Distributed Domain Name Translation Nodes in CDNs
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Solution Overview
Problem
Content delivery networks face latency and performance issues due to the limited number and distribution of DNS servers, which slow down domain name resolution and content delivery processes.
Innovation Solution
Implementing a domain name translation node that processes translation messages to identify network addresses and selects content network addresses based on performance correlations, redirecting end users to target cache nodes at different points-of-presence to optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional DNS servers are used for domain name resolution, then domain name translation can be performed, but latency and performance degradation occur due to limited number and distribution of DNS servers
Solution Approach 1:
The patent segments the traditional centralized DNS server system into distributed domain name translation nodes embedded within the CDN network architecture. Each translation node handles domain name resolution locally, eliminating the single-point bottleneck and reducing resolution latency through geographic distribution.
Solution Approach 2:
The patent introduces a new dimensional approach by integrating domain name translation functionality directly into the CDN cache nodes across multiple geographic points of presence. This transforms the resolution process from a vertical hierarchy (end user → DNS server → origin server) to a horizontal distributed network where multiple translation nodes operate in parallel across different geographic dimensions.
2Productivity
If DNS servers are distributed across more locations, then domain name resolution performance improves, but system complexity and infrastructure requirements increase
Solution Approach 1:
The patent merges the domain name translation function with existing CDN cache nodes, eliminating the need for separate DNS server infrastructure. By combining these functions into unified translation nodes, the system achieves distributed resolution capability without proportionally increasing overall infrastructure complexity.
Solution Approach 2:
The translation nodes are designed with multi-functionality, serving as both cache nodes for content delivery and domain name translation nodes for resolution. This universal design allows a single infrastructure element to perform multiple functions, improving productivity without linearly increasing system complexity.
3Reliability
If end users are directed to cache nodes at different points-of-presence, then content delivery performance improves, but routing complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where translation nodes continuously monitor performance metrics of different cache nodes and dynamically adjust routing decisions. This feedback loop enables the system to adapt to changing conditions, maintaining high reliability while the automated decision-making process manages routing complexity.
Solution Approach 2:
The translation node acts as an intermediary between end users and cache nodes, making intelligent routing decisions based on performance correlations. This intermediary function simplifies the overall system by centralizing routing logic at the translation node level, preventing complexity from propagating throughout the entire network.
Data Source
AI summary
Systems, methods, apparatuses, and software for operating content delivery networks are provided herein. In one example, a method of operating a domain name translation node in a first point-of-presence of a content delivery network is presented. The method includes receiving a translation message issued by an end user device for translation of a domain name into a content network address, and processing the translation message to identify a network address of a node that transferred the translation message. The method also includes selecting the content network address based at least in part on correlations between network addresses and performance factors to direct the end user device to a target cache node at a point-of-presence different than the point-of-presence of the domain name translation node, and transferring a response message indicating the content network address which directs the end user device to the target cache node at the second point-of-presence.