A job monitoring system for the lcg computing grid

hsnr.de physik.uni-wuppertal.de Experience with generating simulation data of high energy physics experiments has shown that a job moni-toring system (JMS) is essential to understand failures of jobs within the Grid. Such a system can give in-formation about the status of the user job as well as the worker node in parallel while a user job is run-ning. It should support the user directly by allowing the user to interact with the running job and should be able to make an automatic error correction. Further-more, such a system can be extended for an automatic classification of errors which can improve the stability and performance of the Grid environment. To increase the acceptance of the Grid, a graphical user interface (GUI) has been developed and integrated with the job monitoring system. Both components are currently in-tegrated in the computing environment for generating data for the DØ Experiment. In this paper we want to describe the basic components of the job monitoring software.