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Glossary

A

aggregator services

Services that are built on the Aggregator Framework, such as the MDS4 Index Service and 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.

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.

G

Ganglia

A cluster monitoring tool (re: MDS4). See http://ganglia.sourceforge.net.

H

Hawkeye

A monitoring service for Condor Pools. See http://www.cs.wisc.edu/condor/hawkeye/.

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