Dynamic Memory Wear Leveling via Data Attribute Detection
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Solution Overview
Problem
Existing memory systems face challenges in efficiently determining the attributes of data stored in memory blocks, leading to operational complexity and performance degradation, particularly in dynamically adjusting the time point for attribute determination and wear leveling operations based on user data usage patterns.
Innovation Solution
A memory system with a controller that dynamically determines the attribute of data stored in memory blocks by adjusting the operating period and threshold criteria, performing wear leveling operations to optimize memory block usage and extend the lifespan of the memory system based on data access patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wear leveling operations are performed frequently to extend memory system lifespan, then reliability is improved, but device complexity and operational overhead increase
Solution Approach 1:
The patent implements dynamic adjustment of the operating period for wear leveling operations based on the determined attribute of data. When hot data is detected, the operating period is extended to delay wear leveling operations, reducing operational complexity while still maintaining reliability through targeted operations during extended periods. This dynamic approach allows the system to adapt wear leveling frequency to actual data characteristics rather than using fixed intervals.
2Measurement precision
If data attribute determination is performed continuously to improve accuracy, then measurement precision is improved, but use of energy and operational complexity increase
Solution Approach 1:
The patent implements periodic determination of data attributes at predetermined time points rather than continuous monitoring. The controller determines whether stored data is hot or cold data at specific intervals, which reduces energy consumption compared to continuous determination while still maintaining sufficient accuracy for wear leveling decisions. This periodic approach balances measurement precision with energy efficiency.
3Productivity
If operating period for wear leveling is extended to reduce operations, then productivity is improved, but reliability may deteriorate due to delayed operations
Solution Approach 1:
The patent applies different operating periods for wear leveling operations based on the local quality of stored data. When hot data is detected in a memory block, the operating period is extended to delay wear leveling operations. When cold data is detected, the operating period remains at the predetermined interval, ensuring timely wear leveling operations. This localized approach allows the system to optimize operational efficiency for hot data while maintaining reliability for cold data.
Data Source
AI summary
A memory system includes a memory device including a plurality of memory blocks capable of storing data, and a controller configured to determine an attribute of data stored in a memory block during an operating period. A duration of the operating period is changeable based on a parameter regarding the plurality of memory blocks. The duration of the operating period is adjusted in order to increase the accuracy of a determination of a usage pattern regarding the memory device.