Memory Controller Overlap Write Mode for Lower Write Amplification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing data storage apparatuses face inefficiencies in writing and reading data due to overlapping logical addresses in sequential write requests, leading to increased write amplification factors and deteriorated performance.
Innovation Solution
A memory controller with an overlap write manager that detects overlapping logical addresses in adjacent write requests and defers programming of data for overlapping addresses, enabling an overlap write mode to reduce write amplification by optimizing data write operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is written for all logical addresses in sequential write requests, then data integrity is maintained, but write amplification increases and performance deteriorates
Solution Approach 1:
The memory controller performs preliminary detection of overlapping logical addresses in sequential write requests before executing write operations. By identifying overlap patterns in advance, the controller can selectively defer redundant writes while maintaining data integrity, thus improving write performance without compromising reliability
Solution Approach 2:
The system dynamically changes the write operation parameter based on detected address overlap patterns. When overlaps are detected, the write operation is modified to skip redundant addresses; when no overlaps exist, normal write operations proceed. This adaptive parameter adjustment resolves the contradiction between maintaining data integrity and improving write performance
2Reliability
If write operations are performed for all logical addresses, then data completeness is ensured, but write amplification factor increases
Solution Approach 1:
The memory controller extracts and identifies redundant write operations caused by overlapping logical addresses in sequential write requests. By separating the useful write operations from the redundant ones, the system executes only necessary writes, thereby ensuring data completeness while reducing write amplification
Solution Approach 2:
The system converts the potentially harmful effect of overlapping write requests (which causes write amplification) into a beneficial detection opportunity. By detecting the overlap pattern, the controller intelligently skips redundant writes, transforming what would be wasted write operations into performance improvements while maintaining data completeness
3Productivity
If overlapping logical addresses are detected and write operations are optimized, then write performance improves, but device complexity increases
Solution Approach 1:
The memory controller performs self-service by autonomously detecting overlapping logical addresses and adjusting write operations without external intervention. This self-managing capability improves write performance through intelligent optimization while the complexity is contained within the controller's existing architecture, minimizing additional system-level complexity
Data Source
AI summary
A data storage apparatus includes a memory device and a memory controller. The memory controller is configured to determine that at least a portion of logical addresses included in adjacent write requests in a sequence of write requests continuously received from an external apparatus overlaps. The memory controller is configured to execute an overlap write mode in which deferring programming of data of an overlapping logical address.