Towards a Unified Monitoring and Performance Analysis System for the Grid 
Hong-Linh Truong*, Thomas Fahringer**

*Institute for Software Science 
University of Vienna
Liechtensteinstr. 22, A-1090 Vienna, Austria
truong@par.univie.ac.at

**Institute for Computer Science, 
University of Innsbruck 
Technikerstr. 25/7, A-6020 Innsbruck, Austria 
Thomas.Fahringer@uibk.ac.at


In this talk we describe current prototype of SCALEA-G which is a 
unified  monitoring and  performance analysis system for the Grid. We 
introduce the architecture of SCALEA-G based on the Grid Monitoring 
Architecture (GMA). SCALEA-G is being 
implemented as a set of grid services followed the Open Grid Service 
Architecture (OGSA). SCALEA-G provides an infrastructure
 for conducting the online monitoring and performance analysis of a variety of Grid
services including computational and network resources, and Grid applications.
Both push and pull model are supported, providing a great flexible and scalable 
monitoring and performance analysis in the Grid. Source and dynamic 
instrumentation are exploited to perform profiling and tracing of Grid applications.
The performance characteristics are examined and viewed in hierarchical manner, 
allowing to exploit them from local to global. System- and application-specific 
metrics are related as close as possible to easily detect performance problems in 
the Grid. Moreover, SCALEA-G provides interfaces for external tools to access 
not only monitored data but also resulting analyzed data.