Sequential Read Relocation for SSD Write Performance
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Solution Overview
Problem
Data storage devices face performance degradation due to maintenance and garbage collection operations being triggered during read or write operations, which consume resources and time, impacting efficiency.
Innovation Solution
A controller in the data storage device determines if a read operation is sequential and executes relocation operations based on priority, optimizing performance by performing these operations during available resource times, such as idle periods or sequential reads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If maintenance and garbage collection operations are performed when parameters are met (low valid count or outdated data), then memory reliability is improved, but device performance deteriorates due to resource consumption during read/write operations
Solution Approach 1:
The controller identifies and executes relocation operations during sequential read operations before they would interfere with write operations. By performing maintenance tasks during the sequential read window, the system prepares memory resources in advance, ensuring that write operations can proceed without interruption or performance degradation.
Solution Approach 2:
The controller dynamically adjusts its operation schedule by detecting sequential read patterns and temporarily prioritizing relocation operations during these periods. This dynamic resource allocation allows the system to adapt maintenance scheduling to current workload conditions, preventing performance degradation during critical write operations while maintaining memory reliability.
2Productivity
If relocation operations are executed during idle times, then write performance is improved by avoiding interruptions, but the complexity of operation scheduling increases
Solution Approach 1:
The controller implements a feedback mechanism that monitors operation patterns and dynamically identifies sequential read periods as suitable windows for relocation operations. This feedback-driven approach automatically adapts the scheduling of maintenance tasks based on actual device usage patterns, improving write performance without requiring complex manual scheduling configurations.
Data Source
AI summary
A data storage device includes a non-volatile memory device including a memory block including a number of memory dies, and a controller coupled to the non-volatile memory device. A read command is received from an external device and the controller determines whether a read operation associated with the read command is a sequential read operation. One or more relocation operations are performed in response to determining that the read operation is a sequential read operation. The one or more relocation operations are executed in an order based on a priority associated with each of the one or more relocation operations.