A
- Aggregator Framework
A software framework used to build services that collect and aggregate data. MDS4 Services (such as the Index and Trigger services) are built on the Aggregator Framework, and are sometimes called Aggregator Services.
- aggregator services
Services that are built on the Aggregator Framework, such as the MDS4 Index Service and Trigger Service.
See Also Aggregator Framework, Index Service, Trigger Service.
- aggregator source
A Java class that implements an interface (defined as part of the Aggregator Framework) to collect XML-formatted data. MDS4 contains three aggregator sources: the query aggregator source, the subscription aggregator source, and the execution aggregator source.
See Also query aggregator source, subscription aggregator source, execution aggregator source.
E
- execution aggregator source
An Aggregator Source (included in MDS4) that executes an administrator-supplied program to collect information and make it available to an Aggregator Service such as the Index Service.
See Also aggregator source.
G
- Ganglia
A cluster monitoring tool. See http://ganglia.sourceforge.net.
H
- Hawkeye
A monitoring service for Condor Pools. See http://www.cs.wisc.edu/condor/hawkeye/.
I
- Index Service
An aggregator service that serves as a registry similar to UDDI, but much more flexible. Indexes collect information and publish that information as WSRF resource properties.
See Also aggregator services.
- information provider
A "helper" software component that collects or formats resource information, for use by an aggregator source or by a WSRF service when creating resource properties.
Q
- query aggregator source
An aggregator source (included in MDS4) that polls a WSRF service for resource property information.
See Also aggregator source.
S
- subscription aggregator source
An aggregator source (included in MDS4) that collects data from a WSRF service via WSRF subscription/notification.
See Also aggregator source.
T
- Trigger Service
An aggregator service that collects information and compares that data against a set of conditions defined in a configuration file. When a condition is met, or triggered, an action takes place, such as emailing a system administrator when the disk space on a server reaches a threshold.
See Also aggregator services.