Memory Controller Hash Table for Fast Data Retrieval
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Solution Overview
Problem
Current memory systems face inefficiencies in read operations due to the need to scan through extensive logical block addresses, which prolongs the time required for data retrieval.
Innovation Solution
The implementation of a memory system that generates hash values from logical block addresses during programming and stores them in a hash table, allowing for direct retrieval during read operations by matching hash values, thereby reducing the need to scan all logical block addresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the memory system scans through all logical block addresses during read operations, then it can ensure complete data retrieval, but the read operation time is prolonged
Solution Approach 1:
The system generates hash values from logical block addresses during the program operation and stores them in a hash table before read operations occur. This preliminary action creates an index structure that enables direct access during reads, eliminating the need to scan all logical block addresses while ensuring complete data retrieval through hash value matching.
2Speed
If the memory system stores hash values and their corresponding logical block addresses in a hash table, then direct access during read operations is enabled, but the device complexity increases
Solution Approach 1:
The hash table serves as an intermediary data structure between the logical block addresses and the physical data locations. By introducing this intermediate indexing layer, the system enables direct access through hash value computation and lookup, significantly improving read speed while managing complexity through the use of standard hash table algorithms and structures.
Data Source
AI summary
A memory system includes a memory device configured to store data, and a memory controller configured to perform communication between a host and the memory device and to control the memory device such that, during an operation of programming sequential data, a hash value is generated from logical block addresses of a memory area, to which the sequential data is to be written, and the hash value is stored and such that, during an operation of reading the sequential data, the sequential data is read from the memory area based on the hash value.