CDN service providers, in many cases, to deliver content stored in cache servers just one hop away from the user. Hence, it significantly reduces the bandwidth consumption, user latency and increases content delivery performance.

SinoCDN's Content Networking Solution
Content Networking Solution by SinoCDN
   SinoCDN's Content Delivery Network solution takes the Internet to the next level by allowing all organizations to maximize the impact of communicating via the Web by overcoming the modern day bandwidth issues of delivering rich-media. SinoCDN's Content Delivery Networking Solution guarantees that web content, rich audio, quality video and other high bandwidth files can be delivered with speed, accuracy and consistency, thus dramatically increasing the impact of your communication programs. Customers can experience an immediate improvement on the performance, reliability and quality of media streams.

   The Content Networking Solution of SinoCDN consists of 5 components:
Content Management

This is an application level service providing management features for the media content administrators to manage their content delivery. Content providers need a user-friendly tool to manage and automatically publish their content on the network. This component allows content administrators to manage and monitor the content distribution on the network seamlessly. Administrators can broadcast live stream, publish on-demand content, perform content replication, set the content delivering algorithm and broadcasting schedule, etc. through the management tool.

Network Management

Network management is critical to distributed network architectures. It is responsible for managing, real-time monitoring and configuring the whole CDN. Network administrators use the one-piece, easy-to-use web based management tools to administrate and monitor the whole CDN and individual network devices(e.g. ISG). Network Management allows management of bandwidth, configuration of network settings, measurement of performance and usage, etc. This component provides centralilzed provisioning and policy setting for all content edge delivery nodes associated within the CDN.


Content Routing

Since more and more users access media content on the Internet, it becomes more difficult to provide high-quality service from a single location. A method providing service to the end users with the best site response is necessary to handle the heavy traffic. "Content Routing" is the solution to this problem. It ensures that a user is matched and served with the optimal routing path which is formed based on a set of metrics such as latency, server/network loading and topology, enabling accelerated content delivery and adpative routing around failure and congestion. Thus, users experience much better in content response, stream quality and content availability.

 

 
    ActiveRoute technology is a communicaton protocol between ISGs in the CDN. ISGs tell each other their current status (e.g. loading and network status) and available content URLs. The content is then routed from the nearest and best node. Moreover, since the ISGs have the information of neighboring nodes' status, they can intelligently perform load-balancing by getting content from the best (with most available resource) ISG. Thus, a distributed ISG network with ActiveRoute technology enables intelligent content-aware routing and load-balancing feature.
Request Routing

Intelligent request routing technology by MediaDNS, one of SinoCDN's networking products, is used for searching the nearest ISG or server node to the client for performing Global Server Load-Balancing (GSLB) and Local Server Load-Balancing (LSLB). When a user enters the URL of the requesting content, the request is directed to the best and closest ISG or server node by MediaDNS. This redirection can be done using the method of DNS lookup or application level redirect, thus allowing the client to get the content from the best and nearest node based on network/server loading, geographical location and topology.


Application Service

In order to establish a distributed content network for pushing content or services on the edge, application servers like caches, proxies, replicas, splitters and transaction servers, etc. have to be distributed over the network for performing content delivery and distribution. SinoCDN's Content Networking Solution provides this fundamental function by deploying ISGs or third parties' application servers. Since users' requests are satisfied by the relatively best-performaning servers, and content/service distribution is carried out on the last mile of the network,
bandwidth consumption on the WAN is significantly saved with optimal delivery quality achieved.


More on Content Delivery Network:
A Comprehensive Content Distribution and Management Solution For High-Quality Multimedia Delivery
CDN Manager Data Sheet
Media DNS Data Sheet
ISG Data Sheet