Performance Analysis of a Controlled Database Unit Subject to Decision Errors and Control Delays

Abstract

This paper extends the performance analysis of a controlled database unit studied in Wu, Metzler, and Linderman (2005) to include cases in which errors and delays can occur in state-based control actions as a result of uncertainty in the knowledge of the system state. The paper details the ways in which such errors and delays are captured by augmenting the state space in the Markov model of the database unit. State variable feedback is used to activate the process of restoration upon the failure of one of the database servers in the unit. The performance of the database is evaluated in terms of the resulting mean time to unit failure, the steady state availability, the expected response time, and the service overhead of the database unit. All performance measures are examined with respect to the likelihood of decision error and the amount of control action delay.

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Document Details

Document Type
Technical Report
Publication Date
Jul 12, 2006
Accession Number
ADA455227

Entities

People

  • James M. Metzler
  • Mark H. Linderman
  • N. E. Wu

Organizations

  • Binghamton University

Tags

Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Availability
  • Command And Control
  • Databases
  • Electronic Mail
  • Kolmogorov Equations
  • Markov Chains
  • Markov Models
  • Military Research
  • Models
  • New York
  • Probabilistic Models
  • Probability
  • Random Variables
  • Steady State
  • Supervisory Control

Readers

  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Mathematical Modeling and Probability Theory.
  • Team-Based Human-Centered Cognitive Task Decision Making and Information Performance.

Technology Areas

  • Space