Revisiting widely held SSD expectations and rethinking system-level implications

Myoungsoo Jung, Mahmut Kandemir

Research output: Chapter in Book/Report/Conference proceedingConference contribution

40 Citations (Scopus)

Abstract

Storage applications leveraging Solid State Disk (SSD) technology are being widely deployed in diverse computing systems. These applications accelerate system performance by exploiting several SSD-specific characteristics. However, modern SSDs have undergone a dramatic technology and architecture shift in the past few years, which makes widely held assumptions and expectations regarding them highly questionable. The main goal of this paper is to question popular assumptions and expectations regarding SSDs through an extensive experimental analysis using 6 state-of-the-art SSDs from different vendors. Our analysis leads to several conclusions which are either not reported in prior SSD literature, or contradict to current conceptions. For example, we found that SSDs are not biased toward read-intensive workloads in terms of performance and reliability. Specifically, random read performance of SSDs is worse than their sequential and random write performance by 40% and 39% on average, and more importantly, the performance of sequential reads gets significantly worse over time. Further, we found that reads can shorten SSD lifetime more than writes, which is very unfortunate, given the fact that many existing systems/platforms already employ SSDs as read caches or in applications that are highly read intensive. We also performed a comprehensive study to understand the worst-case performance characteristics of our SSDs, and investigated the viability of recently proposed enhancements that are geared towards alleviating the worst-case performance challenges, such as TRIM commands and background-tasks. Lastly, we uncover the overheads brought by these enhancements and their limits, and discuss system-level implications.

Original languageEnglish
Title of host publicationSIGMETRICS 2013 - Proceedings of the 2013 ACM SIGMETRICS International Conference on Measurement and Modeling of Computer Systems
Pages203-216
Number of pages14
Edition1 SPEC. ISS.
DOIs
Publication statusPublished - 2013 Jul 22
Event2013 ACM SIGMETRICS International Conference on Measurement and Modeling of Computer Systems, SIGMETRICS 2013 - Pittsburgh, PA, United States
Duration: 2013 Jun 172013 Jun 21

Publication series

NamePerformance Evaluation Review
Number1 SPEC. ISS.
Volume41
ISSN (Print)0163-5999

Other

Other2013 ACM SIGMETRICS International Conference on Measurement and Modeling of Computer Systems, SIGMETRICS 2013
CountryUnited States
CityPittsburgh, PA
Period13/6/1713/6/21

All Science Journal Classification (ASJC) codes

  • Software
  • Hardware and Architecture
  • Computer Networks and Communications

Cite this

Jung, M., & Kandemir, M. (2013). Revisiting widely held SSD expectations and rethinking system-level implications. In SIGMETRICS 2013 - Proceedings of the 2013 ACM SIGMETRICS International Conference on Measurement and Modeling of Computer Systems (1 SPEC. ISS. ed., pp. 203-216). (Performance Evaluation Review; Vol. 41, No. 1 SPEC. ISS.). https://doi.org/10.1145/2494232.2465548