Table of Contents
The Aggregator Framework is the software framework on which WS MDS services (currently, the Index, Trigger and Archive Services) are built. The Aggregator Framework collects data from an aggregator source and sends that data to an aggregator sink for processing. Aggregator sources distributed with the Globus Toolkit include modules that query service data, acquire data through subscription/notification, and execute programs to generate data. Aggregator sinks include modules that implement the Index, Trigger and Archive Services interfaces.
Features new in release GT 4.2.1
- The mds-servicegroup-add command no longer requires the -s or -e arguments
- The mds-set-multiple-termination-time command has been created to aid in lifetime management of service group entry resources created via mds-servicegroup-add
Other Supported Features
- Collects information from grid resources using pluggable aggregation sources which collect information by polling, subscription, and by execution of local scripts.
- Delivers collected information to pluggable information sinks.
- Management of individual aggregations is now performed over the wire through WS ServiceGroup APIs.
- The QueryAggregatorSource and SubscriptionAggregatorSource now attempt to detect when the data source EPR is local to the current container instance, and if so set the connection properties to use local transport.
- Added a service level configuration option for suppressing the publication of aggregator configuration elements in aggregator service group registry entries. In other words, the Service Group "Content" Resource Property will contain only the aggregated data.
The following problems and limitations are known to exist for WS MDS Aggregator Framework at the time of the 4.2.1 release:
Aggregator Framework depends on the following GT components:
- Java WS Core
Aggregator Framework depends on the following 3rd party software:
- None
The Aggregator framework is completely backward compatible with the version included in GT 4.2.0.
Protocol changes since GT version 4.0
- The Aggregator Framework is affected by the Java WS Core protocol changes (see the Java WS Core Release Notes for details)
API changes since GT version 4.0
- None. Aggregator sources and execution information providers written for GT version 4.0 should continue to work in this version.
Schema changes since GT version 4.0
- See the Java WS Core Release Notes.
Associated standards for WS MDS Aggregator Framework:
- WS-ResourceProperties (WSRF-RP)
- WS-ResourceLifetime (WSRF-RL)
- WS-ServiceGroup (WSRF-SG)
- WS-BaseNotification
- WS-Topics
See Aggregator Framework for more information about this component.