Ganglia is a open-source project that grew out of the University of California, Berkeley Millennium Project. Its a scalable distributed monitoring system for high-performance computing systems such as clusters and Grids. It is based on a hierarchical design targeted at federations of clusters. This tutorial will help you make better use of the grid resources available to you. We will look at the use of information services in a grid and discuss the monitoring use of the Ganglia tool kit to enhance the information services already present in the Globus environment.