Here is a quick introduction to get started with PEGASUS. Installation Environment PEGASUS can be run in any machine that supports hadoop, but the shell scripts and code packaging scripts works easily in Linux or Unix machines. PEGASUS needs the following softwares to be installed in the system: • Hadoop 0.20.1 or greater • Apache Ant 1.7.0 or greater • Java 1.6.x or greater, preferably from Sun • Python 2.4.x or greater • Gnuplot 4.2.x or greater Download and Install Installation is as simple as downloading and extracting the installation file. 1. Download the file PEGASUSH-2.0.tar.gz 2. Extract the file by running the following command: tar xvzf PEGASUSH-2.0.tar.gz. Then, the directory 'PEGASUS' will be created. 3. cd PEGASUS Running PEGASUS can be run in one of the two ways: by using an interactive shell `pegasus.sh`, or by running shell scripts for each algorithm. For first-time users, we recommend to use the interactive shell. Advanced users might want to use shell scripts for each algorithm. PEGASUS Interactive Shell 1. Type `pegasus.sh` in the installation directory. The pegasus shell appears. 2. Type `help` for available commands in the shell. 3. Type `demo` to see the demo. The demo first adds a graph file 'catepillar_star.edge' by the name 'catstar' in PEGASUS, computes the inout degree, and generates the degree distribution plot 'catstar_deg_inout.eps'. Running Each Algorithm In the installation directory, type 'make' to see the demo of computing radii and diameter of an example graph using the shell script for running radius algorithm. For details of running PEGASUS, see the PEGASUS user guide PDF file here. Getting Started DOWNLOAD USING PEGASUS PUBLICATIONS ABOUT SCHOOL OF COMPUTER SCIENCE