Memory Controller Hot Data Migration to SLC Blocks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current memory systems face challenges in quickly and stably processing data from memory devices, particularly in identifying and managing 'hot' data to optimize storage and retrieval operations, leading to potential read disturbances and errors.
Innovation Solution
A memory system and method that utilize a controller to identify 'hot' data based on read count, frequency, and priority, and transfer such data from multi-level cell (MLC) to single level cell (SLC) memory blocks for improved durability and speed, ensuring stable and efficient data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data is stored in MLC memory blocks, then storage capacity is improved, but read speed and durability deteriorate
Solution Approach 1:
The memory system divides data into hot data and cold data, storing hot data in SLC memory blocks and cold data in MLC memory blocks. This segmentation allows the system to optimize read speed for frequently accessed data while maintaining high storage capacity in MLC blocks, resolving the contradiction between storage capacity and read speed.
Solution Approach 2:
Different storage locations (SLC vs MLC memory blocks) are assigned different data types based on access patterns. SLC blocks provide fast read access for hot data, while MLC blocks provide high capacity for cold data. This local quality differentiation resolves the speed-capacity contradiction by matching storage characteristics to data requirements.
2Ease of operation
If data is frequently read from MLC memory blocks, then data accessibility is improved, but read disturbances and errors increase
Solution Approach 1:
The system extracts hot data from MLC memory blocks and relocates it to SLC memory blocks. This extraction removes frequently accessed data from the MLC environment where read disturbances occur, thereby maintaining data accessibility while preventing read disturbances and errors in the MLC blocks.
Solution Approach 2:
SLC memory blocks serve as an intermediary for hot data, providing a buffer between the host and MLC blocks. This intermediary protects MLC blocks from excessive read operations by handling frequent access requests in SLC, thus maintaining reliability while preserving accessibility.
3Speed
If hot data is identified and transferred to SLC memory blocks, then read speed is improved, but system complexity increases
Solution Approach 1:
The system implements a feedback mechanism that monitors read counts and access patterns to identify hot data. This feedback drives the automatic migration of hot data from MLC to SLC blocks, enabling the system to adapt to changing access patterns and maintain optimal read speed without manual intervention, thereby managing complexity through automation.
Solution Approach 2:
The memory system performs self-service by automatically identifying hot data and migrating it to appropriate storage locations. This self-service capability reduces the need for external management and simplifies operation, offsetting the internal complexity with automated decision-making and data management.
Data Source
AI summary
A memory system includes a memory device including memory blocks, each of the memory blocks including pages, each of the pages including memory cells that are electrically coupled to word lines, wherein the memory cells store data that is requested from a host; and a controller suitable for reading first data corresponding to a read command received from the host, from a page of a first memory block among the memory blocks, storing the first data in a buffer, providing the first data stored in the buffer, to the host, and writing and storing the first data stored in the buffer, in a page of a second memory block among the memory blocks.