SFS: Random Write Considered Harmful in Solid

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SFS: Random Write Considered Harmful in Solid State Drives Changwoo Min1, 2, Kangnyeon Kim1, Hyunjin Cho2, Sang-Won Lee1, Young Ik Eom1 1Sungkyunkwan University, Korea 2Samsung Electronics, Korea Outline Background Design Decisions

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01
SFS: Random Write Considered Harmful in Solid State Drives Changwoo Min1, 2, Kangnyeon Kim1, Hyunjin Cho2, Sang-Won Lee1, Young Ik Eom1

1Sungkyunkwan University, Korea
2Samsung Electronics, Korea<br>
02
Outline Background
Design Decisions
Introduction
Segment Writing
Segment Cleaning
Evaluation
Conclusion 2<br>
03
Flash-based Solid State Drives Solid State Drive (SSD)
A purely electronic device built on NAND flash memory
No mechanical parts

Technical merits
Low access latency
Low power consumption
Shock resistance
Potentially uniform random access speed
Remaining two problems limiting wider deployment of SSDs
Limited life span
Random write performance 3<br>