Rendezvous Optimization in Content Delivery Networks
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Solution Overview
Problem
Content delivery networks (CDNs) face challenges in optimizing content delivery processes, particularly in efficiently managing content distribution, caching, and request processing, which can lead to delays and increased load on origin servers.
Innovation Solution
The implementation of a CDN framework that includes a rendezvous optimization system, which utilizes service instances, machines, and service interactions to efficiently process requests, cache content, and distribute information across a network of interconnected services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional content delivery processes are used, then content distribution can be maintained, but delays increase and load on origin servers increases
Solution Approach 1:
The patent implements preliminary action by pre-fetching and caching content at edge servers before actual user requests arrive. The system predicts which content will be requested and prepares it in advance at distributed caching nodes, eliminating the need to retrieve content from origin servers when requests occur, thus reducing request processing delays while maintaining efficient content distribution
Solution Approach 2:
The patent introduces edge servers as intermediary nodes between origin servers and end users. These intermediaries cache content locally and serve requests directly from their caches, reducing the load on origin servers and minimizing delivery delays. The intermediary layer acts as a buffer that handles most requests locally while only forwarding new or uncached content to origin servers
2Speed
If content is cached at multiple locations, then delivery speed improves, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the CDN system into hierarchical layers: origin servers, edge servers, and end users. Each segment has specific responsibilities - origin servers handle content creation and initial caching, edge servers handle local caching and request fulfillment, and the coordination between them is managed through standardized interfaces. This segmentation allows content to be cached at multiple locations (improving speed) while managing complexity through clear division of responsibilities
Solution Approach 2:
The patent implements universality by designing edge servers with multi-functional capabilities. These servers can cache content, serve requests, predict future content needs, and coordinate with both origin servers and other edge servers through a unified framework. This multi-functionality allows the system to achieve fast content delivery through distributed caching while managing complexity through a standardized, versatile server design that can handle multiple tasks
3Reliability
If origin servers handle all requests, then content accuracy is maintained, but server load increases
Solution Approach 1:
The patent uses edge servers as intermediaries that cache content from origin servers and serve requests locally. This maintains content accuracy because edge servers receive content directly from origin servers through controlled synchronization mechanisms, while simultaneously reducing origin server load by handling most requests locally without requiring origin server involvement for every request
4Productivity
If distributed caching is implemented, then delivery efficiency improves, but coordination overhead increases
Solution Approach 1:
The patent segments the caching system into origin servers and edge servers with clearly defined roles. Origin servers are responsible for content creation and initial caching, while edge servers handle local caching and request fulfillment. This segmentation improves delivery efficiency through distributed caching while managing coordination complexity by establishing clear boundaries and standardized interaction protocols between segments
Data Source
AI summary
A computer-implemented method in a content delivery (CD) network includes determining at least one pseudo client IP address using first log information and second log information. The first log information being from a rendezvous service in the content delivery (CD) network, and includes at least one resolver IP address associated with at least one first request made at the rendezvous service. The second log information is from at least one probe service in the CD network, and includes at least one client IP address associated with at least one second request to the at least one probe service. The method also includes making an association between (i) the at least one pseudo client IP address and (ii) the at least one resolver IP address; and then, responsive to a name resolution request, the name resolution request including the at least one resolver IP address, the rendezvous service using the at least one pseudo client IP address instead of the resolver IP address to resolve the name.