1. Department of Computer Science University of Warwick
Dynamic Application Integration Using Agent-Based Operational Administration
Junwei Cao
Darren J. Kerbyson
Graham R. Nudd
Department of Computer Science
University of Warwick

2. Operational Administration Agents
Broker
Agent
Application: Clients and Servers
Broker
OOA
Client
Server ……

3. Three-Tier Capability Model
L_ACT (Local Agent Capability Table)
G_ACT (Global Agent Capability Table)
LG_ACT (Local Global Agent Capability Table)
Broker
OOA
Client
Server ……

4. Dynamic Application Integration
When a server is changed, only the LG_ACT of its agent is informed.
When an agent can not find the service information in either L_ACT or LG_ACT, it detects that a change must have occurred. It can ask the broker for help, and modify the LG_ACT. B A C S ……

5. A Case Study
C1 wants the identity of S3, which just moved from the A2 to A3. B A1 A2 A3 C1 C2 S2 S3 ……

6. Performance Analysis n is the number of the agents in the system.
Let T be the cycle time the LG_ACTs are updated.
Suppose the moved server can receive lT requests during T.
If n>>lT, unicasting is more efficient.
If n<<lT, multicasting is more efficient. B A C S ……

7. Scalability Hierarchical Model (Adown *)this  Adown (s)
(null, Aanother)this  Aanother(s)
(null, null)this  Aup(s)
(null, Athis)this  error B C A

8. Future Works Modeling and Simulation Tools
Java or C/C++ Implementation
Applications