Fingerprint Tree Caching for Thin Client Video Metadata
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Solution Overview
Problem
Cloud-based video application architectures face performance bottlenecks due to communication limitations between application servers and thin clients, particularly in managing and controlling responses, which can lead to increased network load and reduced user interface performance when handling millions of clients.
Innovation Solution
Implementing a targeted, structured, granular caching process involving the generation, delivery, and management of response fingerprint trees between the application server and thin client, using algorithms like the Rabin fingerprint algorithm to identify and update responses efficiently, thereby reducing data flow and improving UI performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full responses are transmitted between application server and thin clients, then data accuracy is maintained, but network load increases significantly
Solution Approach 1:
The patent extracts only the differential portions of data that have changed between responses, rather than transmitting complete responses. The response comparator identifies and transmits only the differences (additions, deletions, modifications) between the current response and previously cached response, significantly reducing network load while maintaining data accuracy for updated content.
Solution Approach 2:
The patent segments the response data into identifiable components and changes (additions, deletions, modifications). By breaking down the response into discrete change elements rather than transmitting the entire response, the system reduces network bandwidth consumption while ensuring accurate delivery of all necessary updates to the thin client cache.
2Productivity
If complete responses are cached and updated on thin clients, then UI performance is maintained, but communication overhead between server and clients increases
Solution Approach 1:
The system extracts and transmits only the differential changes between responses rather than complete responses. The response comparator identifies what has changed (additions, deletions, modifications) and sends only those differences to the thin client, reducing communication overhead while maintaining up-to-date caching for improved UI performance.
Solution Approach 2:
The thin client pre-caches complete responses from the application server. When subsequent requests are made, the client can serve cached content immediately without waiting for server responses, improving UI performance. The differential update mechanism then efficiently refreshes the cache with minimal communication overhead.
3Quantity of substance
If fingerprint trees are used to track response differences, then bandwidth usage is optimized, but processing complexity increases
Solution Approach 1:
The patent creates fingerprint trees that are structural copies or representations of the response data hierarchy. These fingerprint trees serve as simplified models that track the structure and content of responses, enabling efficient comparison of differential changes without processing the entire response data, thus optimizing bandwidth usage while managing processing complexity through abstraction.
Data Source
AI summary
A client device may send a first request and then receive, in response to sending the first request, a first response and a first fingerprint tree corresponding to the first response. Next, the client device may cache the first response and the first fingerprint tree corresponding to the first response. Then the client device may send a second request and the first fingerprint tree and then receive, in response to sending the second request and the first fingerprint tree, a final second response and a final second fingerprint tree. The final second fingerprint tree may comprise a difference between the first fingerprint tree and an initial second fingerprint tree and the final second response may comprise a difference between the first response and an initial second response. The client device may update the cached first response with the final second response and the cached first fingerprint tree with the final second fingerprint tree.