A hybrid storage system composed of on-the-fly automated storage tiering (OTF-AST) and caching

Kazuichi Oe, Koji Okamura

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

3 Citations (Scopus)

Abstract

In a previous workload study, we found a new type of I/O concentration approximately 6 GB in size that continues for more than 10 minutes and then moves on to another area. We also found that the conventional hybrid storage method, static tiering and caching, is not sufficient for this I/O concentration. The on-the-fly automated storage tiering (OTF-AST) designed for this I/O concentration cannot handle other I/O concentrations well, so we have developed a hybrid storage system composed of both OTF-AST and caching. In the proposed system, the OTF-AST dynamically migrates the new I/O concentration to SSD and the caching handles the other I/O concentrations. Experimental results showed that the hybrid storage system surpasses the basic OTF-AST system with an average response time 27% better for one of a typical samba workload in which read is not predominant and I/O concentration lasts for 20 minutes.

Original languageEnglish
Title of host publicationProceedings - 2014 2nd International Symposium on Computing and Networking, CANDAR 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages406-411
Number of pages6
ISBN (Electronic)9781479941520
DOIs
Publication statusPublished - Feb 27 2015
Event2nd International Symposium on Computing and Networking, CANDAR 2014 - Shizuoka, Japan
Duration: Dec 10 2014Dec 12 2014

Other

Other2nd International Symposium on Computing and Networking, CANDAR 2014
CountryJapan
CityShizuoka
Period12/10/1412/12/14

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications

Cite this

Oe, K., & Okamura, K. (2015). A hybrid storage system composed of on-the-fly automated storage tiering (OTF-AST) and caching. In Proceedings - 2014 2nd International Symposium on Computing and Networking, CANDAR 2014 (pp. 406-411). [7052218] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CANDAR.2014.90