Memory Controller Address Mapping for Consistent Write Throughput
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Solution Overview
Problem
Existing data storage devices face challenges in maintaining consistent write performance across varying workloads due to address mapping inefficiencies, particularly when logic addresses are not uniformly distributed, leading to inconsistent throughput and performance.
Innovation Solution
A data storage device with a memory controller that extracts a key value from a modified logic address, generates an index based on this key value, and maps it to a physical address, ensuring random distribution and efficient storage management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If address translation is performed using conventional mapping methods, then data can be stored and retrieved, but write performance becomes inconsistent under varying workload types due to non-uniform logic address distribution
Solution Approach 1:
The patent changes the parameter of address mapping by extracting key values from modified logic addresses and using these key values to generate indices for mapping to physical addresses. This transformation of the addressing parameter ensures uniform distribution of write operations across memory regions regardless of the original logic address pattern, thereby maintaining consistent write performance under varying workload types
Solution Approach 2:
The patent introduces an intermediary key value that acts as a mediator between the logic address and physical address. The key value is extracted from the modified logic address and used to generate an index that maps to the physical address. This intermediary transformation layer ensures that non-uniform logic address distribution does not directly translate to non-uniform physical address access patterns, maintaining performance consistency
2Productivity
If logic addresses are directly mapped to physical addresses without modification, then mapping is simple, but data distribution across memory regions becomes non-uniform leading to performance degradation
Solution Approach 1:
The patent segments the logic address into a modified logic address from which a key value is extracted. This segmentation allows the system to use only the necessary key value portion for generating the mapping index, achieving uniform data distribution while keeping the mapping process manageable through structured breakdown of the address components
Solution Approach 2:
The patent transforms the one-dimensional logic address into a multi-dimensional mapping process by generating a modified logic address, extracting a key value, and using it to create an index that maps to the physical address. This dimensional transformation ensures uniform data distribution across memory regions while maintaining a systematic and manageable mapping complexity through structured address transformation
Data Source
AI summary
A data storage device may include a memory device and a memory controller. The memory controller is configured to extract a key value from a modified logic address, and map, to a physical address of the memory device, an index generated based on the modified logic address and the key value.