Directory Content Resolution in Distributed Industrial Control
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Solution Overview
Problem
In industrial control configurations with distributed directories, discrepancies in information across different nodes can lead to inaccurate queries, making it difficult to determine correct information and causing inconsistencies, which can impact the operation and authorization of machinery.
Innovation Solution
A system with a test component and an update component is implemented to evaluate and correct directory information by comparing data across nodes, determining accurate information, and propagating it throughout the directory, ensuring consistency and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If information is propagated across distributed directory nodes, then information availability is improved, but information consistency deteriorates due to discrepancies between nodes
Solution Approach 1:
The system performs preliminary actions by evaluating directory information before it is propagated across nodes. The test component checks information accuracy and identifies discrepancies before propagation occurs, preventing inconsistent data from being distributed throughout the directory structure.
Solution Approach 2:
The update component implements a feedback mechanism that continuously monitors directory information across nodes. When discrepancies are detected, the system generates feedback loops that trigger re-evaluation and correction processes, ensuring information consistency is maintained through continuous verification and updates.
2Measurement precision
If directory information is evaluated and corrected across all nodes, then information accuracy is improved, but system complexity increases
Solution Approach 1:
The system segments the directory evaluation and correction process into distinct functional components: a test component responsible for evaluating information accuracy, and an update component responsible for correcting discrepancies. This segmentation allows each component to specialize in specific tasks, improving information accuracy while managing system complexity through modular architecture.
Data Source
AI summary
In a distributed directory configuration, different nodes can retain information pertinent an industrial control configuration. As information changes in one node, replicas of the information in other nodes can be updated. However, updating can take time and a query can be run upon the directory while nodes have conflicting information. Conflicting information can be identified and resolved such that a query obtains a correct answer.