UNIVERSITY OF MASSACHUSETTS
Department of Electrical and Computer Engineering

ECE 655: Fault Tolerant Computing
USAN software

• 1.Where can I get the USAN software?
  • ftp to euler.ecs.umass.edu
  • filename: usan.tar.Z
  • manual file: manual.pdf/manual.ps
  • To install the software (see appendix A)
  • Uncompress and tar the uncompressed file
  • Modify several environment variables in the resource file such as .tcshrc:
    • PATH
    • MANPATH
    • CPU
    • USAN
    • USAN_PROJECT
• 2. How do I run it directly on euler.ecs.umass.edu ?
  • telnet to euler.ecs.umass.edu
  • type in xhost + in your local computer (Your local computer system must support X-windows.)
  • type in usan in euler.ecs.umass.edu
• 3. The procedure to run the software:
  • Create a project
  • Create one or several subnets
  • Connect subnets to form a complete project
  • Define Performance variables
  • Create studies and experiments
  • Solve the model
    • Select the study and experiments
    • Do Reduced Base Model Generator
    • Choose suitable solver
      • Steady state solver
      • Transient Solver
    • Reporter Generator
• 4. Duplex System
  Two processors break down at rates l1,l2 and are repaired at rates m1, m2. The system is up when both processors work properly.