OGM comprises of a number of components including:

• OGM-Agent for deployment with the OMII-UK Server or alongside it on the resources to be managed
• A standards-based schema to communicate management information with the middleware registry
• OGM-Server to expose persistent registry capabilities (using GRIMOIRES) via a suite of standards-based Web Services
• OGM-Browser to provide a web-based management interface to provide a graphical representation of the real-time state of resources in the Grid

The above figure illustrates the OGM architecture. The OGM Server is deployed into a hosting environment, such as a servlet container or the OMII-UK Server, and is responsible for reporting the management information to a registry such as UDDI or GRIMOIRES.

OGM is based on a software component called Grid Manager developed at the Belfast e-Science Centre (BeSC). Grid Manager monitors the state of resources and nodes in a Grid defined here as web services running within distributed hosting environments.

The OGM-Agent is deployed onto each node and is responsible for monitoring its state and reporting this to a centralised monitoring service (i.e. the OGM-Server). The OGM-Server collects management information from nodes in the deployed Grid and persists this is a registry. Analysis of the individual and collective state of nodes can determine the performance of a Grid and enable management activities to respond in an efficient manner. For example, if the Grid is performing poorly, OGM should identify the nodes which are contributing to the poor performance and enable corrective action.

The OGM Browser presents a graphical representation of the state of the Grid. Potential exists to enhance service discovery and brokering mechanisms through the real-time analysis of the persistent information.