Parallel DNS Resolution System for Expired Cache Entries

The patent segments the DNS resolution process into multiple parallel paths by querying multiple DNS forwarders/resolvers simultaneously. Each forwarder/resolver handles a portion of the resolution task independently, and the system aggregates their responses to determine the final resolution result, thereby reducing overall resolution time while maintaining manageable system complexity through modular architecture

The patent merges multiple DNS forwarders/resolvers into a unified resolution system that operates concurrently. By combining the capabilities of multiple DNS servers and coordinating their responses, the system achieves faster resolution times while presenting a single integrated interface to applications, effectively merging complexity into a managed unified system

The patent transforms the static serial recursive process into a dynamic parallel process where multiple DNS queries are initiated simultaneously across different forwarders and resolvers. The system dynamically coordinates these parallel queries and integrates their responses, adapting the resolution path based on response timing and validity, thereby achieving faster resolution while managing process complexity through dynamic coordination mechanisms

The patent maintains continuous useful action by overlapping DNS query operations that would traditionally execute sequentially. Multiple recursive queries are launched in parallel and their processing continues concurrently, ensuring that computational resources remain actively engaged throughout the resolution process rather than idle between sequential operations, thus reducing total resolution time while maintaining implementable process structure

The patent performs preliminary validation of cache entries by checking their status against multiple DNS forwarders/resolvers in parallel before they are needed for resolution. This advance validation ensures that only valid cache entries are used, maintaining high reliability while the parallel nature of the validation process minimizes the time penalty, as the validation occurs concurrently with other DNS operations

The patent implements feedback mechanisms where responses from multiple DNS forwarders/resolvers are continuously monitored and used to validate cache entries. The system receives feedback from parallel queries about cache entry validity and dynamically adjusts its resolution strategy, ensuring reliable use of cached data while minimizing validation time through intelligent feedback-driven decision making

The patent enables each DNS forwarder and resolver to autonomously handle its own query processing and response generation without requiring complex centralized coordination. Each server independently manages its query queue and response timing, and the system aggregates these self-service responses to determine the final resolution, thereby achieving parallel speedup while minimizing coordination complexity through decentralized autonomous operation

The patent changes the operational parameters of the DNS query system by adjusting timeout values, query priorities, and response selection criteria to optimize parallel query performance. By dynamically modifying these parameters based on system conditions and response patterns, the system achieves fast parallel resolution while managing complexity through parameter-based control rather than complex structural coordination