Node Cluster Synchronization via Periodic Lamport Clock Exchange
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Solution Overview
Problem
In distributed services, ensuring state consistency and correct event ordering during recovery from disruptions, such as node failures, is challenging due to unreliable conventional clocks and high network overhead in existing systems like Lamport clocks.
Innovation Solution
Implementing a synchronization logic that periodically requests Lamport clock values from nodes and provides synchronization signals to create a loose ordering of events, using global sequence numbers to determine event order and reduce network overhead by minimizing complex comparisons and tiebreaking processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Lamport clock values are passed with signals between nodes as events occur, then event ordering is achieved, but network overhead increases
Solution Approach 1:
The patent implements periodic synchronization intervals where nodes exchange timing information only at predetermined intervals rather than continuously with every event. This periodic action reduces network overhead while still maintaining sufficient timing accuracy for event ordering during recovery operations.
Solution Approach 2:
The system pre-establishes synchronization intervals and timing thresholds before disruptions occur. By preparing synchronization mechanisms in advance and setting predetermined thresholds for synchronization triggers, the system avoids excessive real-time communication while ensuring event ordering can be reconstructed accurately during recovery.
2Device complexity
If conventional clocks are used for event ordering, then simplicity is maintained, but reliability decreases due to clock divergence across network boundaries
Solution Approach 1:
The patent introduces synchronization intervals as an intermediary mechanism between conventional clocks and event ordering requirements. Rather than relying solely on potentially divergent conventional clocks or implementing complex distributed clock synchronization, the system uses periodic synchronization intervals as a mediator to establish reliable event ordering during recovery while maintaining simplicity in normal operation.
3Measurement precision
If centralized nodes record every event causing state change, then event ordering is ensured, but network overhead increases due to continuous reporting
Solution Approach 1:
Instead of continuous event reporting to centralized nodes, the patent implements periodic synchronization where nodes share timing information at predetermined intervals. This approach maintains accurate event tracking capability while dramatically reducing network overhead by eliminating continuous communication during normal operations.
Solution Approach 2:
The patent extracts only the essential timing information needed for event ordering at predetermined synchronization intervals, rather than transmitting complete event data continuously. This extraction approach maintains event tracking accuracy while minimizing network overhead by sending only necessary synchronization data.
Data Source
AI summary
Systems and methods associated with computing cluster synchronization are disclosed. One example method includes periodically requesting timing values from a set of notes in a computing cluster. The method also includes receiving timing values from members of the set of nodes. The method also includes providing a synchronization value to members of the set of nodes. The synchronization value may be generated based on the timing values. Additionally, the synchronization value may be used to order events across the members.