Modeling and evaluation of Software Aging and Rejuvenation (SAR) models beyond the enabling restriction

This repository provides a Java library for modeling and evaluation of Software Aging and Rejuvenation (SAR) models beyond the enabling restriction. The approach is presented in the paper titled "Cost-Effective Software Rejuvenation Combining Time-Based and Condition-Based Policies", authored by Laura Carnevali, Marco Paolieri, Riccardo Reali, Leonardo Scommegna, and Enrico Vicario, submitted to the IEEE Transactions on Emerging Topics in Computing.

Experimental reproducibility

To reproduce experiments illustrated in Sect.3 of the paper:

• Run the main class: "/sar/src/main/java/org/oristool/timebased/results/BestPeriod.java", which evaluates the best period to use for models illustrated in Fig.3
• Run the main class: "/sar/src/main/java/org/oristool/timebased/results/BestPeriodTransient.java", which evaluates the transients illustrated in Fig.5
• Run the python script: "/sar/plots/python_scripts/time_based_plots.py", which will output Fig.4 and Figs.5 in the folder "/sar/plots/figures/timebased"

To reproduce experiments illustrated in Sect.4 of the paper:

• Run the main class: "/sar/src/main/java/org/oristool/conditionbased/ConditionBasedSteadyState.java", which evaluates the steady-state of the interested rewards. The output can be copied in the python file described at the next item.
• Run the python script: "/sar/plots/python_scripts/condition_based_plots.py", which will output Figs.7,8,9,10 in the folder "/sar/plots/figures/conditionbased" Note that evaluation of the transient of Fig.7 is reported as a vector in the script and not read from an external file. The vector values can be evaluated by running "/sar/src/main/java/org/oristool/conditionbased/Rej_n_samples.java"

Attention! Before executing the python scripts, edit the file path string.

Installation

This repository provides a ready-to-use Maven project that you can easily import into an Eclipse workspace to start working with the this library (the version 2.0.0-SNAPSHOT of the Sirio library is included as a Maven dependency). Just follow these steps:

1. Install Java >= 11. For Windows, you can download a package from Oracle; for Linux, you can run apt-get install openjdk-11-jdk; for macOS, you can run brew install --cask java.

2. Download Eclipse. The Eclipse IDE for Java Developers package is sufficient.

3. Clone this project. Inside Eclipse:

   • Select File > Import > Maven > Check out Maven Projects from SCM and click Next.
   • If the SCM URL dropbox is grayed out, click on m2e Marketplace and install m2e-egit. You will have to restart Eclipse.
   • As SCM URL, type: [email protected]:oris-tool/sar.git and click Next and then Finish.

License

This library is released under the GNU Affero General Public License v3.0.