WS Information Services/MDS3 Documentation

The MDS3 component of the Globus Toolkit Version 3.2 provides information about Grid resources for use in resource discovery, selection, and optimization.  This information is critical to the operation of the Grid and construction of applications.

In the Open Grid Service Architecture (OGSA) on which GT3 is based, everything is represented as a Grid service.  These Grid services can be a static set of persistent services as well as transient services.  There may be one or more instances of a particular Grid service.  Each Grid service expresses its state in a standardized way as Service Data Elements (SDEs).

MDS3 provides the functionality within which Service Data can be collected, aggregated, and queried; data feeds can be monitored; and Service Data can be created dynamically on demand.

The MDS3 component is therefore a broad framework that includes any part of GT3 that generates, registers, indexes, aggregates, subscribes, monitors, queries, or displays Service Data in some way.

WS Information Services/MDS3: Key Concepts

• Overview
• Uses and Benefits of the Index Service
• Information Model
• Queries
• User Interface
• Security
• Related Documents
• WS Index Service Technology Brief (not yet available)

WS Information Services/MDS3: System Administrator's Guide

• Overview
• Configuring the Index Service
• Registering a Resource Service to an Index Service
• Using Service Data Providers
• Testing Service Data Aggregation
• Index Service Configuration File
• Server Configuration File

WS Information Services/MDS3: Developer's Guide

• Overview
• API: Aggregator | Service Data Providers
• WS Service Data Providers
• Web Service Data Browser
• Query Service Data (Xpath)
• Querying Service Data (ogsi-find-service-data)
• Querying Examples
• GLUE schema
• Migrating from Pre-WS to WS: Porting Guide

WS Information Services/MDS3: User's Guide (not yet available)