GMA+ -- A GMA-based Monitoring and Management Infrastructure for Grid Chuan He 1 , Zhihui Du, Sanli Li 1 Grid Research Group, Department of Computer Science and Technology, Tsinghua University, Beijing, China hechuan97@mails.tsinghua.edu.cn Abstract. In this paper, we investigate many monitoring and management tools in Grid and other distributed systems. After focusing on the advantage and disadvantage of GMA (Grid Monitoring Architecture), we propose a new monitoring and management schema for Grid --GMA+. In GMA+, we add a close loop feedback structure to GMA and provides interfaces which match Grid Service standards for all its components and defines metadata for monitoring events. It is a novel infrastructure for Grid monitoring and management with highly modularity, usability and scalability. 1 Introduction Nowadays, single PC and even HPCs can not satisfy the explosive need of high performance computing. It needs to connect various heterogeneous resources which are distributed in physical location with high speed network to solve some huge problems. Grid 1 is the extension of traditional distributed computing technology, it waves resources in LAN or WAN and constructs dynamic VO(Virtual Organization) to implement secure and coordinated sharing of resources between persons, organizations and resources. The target of Grid monitoring and management is monitoring resources in Grid for fault detection, performance analysis, performance tuning, load balancing and scheduling. Compared with traditional distributed systems, Grid is more complicated in architecture, larger in scale and more distributed in physical location. So it is more urgent to construct a monitoring and management system with high performance, high scalability and high stabilization to do automatic management in Grid environment. 2 Related works There have already been many monitoring tools in traditional distributed systems. However, those existing tools can not completely meet the needs of Grid monitoring and management.