MobileAgent Scalability

1
Mobile-Agent Scalability
Mobile-Agent versus Client-Server Performance
Scalability in an Information Retrieval Task
(Contact Ron Peterson, rapjr_at_cs.dartmouth.edu)
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
Server
Mobile information 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.

Client-Server
Results
BANDWIDTH
Legend
DAgents
EMAA
100 Mbps
10 Mbps
1 Mbps
NOMADS
Latency
Client-Server/Mobile-Agent Performance Ratio
Lessons Learned
Future Work

• 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