In high-energy physics,terabyte and soon petabyte-scale data collections are emerging as critical community resources.A new class of "Data Grid" infrastructure is required to support distributed access to and analysis of these datasets by potentially thousands of users.Data Grid technology is being deployed in numerous experiments through collaborationssuch as the EU DataGrid,the Grid Physics Network,and the Particel Physics Data Grid[1],The Globus Toolkit is a widely used set of services designed to support the creation of these Grid infrastrunctures and applications,In this paper we survey the Globus technologies that will play a major role in the development and deployment for these Grids.
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