Abstract
The performance and capacity of solid-state drives (SSDs) are continuously improving to meet the increasing demands of modern data-intensive applications. Unfortunately, communication between the SSD controller and memory chips (e.g., 2D/3D NAND flash chips) is a critical performance bottleneck for many applications. SSDs use a multi-channel shared bus architecture where multiple memory chips connected to the same channel communicate to the SSD controller with only one path. As a result, path conflicts often occur during the servicing of multiple I/O requests, which significantly limits SSD parallelism. It is critical to handle path conflicts well to improve SSD parallelism and performance.
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