8. Service Architecture Grid Fabric Site Site Site Resource Selector Info Collector Info Gatherer Match Making User Interface User Interface Submission Global Job Queue Grid Client Submission User Interface User Interface Global DH Services SAM Naming Server SAM Log Server Resource Optimizer SAM DB Server RC MetaData Catalog Bookkeeping Service SAM Stager(s) SAM Station (+other servs) Data Handling Worker Nodes Grid Gateway Grid/Fabric Interface JIM Advertise Local Job Handling Cluster AAA Dist.FS Info Manager XML DB server Site Conf. Glob/Loc JID map ... Info Providers MDS MSS Cache Site Web Serv Grid Monitoring User Tools Flow of: job data meta-data