Study on Garbage Collection Schemes for Flash-Based Linux Swap System

Author

Ko, Sohyang ; Jun, Seonsoo ; Kim, Kiyong ; Ryu, Yeonseung

Author_Institution

Dept. of Comput. Software, Myongji Univ., Yongin

fYear

2008

fDate

13-15 Dec. 2008

Firstpage

13

Lastpage

16

Abstract

NAND flash memory based SSDs (solid state disks) have become an alternative storage device for future computer systems. Legacy operating system functionalities like file system and virtual memory system should be carefully re-designed since flash memory cannot be overwritten unless erased in advance. In this paper, we study the performance of garbage collection schemes when flash memory is used as the Linux swap storage. We have collected swap I/O traces from Linux kernel and performed trace-driven simulation. We found that Linux swap system must be re-designed in order to use flash memory as swap storage.

Keywords

Linux; NAND circuits; flash memories; operating system kernels; virtual storage; Linux kernel; NAND flash memory; flash-based Linux swap system; garbage collection schemes; operating system functionalities; solid state disks; virtual memory system; Application software; Cleaning; Costs; File systems; Flash memory; Kernel; Linux; Operating systems; Software engineering; Solid state circuits; Flash memory; Garbage collection; linux swap system;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Software Engineering and Its Applications, 2008. ASEA 2008

Conference_Location

Hainan Island

Print_ISBN

978-0-7695-3432-9

Type

conf

DOI

10.1109/ASEA.2008.55

Filename

4721304