System Performance Issues in Flash-Based Solid-State Drives

In this report, we study the performance of solid-state drives that employ flash technology as storage medium. Our aim is to understand how the main performance measures, throughput and latency, are affected by the system parameters and design choices, in particular the garbage-collection mechanism and the priority scheme used for scheduling the various functions performed by a flash die. We observe and explain the occurrence of SSD-specific phenomena, such as latency spikes, and suggest techniques to avoid them.

By: W. Bux

Published in: RZ3801 in 2011


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