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Journal Articles ACM SIGBED Review Year : 2012

On Benchmarking Embedded Linux Flash File Systems

Pierre Olivier
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Eric Senn

Abstract

Due to its attractive characteristics in terms of performance, weight and power consumption, NAND flash memory became the main non volatile memory (NVM) in embedded systems. Those NVMs also present some specific characteristics/constraints: good but asymmetric I/O performance, limited lifetime, write/erase granularity asymmetry, etc. Those peculiarities are either managed in hardware for flash disks (SSDs, SD cards, USB sticks, etc.) or in software for raw embedded flash chips. When managed in software, flash algorithms and structures are implemented in a specific flash file system (FFS). In this paper, we present a performance study of the most widely used FFSs in embedded Linux: JFFS2, UBIFS,and YAFFS. We show some very particular behaviors and large performance disparities for tested FFS operations such as mounting, copying, and searching file trees, compression, etc.
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Dates and versions

hal-00725008 , version 1 (23-08-2012)

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Pierre Olivier, Jalil Boukhobza, Eric Senn. On Benchmarking Embedded Linux Flash File Systems. ACM SIGBED Review, 2012, 9 (2), pp.43-47. ⟨hal-00725008⟩
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