UNIVERSITY OF MASSACHUSETTS
Department of Electrical and Computer Engineering

ECE 655: Fault Tolerant Computing
Möbius software

• 1.Where can I get the Möbius software?
  • ftp to euler.ecs.umass.edu
  • Change directory to Mobius_backup, i.e., ftp> cd Mobius_backup
  • Download INSTALL.TXT or INSTALL.html, i.e., ftp>bin; ftp> get INSTALL.TXT
  • For Windows 98/Me/NT/2000/XP (or Solaris 2.7, RedHat Linux 6.2) download Mobius-1.2.1-package.tar
  • Follow the instructions in INSTALL.TXT or INSTALL.html, e.g., untar the uncompressed file using 'tar -xvf' on Unix, or 'winzip' on Windows
  • There is no manual for Mobius, but the previous version software, USAN, has a manual. You can download the Manual file from ~/Manual/manual.pdf or ~/Manual/manual.ps by
    • ftp to euler.ecs.umass.edu
    • Change directory to Manual, i.e., ftp> cd Manual
    • ftp> bin
    • get manual.pdf
    • bye
  • The procedure to run the software:
    • - Create a project
    • - Create one or several Atomics by using SAN Model (Atomic and submodel in Mobius is same as subnet in USAN)
    • - Connect subnets to form a complete project
    • - Define Performance variables
    • - Create studies and experiments
    • - Solve the model
    • * Select the study and experiments
    • * Choose suitable solver
    • @ Steady state solver or @ Transient Solver
    • 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.
• 2. Frequently asked questions:
  • Q1. I have been trying to install Mobius, but whenever the java installation script asks me for the MinGW directory, I provide it with the directory (in my case "C:\MinGW") and the programs gives me the following error "Please enter a new location for MinGW".
  • A1. The Mobius installer seems to be checking the version of MinGW & Cygwin. If you use MinGW & Cygwin from mobius-utils-windows.tar or mobius-utils-unix.tar, this error message will disappear.
  • Q2. HW3 requires using Mobius and plotting results but I can't see how to plot anything.
  • A2. USAN supported plotting function by using GNUPlot, but Mobius doesn't support plotting. You have to use other plotting software such as Microsoft Excel or GNUPlot.
  • Q3. I'm trying to download the Mobius software from euler.ecs.umass.edu using anonymous login. However, the connection to ftp site is getting timed out.
  • A3. The server, euler.ecs.umass.edu, doesn't support anonymous ftp. Please use the predefined username and password. If you don't know them send a mail to jjang@ecs.umass.edu.
  • Q4. The FTP server allows me to login using the ID/Password, but it gives me timeouts whenever I try to download or even try to view directory listings.
  • A4. Please use "sftp" instead of "ftp". If you are out of UMASS network, you should have to use "sftp". This may can solve your problem.
  • Q5. I am using the Windows version of Mobius. The software version is: 1.2.1. I installed the latest cygwin and mgwin from respective web sites. But this combination results in some compile errors, is it ok?
  • A5. Please, use cygwin & Mgwin from mobius-util-windows.tar. When I tested Mobius, there was some kind of version problem. If you use other version of cygwin & Mgwin, I can't guarantee the functionality of Mobius. Please, donwload mobius-util-window.tar from sftp://euler.ecs.umass.edu (userid ece655, obtain password from the instructor).
• 3. Mobius-How-To-Run (pdf file, prepared by Jinwook Jang).
• 4. The Mobius web page at UIUC.
• 5. You may contact the mobius user group at mobius-users@yahoogroups.com.