Disks are like snowflakes: no two are alike

Authors:
Elie Krevat;Joseph Tucek;Gregory R. Ganger
Affiliations:
Carnegie Mellon University;HP Labs;Carnegie Mellon University
Venue:
HotOS'13 Proceedings of the 13th USENIX conference on Hot topics in operating systems
Year:
2011

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Abstract

Gone are the days of homogeneous sets of disks. Even disks of a given batch, of the same make and model, will have significantly different bandwidths. This paper describes the disk technology trends responsible for the now-inherent heterogeneity of multi-disk systems and disk-based clusters, provides measurements quantifying it, and discusses its implications for system designers.