RESAR: Reliable Storage at Exabyte Scale

Appeared in PrProceedings of the Twenty-fourth International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS 2016).

Abstract

Large-scale disk-based storage systems need to protect the data stored in them against individual disk failures, common component failures and latent disk errors. We present RESAR, a layout scheme that provides two failure tolerance by only using XOR operations to calculate parity data. Our layout has the same write overhead as that of a disk array whose layout is based on virtual RAID Level 6 disk arrays. If the size of a reliability stripe is k, our write overhead is 2/k. We show that RESAR is actually more resilient than the RAID Level 6 layout.

Publication date:
September 2016

Authors:
Thomas Schwarz
Ahmed Amer
Thomas Kroeger
Ethan L. Miller
Darrell D. E. Long
Jehan-François Pâris

Projects:
Reliable Storage

Available media

Full paper text: PDF

Bibtex entry

@inproceedings{MASCOTS-Schwarz-2016,
  author       = {Thomas Schwarz and Ahmed Amer and Thomas Kroeger and Ethan L. Miller and Darrell D. E. Long and Jehan-François Pâris},
  title        = {{RESAR}: Reliable Storage at Exabyte Scale},
  booktitle    = {PrProceedings of the Twenty-fourth International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS 2016)},
  month        = sep,
  year         = {2016},
}