Redundant System Dynamic Switchover Data Loss Prevention
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Solution Overview
Problem
Existing redundancy systems face challenges in minimizing data loss during switchover between primary and secondary data centers, as current techniques lack differentiated control mechanisms for various switchover reasons, potentially leading to increased data loss due to uniform switchover processes.
Innovation Solution
A redundant system with a primary and secondary data center configuration, where each center includes multiple nodes that synchronize and transfer data update information through intra- and inter-system paths, enabling the secondary system to perform takeover processing based on the latest data updates from either path, thereby minimizing data loss during switchover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the secondary data center takes over processing as a substitution for the primary data center, then system reliability is improved, but data loss increases due to uniform switchover control regardless of switchover reasons
Solution Approach 1:
The patent implements dynamic switchover control that adapts to different switchover reasons (failure vs. maintenance). When failure is detected, the system performs rapid switchover to minimize downtime. When maintenance is scheduled, the system performs gradual switchover to minimize data loss. This dynamic adaptation resolves the contradiction by making the switchover process flexible rather than uniform.
Solution Approach 2:
The system changes the switchover parameters based on the detected reason. For failure scenarios, it uses failure switchover parameters that prioritize speed. For maintenance scenarios, it uses maintenance switchover parameters that prioritize data synchronization. This parameter change approach allows the system to optimize for different objectives depending on the situation.
2Reliability
If data update information is transferred through multiple paths (intra-system and inter-system), then data synchronization reliability is improved, but system complexity increases
Solution Approach 1:
The patent segments the data transfer system into two distinct paths: intra-system transfer path (within the same data center) and inter-system transfer path (between data centers). Each path has dedicated transfer mechanisms and protocols. This segmentation allows the system to manage complexity by dividing the transfer function into manageable, independent components while ensuring redundancy through multiple paths.
Solution Approach 2:
The secondary data center acts as an intermediary that receives data update information from both the primary data center (via inter-system path) and from its own primary node (via intra-system path). This intermediary structure allows the system to compare and reconcile data from multiple sources, improving synchronization reliability while managing complexity through a clear hierarchical relationship.
3Measurement precision
If the secondary system uses both intra-system and inter-system transfer paths for data updates, then data accuracy is improved, but information processing time increases
Solution Approach 1:
The system performs preliminary data transfer through the faster intra-system path while simultaneously receiving data through the inter-system path. By having the secondary system's primary node already synchronized with its own master node before the switchover is initiated, the system reduces the processing time needed after switchover, thus minimizing data accuracy loss without excessive processing time.
Solution Approach 2:
The system implements feedback mechanisms that monitor the synchronization status from both transfer paths. When data accuracy is confirmed through feedback from the intra-system path, the system can proceed with switchover. The feedback loop allows the system to verify data accuracy efficiently without excessive processing time by continuously monitoring rather than performing exhaustive checks.
Data Source
AI summary
A redundant system includes a primary system including a first node and a second node, and a secondary system including a third node and a fourth node. When the secondary system in place of the primary system operates, the fourth node executes first takeover processing or second takeover processing, the first takeover processing taking over the primary system on the basis of data update information acquired from either a second inter-system transfer path or a second intra-system transfer path, and the second takeover processing taking over the primary system on the basis of both the data update information acquired from the second inter-system transfer path and the data update information acquired from the second intra-system transfer path.