GT 3.9.4 Development Release Notes for WS MDS Aggregator

Component Overview

The Aggregator module consists of an Aggregating ServiceGroup framework which supports an extensible plugin architecture.

The Aggregating ServiceGroup framework is designed to facilitate the collecting of information from or about WS-Resources via plugin aggregator sources and the feeding of that information to plugin aggregator sinks.

Resources may be registered to an aggregating ServiceGroup using the ServiceGroup add operation. Each registration will be represented as a ServiceGroupEntry resource. When a registration is made, the appropriate aggregation source and sinks will be informed and aggregated data from the registered resource will begin to flow via the aggregation source into the aggregation sink.

The method of collection by source and processing by the sink is dependent on the particular instantiation of the aggregator.

Feature Summary

Features new in release GT 3.9.4

  • Ported to use WSRF mechanisms (previously used OGSI)
  • Additional sources which collect information by polling and by execution of local scripts
  • Management of aggregations is now performed over the wire through WS ServiceGroup APIs

Other Supported Features

  • Collects information from grid resources using pluggable aggregation sources
  • Delivers collected information to pluggable sinks
  • Manages creation and destruction of individual aggregation registrations

Bug Fixes

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Known Problems

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Technology Dependencies

MDS-Aggregator depends on the following GT components:

  • MDS Service Group
  • MDS UsefulRP

MDS-Aggregator depends on the following 3rd party software:

  • None

Tested Platforms

Tested Platforms for [component name]

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Backward Compatibility Summary

Component compatibility summary fragment template draft: 2 September 2004

Protocol changes since GT version 3.2

  • The aggregator is a complete reimplementation of the MDS3 aggregator using WSRF rather than OGSI protocols.
  • No wireside compatibility with MDS3 aggregator
  • Architectural similarity should make porting straightforward

API changes since GT version 3.2

  • APIs entirely rewritten, so no API compatibility
  • Architectural similarity should make porting straightforward

Exception changes since GT version 3.2

  • see API changes above

Schema changes since GT version 3.2

  • Registration interface uses WSRF rather than OGSI schemas
  • New per-source and per-sink configuration schemas

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