Empirical study of NVM Storage: An operating system's perspective and implications

Eunji Lee, Hyokyung Bahn, Seunghoon Yoo, Sam H. Noh

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

21 Scopus citations

Abstract

As high performance NVM storage such as PCM and STT-RAM emerge, legacy software layers optimized for HDDs should be revisited. Specifically, as storage performance approaches DRAM performance, existing I/O mechanisms and software configurations should be reassessed. This paper explores the challenges and implications of using NVM storage with a broad range of experiments. We measure the performance of a system with NVM storage emulated by DRAM with proper timing parameters and compare it with that of HDD storage environments under various configurations. Our experimental results show that even with storage as fast as DRAM, the performance gain is not large for read operations as current I/O mechanisms do a good job of hiding the slow performance of HDD. To assess the potential benefit of fast storage media, we change various I/O configurations and perform experiments to quantify the effects of existing I/O mechanisms such as buffer caching, read-ahead, synchronous I/O, direct I/O, block I/O, and byte-addressable I/O on systems with NVM storage. We also investigate some unique performance characteristics of NVM in comparison with HDD by changing the number of accesses and the amount of data to be transferred. We anticipate that our results will provide directions in system software development in presence of ever faster storage devices.

Original languageEnglish
Title of host publicationProceedings - 2014 22nd Annual IEEE International Symposium on Modeling, Analysis and Simulation of Computer, and Telecommunication Systems, MASCOTS 2014
PublisherIEEE Computer Society
Pages405-410
Number of pages6
EditionFebruary
ISBN (Electronic)9781479956104
DOIs
StatePublished - 5 Feb 2015
Event2014 22nd Annual IEEE International Symposium on Modeling, Analysis and Simulation of Computer, and Telecommunication Systems, MASCOTS 2014 - Paris, France
Duration: 9 Sep 201411 Sep 2014

Publication series

NameProceedings - IEEE Computer Society's Annual International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunications Systems, MASCOTS
NumberFebruary
Volume2015-February
ISSN (Print)1526-7539

Conference

Conference2014 22nd Annual IEEE International Symposium on Modeling, Analysis and Simulation of Computer, and Telecommunication Systems, MASCOTS 2014
Country/TerritoryFrance
CityParis
Period9/09/1411/09/14

Keywords

  • buffer caching
  • NVM
  • PCM
  • storage performance
  • STT-RAM

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