1. Mobile-Agent Scalability
Mobility TIE
Mobile-Agent Scalability
Dartmouth
University of West Florida
Mobile-Agent versus Client-Server Performance
Scalability in an Information Retrieval Task
(Contact: Ron Peterson,
David Kotz, Robert Gray, Ronald Peterson
Dartmouth College
Peter Gerkin, Martin Hofmann
Lockheed Martin
Niranjan Suri, Greg Hall, Paul Groth, Maggie Breedy
University of West Florida
Military Application Scenario
Testbed
Mobile Agent
Mobile information server
Server
Clients in the field
Clients
Scenario
Parameters
The following parameters were varied:
* Number of clients: 1 client to 10 clients
* Network bandwidth shared by all clients to the server: 1, 10, 100Mbps
* Percentage of documents found relevant: 5%, 20%
Fixed document size: 4096 bytes
Fixed query rate: 1 query per 2 seconds per client +/-0.25 queries/second
Comparison of mobile-agent versus client-server implementations of an information retrieval task.
Goal is to reduce bandwidth utilization to be able to service more clients.
Application is useful in low bandwidth environments such as wireless data links where reconfigurability via code distribution is important.
Results
Client-Server
BANDWIDTH
Legend
D’Agents
EMAA
100 Mbps
10 Mbps
1 Mbps
NOMADS
Latency
Client-Server/Mobile-Agent Performance Ratio
Future Work:
Lessons Learned:
Greater number of clients
More bandwidths
More agent systems
Mobile Agent performance scales well
Server design important
Mobile-Agents win at low bandwidth or with more clients
Mobility TIE