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Interposing Flash between Disk and DRAM to Save Energy for Streaming Workloads

Mohammed G. Khatib, Berend-Jan van der Zwaag, Pieter H. Hartel, Gerard J. M. Smit

Onderzoeksoutput: Contribution to conference proceedingAcademicpeer review

Samenvatting

In computer systems, the storage hierarchy, composed of a disk drive and a DRAM, is responsible for a large portion of the total energy consumed. This work studies the energy merit of interposing flash memory as a streaming buffer between the disk drive and the DRAM. Doing so, we extend the spin-off period of the disk drive and cut down on the DRAM capacity at the cost of (extra) flash. We study two different streaming applications: mobile multimedia players and media servers. Our simulated results show that for light workloads, a system with a flash as a buffer between the disk and the DRAM consumes up to 40% less energy than the same system without a flash buffer. For heavy workloads savings of at least 30% are possible. We also address the wearout of flash and present a simple solution to extend its lifetime. © 2007 IEEE.
Originele taal-2English
TitelProceedings of the 2007 IEEE/ACM/IFIP Workshop on Embedded Systems for Real-Time Multimedia
SubtitelESTIMedia 2007
UitgeverijInstitute of Electrical and Electronics Engineers
Pagina's7-12
Aantal pagina's6
ISBN van geprinte versie978-1-4244-1654-7
DOI's
StatusPublished - 5 nov. 2007
Extern gepubliceerdJa
EvenementIEEE/ACM/IFIP Workshop on Embedded Systems for Real-Time Multimedia - Salzburg, Australia
Duur: 4 okt. 20075 okt. 2007

Workshop

WorkshopIEEE/ACM/IFIP Workshop on Embedded Systems for Real-Time Multimedia
Land/RegioAustralia
StadSalzburg
Periode4/10/075/10/07

Keywords

  • harde schijf
  • DRAM
  • energie besparen

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