Memory Controller Data Map for Multi-Plane Garbage Collection
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Solution Overview
Problem
Current storage devices face inefficiencies in garbage collection operations due to the lack of optimized methods for simultaneously reading and managing data chunks across multiple memory planes, leading to suboptimal performance and speed.
Innovation Solution
A memory controller is introduced that generates a data map to identify valid data chunks, determines a read sequence based on simultaneous read operations, and provides read commands to efficiently read and store data chunks across multiple memory planes, improving garbage collection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If data chunks are read sequentially from multiple memory planes, then the control complexity is reduced, but the garbage collection operation speed deteriorates
Solution Approach 1:
The patent applies preliminary action by generating a data map before the garbage collection operation to identify and record the locations of all valid data chunks across multiple memory planes. This pre-organization of data location information enables the memory controller to efficiently plan and execute simultaneous read operations from multiple planes without increasing control complexity during the actual garbage collection process.
Solution Approach 2:
The patent utilizes another dimension by implementing simultaneous read operations across multiple memory planes (adding a spatial dimension to the read operation). Instead of reading data chunks sequentially from one plane at a time, the system reads from multiple planes in parallel, thereby increasing garbage collection speed while the data map maintains manageable control complexity.
2Speed
If multiple memory blocks are simultaneously operated, then the garbage collection speed is improved, but the data management complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the data management task into two distinct parts: (1) the data map generator that identifies and records valid data chunk locations, and (2) the read sequence determinator that uses this pre-organized information to coordinate simultaneous reads from multiple memory blocks. This segmentation allows multiple memory blocks to be operated simultaneously while keeping data management complexity manageable through the structured data map.
Solution Approach 2:
The data map serves as an intermediary structure between the memory controller and multiple memory blocks. It consolidates location information from multiple planes and blocks into a single organized data structure, which the read sequence determinator then uses to coordinate simultaneous operations. This intermediary simplifies the complexity of managing multiple simultaneously operated memory blocks.
3Productivity
If valid data chunks are identified and prioritized for reading, then the garbage collection efficiency is improved, but the initial processing time increases
Solution Approach 1:
The patent applies preliminary action by performing the data identification and location mapping before the actual garbage collection operation. The data map generator proactively scans and records all valid data chunk locations across memory planes in advance, so that during garbage collection, the system can immediately proceed with efficient simultaneous reads without spending additional time identifying data locations during the operation itself.
Solution Approach 2:
The data map structure serves as a cushioning mechanism that stores pre-processed location information, buffering the system against the need to perform complex data identification during garbage collection. This beforehand preparation cushions the initial processing time by organizing data location information in advance, allowing the subsequent garbage collection to proceed efficiently with prioritized reading of valid data chunks.
Data Source
AI summary
A memory controller may control a memory device, which includes two or more planes each including a plurality of memory blocks, which are capable of being simultaneously operated, wherein each of two or more memory blocks in different planes, among the two or more planes, stores a plurality of data chunks. The memory controller may include a data map generator configured to generate a data map indicating locations of stored valid data chunks, among the plurality of data chunks, a read sequence determinator configured to determine a read sequence in which the valid data chunks are to be read based on the data map, and a command input controller configured to provide a read command for the valid data chunks to the memory device based on the read sequence.