Generational Queue for Guaranteed Work Item Processing
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Solution Overview
Problem
In messaging systems, ensuring that all work items are processed is challenging due to potential work item loss, especially when processors send items to multiple modules, leading to uncertainty about completed processing and high costs for implementing guaranteed delivery across all modules.
Innovation Solution
A generational queue operation that centralizes detection and reprocessing using a work item-specific data structure, tracking items with timestamps and generation indications to select the next item for processing, allowing for adaptive reprocessing and reducing overhead by not relying on specialized mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If specialized work item mechanisms are used to ensure guaranteed delivery, then reliability of work item processing is improved, but device complexity and overhead increase
Solution Approach 1:
The patent introduces a generational queue as an intermediary data structure between work item producers and consumers. This queue maintains generation counters and timestamps for each work item, enabling centralized tracking of processing progress without requiring complex specialized mechanisms at each processing node. The generational queue acts as a mediator that coordinates delivery guarantees across multiple modules while keeping individual component complexity low.
Solution Approach 2:
The generational queue serves multiple functions simultaneously: it acts as a work item buffer, a progress tracker, a delivery guarantee mechanism, and a reprocessing coordinator. By consolidating these functions into a single universal data structure, the system avoids the complexity of implementing separate specialized mechanisms for each function, thereby improving reliability without proportionally increasing device complexity.
2Reliability
If guaranteed delivery mechanisms are implemented across all modules, then work item loss is prevented, but processing overhead and resource consumption increase
Solution Approach 1:
The system implements guaranteed delivery tracking only where necessary - specifically maintaining generation counters and timestamps in the central queue, rather than implementing full guaranteed delivery mechanisms across all processing modules. This partial action approach provides the necessary delivery guarantees while avoiding the excessive overhead of universal implementation across the entire system.
Solution Approach 2:
The generational queue automatically tracks processing progress through its internal generation counters and timestamps, eliminating the need for external tracking mechanisms or persistent storage access for each work item. The queue self-manages the delivery guarantee information, reducing processing overhead by avoiding constant access to external storage systems.
3Reliability
If work items are reprocessed to ensure delivery, then reliability is improved, but productivity decreases due to redundant processing
Solution Approach 1:
The generational queue implements feedback mechanisms through generation counters that track how many times each work item has been processed. When a work item is successfully processed, the system can query the queue to check its generation counter and determine whether reprocessing is necessary. This feedback loop ensures reliable delivery while avoiding redundant reprocessing of already-completed items, thereby maintaining productivity.
Solution Approach 2:
The system performs preliminary checks of the generational queue before initiating reprocessing operations. By checking the generation counter and timestamp information in advance, the system can determine whether a work item actually requires reprocessing or has already been successfully processed. This preliminary action prevents unnecessary reprocessing and preserves processing throughput while still ensuring reliable delivery.
4Loss of information
If centralized tracking is implemented, then work item progress visibility is improved, but device complexity increases
Solution Approach 1:
The patent merges work item storage, progress tracking, and delivery guarantee information into a single generational queue data structure. Instead of maintaining separate tracking systems, the queue combines all these functions by embedding generation counters and timestamps directly within the work item entries. This merging approach provides comprehensive progress visibility while minimizing device complexity by eliminating redundant separate tracking components.
Data Source
AI summary
A system, method, and computer-readable medium are disclosed for performing a work item queuing operation. The work item queuing operation includes sending a work item from a producer to a processor; adding the work item to a generational queue upon sending the work item from the producer to the processor via a push operation; and, resending the work item from the producer to the processor via a pop operation when the work item is not processed by the processor, the work item queuing operation centralizing detection and reprocessing of items that were not processed due to work item loss.