Master System Classifies Write Data for Distributed Storage
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Solution Overview
Problem
Current memory systems face challenges in efficiently distributing and managing write data across multiple nonvolatile memory devices, particularly in ensuring transaction integrity and handling sudden power-offs, which complicates data recovery and storage operations.
Innovation Solution
A data processing system that includes a master system and multiple nonvolatile memory devices, where the master system classifies and distributes write data into transactions, determines device roles based on capacity and overwrite capabilities, and performs specific storage and recovery operations to ensure data integrity and efficient distribution across the devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If write data is stored in a single memory device, then data integrity is easier to manage, but storage capacity and redundancy are limited
Solution Approach 1:
The patent divides the storage system into multiple memory devices (first nonvolatile memory device, second nonvolatile memory device, and third nonvolatile memory device) and segments write data into different categories (transactional write data and non-transactional write data). Transactional write data is distributed across multiple devices to enable redundancy and capacity expansion, while non-transactional write data is stored in a dedicated device. This segmentation allows the system to achieve both data integrity through distribution and enhanced storage capacity.
2Quantity of substance
If transactional write data is distributed across multiple memory devices, then storage capacity and redundancy are improved, but data management complexity increases
Solution Approach 1:
The patent introduces a master system as an intermediary component that receives write data from the host, classifies it into transactional and non-transactional categories, and manages the distribution to appropriate slave systems. The master system maintains a mapping relationship between transactional write data and corresponding slave systems, simplifying the data management process. This intermediary structure reduces the complexity that would otherwise arise from directly managing distributed storage across multiple devices.
3Reliability
If all write data is stored in nonvolatile memory devices, then data persistence is improved, but handling of sudden power-offs and data recovery becomes more complex
Solution Approach 1:
The patent segments write data into transactional and non-transactional categories, storing non-transactional write data in a dedicated third nonvolatile memory device that is not subject to overwriting restrictions. This segmentation allows the system to maintain data persistence while simplifying recovery operations, as non-transactional data provides a stable baseline that can be used for recovery without the complexity of managing transactional states across multiple devices.
4Adaptability or versatility
If memory devices are classified based on overwrite capability, then data storage flexibility is improved, but system configuration complexity increases
Solution Approach 1:
The master system serves as an intermediary that handles the classification of memory devices based on their overwrite capabilities. It receives information about device characteristics (such as whether a device can be overwritten) and automatically determines the appropriate slave system assignments. This intermediary approach abstracts the configuration complexity from the data storage operations, allowing the system to maintain flexibility in device selection while keeping the configuration process centralized and simplified.
Data Source
AI summary
A data processing system includes first memory system including a first nonvolatile memory device; a second memory system including a second nonvolatile memory device; and a master system including a third nonvolatile memory device. The master system classifies any one of the first memory system and the second memory system as a first slave system and the other as a second slave system depending on a predetermined reference, wherein the master system is coupled to a host, and includes a write buffer for temporarily storing a plurality of write data, and wherein the master system classifies the write data, into first write data grouped into a transaction and second write data which are not grouped into the transaction, stores the second write data in the third nonvolatile memory device, and stores the first write data in the first nonvolatile memory device or the second nonvolatile memory device.