Cache Refresh with a Single Indicator for Peak Load Control
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Solution Overview
Problem
Caching data in computer systems leads to resource usage spikes during peak hours due to stale data refresh, which is costly and complex to manage, especially for daily users accessing systems at the same time.
Innovation Solution
Implement a single refresh indicator to proactively refresh cached data during non-peak times, using a method that includes setting the indicator to 'true' upon user access, refreshing data during off-peak hours, and resetting it after refresh, thus ensuring data availability without resource spikes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cache refresh happens on demand when data becomes stale, then data freshness is maintained, but resource usage spikes during peak hours
Solution Approach 1:
The system performs cache refresh in advance during non-peak hours by setting a refresh indicator when data is accessed, then automatically refreshing the cache during off-peak times before the next peak usage period. This preliminary action prevents the resource spike that would occur if refresh waited until data became stale during peak hours.
2Reliability
If automatic refresh is implemented to prevent stale data, then data freshness is improved, but system complexity and cost increase
Solution Approach 1:
The system extracts only the essential refresh indicator flag from the cache data structure, separating the refresh management logic from the main data storage. This minimal extraction allows automatic refresh functionality without requiring complex tracking systems, counters, or additional metadata structures that would increase system complexity.
3Power
If pro-active refresh is implemented to spread resource usage, then peak load is reduced, but tracking complexity increases
Solution Approach 1:
The cache data structure serves itself by including an embedded refresh indicator that automatically triggers the refresh process. The system uses the cache's own state (the indicator flag) to manage its own refresh timing, eliminating the need for external tracking systems, counters, or complex scheduling mechanisms.
Data Source
AI summary
The present disclosure relates generally to computer systems and, more particularly, to a cache refresh system and related processes and methods of use. The method of refreshing data in cache memory includes: setting, by a computer system, a refresh indicator to “true”; refreshing data in the cache memory, by the computer system, upon a determination that the refresh indicator is set to “true”; and setting, by the computer system, the refresh indicator to “false” after the refreshing of the cache memory.