GT 3.9.5 Information Services (MDS)
Monitoring and discovery mechanisms are concerned with obtaining, distributing, indexing, archiving, and otherwise processing information about the configuration and state of services and resources. In some cases, the motivation for collecting this information is to enable discovery of services or resources; in other cases, it is to enable monitoring of system status.GT4’s support in its Java, C, and Python WS Core for WSRF and WS-Notification interfaces provides useful building blocks for monitoring and discovery, enabling the definition of properties for which monitoring and discovery is be provided, and subsequent pull- and push-mode access. GT4 services such as GRAM and RFT define appropriate resource properties, providing a basis for service discovery and monitoring. Other GT4 services are designed to enable discovery and monitoring, providing for indexing (MDS-Index) and analysis of data for significant events (MDS-Trigger). Every GT4 container incorporates a built-in MDS-Index service for discovery of services within the container; these MDS-Index services can be linked to build Grid-wide indices.