On Correlated Failures in Survivable Storage Systems

Abstract

The design of survivable storage systems involves inherent trade-offs among properties such as performance, security, and availability. A toolbox of simple and accurate models of these properties allows a designer to make informed decisions. This report focuses on availability modeling. We describe two ways of extending the classic model of availability with a single "correlation parameter " to accommodate correlated failures. We evaluate the efficacy of the models by comparing their results with real measurements. We also show the use of the models as design decision tools: we analyze the effects of availability and correlation on the ordering of data distribution schemes and we investigate the placement of related files.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2002
Accession Number
ADA461303

Entities

People

  • Chenxi Wang
  • Gregory R. Ganger
  • Jay J. Wylie
  • Mehmet Bakkaloglu

Organizations

  • Carnegie Mellon University

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Accuracy
  • Binomials
  • Coding
  • Computer Science
  • Computers
  • Cryptography
  • Data Analysis
  • Decoding
  • Directories
  • Fault Tolerance
  • Fault Tolerant Computing
  • Measurement
  • Networks
  • Operating Systems
  • Probability
  • Software Development
  • Statistics

Fields of Study

  • Computer science

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Logistics and Supply Chain Management.
  • Systems Analysis and Design