Configuration Management for Multi-Agent Systems via …配置管理的多Agent系统通过…

Launch Agent
Launch Status
It is possible to launch agent and non-agent components with RECoMa.
RECoMa Facilitates Monitoring and Control of MAS Applications
Conclusions
• RECoMa Provides for the User:
– Control of RETSINA agents, non-RETSINA agents, non-agent components – Centralized control, from any computer, of a distributed environment – Control across heterogeneous platforms (e.g. any Unix; any Windows) – Knowledge and control of a dynamically-changing computing environment – GUI to facilitate intuitive resolution of agent-computer allocation – GUI to track allocations of agents to applications and to resources – Ad hoc specification of host, agent, and application profiles
RECoMa Architecture
RECoMa Server RECoMa Server
XML
XML Discovery
RECoMa Client RECoMa Server
RECoMa Server
• One per computer • Loaded during host computer's startup • Provides a profile of host computer's resources • Announces itself and host computer via SSDP alive packets • Acts on requests to launch agents via platform-specific
RECoMa Application Profile
Instantiates agents, on host computers, for a specific MAS application.
RECoMa helps to manage MAS Applications
The user can see the applications for which an agent is being used. • Allows startup/shutdown of all agents for an application. • If agent is being used for multiple applications, only the
• Individual agent / component profiles can be edited from RECoMa client • Agent profile specifies type of execution environment
• Example: jdk1.2.2 green threads; or X11R6; or linux.ld.so.114a • RECoMa client determines where to find resources on the host computer
Research Problems Addressed
• The Connection Problem:
– Given: Open, dynamic, heterogeneous, networked computing environment – Find: The computer with the resources that match the agent's requirements – Solve: via dynamic service discovery and agent matchmaking techniques
commands
RECoMa Client
One per user
Loaded whenever / wherever needed
RECoMa Order Independence for Startup and Discovery
RECoMa Client
RECoMa Server
ANS Server
RECoMa Host Profile
A host profile is provided by the RECoMa Server for its host
• Host profiles can contain arbitrary descriptions of their platforms • Host profiles contain host computer-specific descriptions • Examples: operating system, file locations, libraries locations, etc.
• RECoMa Design Validates the Importance of MAS Discovery:
– Provides up-to-date knowledge about available computing platforms – Reduces the number of launch-time parameters required by agents – Eliminates need for many launch-order dependencies
• Desiderata from the Agent Administrator's Perspective:
– Single Point of Control – Distributed Points of Control: control from any computer – Uniform Control of Different Agent Systems (e.g. RETSINA, OAA, Grid) – Uniform Control of Non-Agent Components
The Robotics Institute Carnegie Mellon University 5000 Forbes Avenue
Pittsburgh, PA 15213-3890 (USA) cs.cmu.edu/~{garof, ojuarez, katia, softagents}
This research has been sponsored in part by DARPA Grant F-30602-98-2-0138 and the Office of Naval Research Grant N-00014-96-16-1-1222.
Matchmaker
Search Request Search Response
Search Request Search Response
Search Request Search Response
Search Alive
Leabharlann Baidu
Search Alive
Search Alive
Agent Selection
RECoMa Agent Profile
Encodes platform-independent host requirements for the agent • Examples: operating system; language; shared libraries • Does not encode the specific instances, such as filename paths Encodes application-independent dependency requirements • Examples: requires that a non-discoverable ANS be running • Does not specify that a particular ANS instance be running
• Difficulties of Managing Change:
– Heterogeneous Operating Environments – Different: operating systems, computer languages, device characteristics – Availability, Load, Resource Limits of the Hosting Computer – Runtime status of the agents
RECoMa can discover any SSDP-enabled SW component in the discovery area:
• RETSINA: ANSs, Matchmakers, Logging & Visualization Facilities, SSDP-enabled Agents • Jini / DARPA Grid: LUSs, SSDP-enabled Agents • Windows Millenium: SSDP-enabled Services
• Example: jdk1.2.2 on midea found in /usr/home/java/jdk1.2.2
Machine Selection
Visually illustrates allocation constraints • Given a computer, show the agents / components that can it run • Given an agent, show the computers on which it can be run
Configuration Management for Multi-Agent Systems via RECoMA: The RETSINA Configuration Manager
Joseph A. Giampapa Octavio H. Juarez-Espinosa
Katia P. Sycara
reference to the application being terminated is removed.
RECoMa Agent / Component Launch Sequence
RECoMa Client
Launch Request
RECoMa Server
Agent / Component
RECoMa Implements FIPA Agent Control Language
• Agent control language is optional for agents under RECoMa management. • RECoMa FIPA Control Language Wrapper for agents / components that do not implement FIPA CL.