Agent Management 652

12 April 2023 Agent management 1

Agent managementLIFE CYCLE & LOG STRUCTUREYUOSEF M. RADI

Research for CS 652Dr. FATHI AL-BORAEI


Outline

Introduction.Introduction. Agent management. Life cycle. Mobile agent life state log structure. Storage method. Proposal. Question. Reference.


Introduction

An agent is created on a certain agent server and it will run autonomously.

Each agent has a life cycle, and each agent has several different life states during entire lifetime.


Introduction

The mobile agent migrates among agent servers as needed to execute given tasks using different services provided by individual servers.

After accomplishing its given tasks, mobile agent terminates. A “common ground” between these agents needs to be

available to enable agent coordination.


Outline

Introduction.

Agent management system.Agent management system. Agent Platform.Agent Platform.

FIBA standard.FIBA standard. Grasshopper standard.Grasshopper standard.

Life cycle. Mobile agent life state log structure. Storage method. Proposal. Question. Reference.


Agent Platform

FIBA standard AMS (Agent management Agent management

systemsystem) is recognized to be an important part of an agent platform.

Only one AMS will exist in a single AP.

Agent Platform

Message Transport System

Agent Platform Security Manager

Agent Management&

Directory Facilitator

Agent Application


Agent Platform

The AMS is responsible for: managing the operation of an AP, such as:

creation, deletion and migration of agents to and from the AP.

Maintained an agent life cycle. understand the life cycle model for which an agent has

been designed.


Agent Platform

Grasshopper standard: Management Service: allow

the monitoring and control of agents and places

create, remove, suspend and resume agents, services, and places.

get information about specific agents and services.

list all agents residing in a specific place, and to list all places of an agency.


Outline

Introduction. Agent management.

Life cycle.Life cycle. Life cycle definition.Life cycle definition. Life cycle in different technology.Life cycle in different technology. Life cycle model.Life cycle model. Life cycle states.Life cycle states.

Mobile agent life state log structure. Storage method. Proposal. Question. Reference.


Life cycle definition

An agent life cycle can be defined as: A series of stages through which an agent passes during its lifetime.

An agent’s state can be used to provide coordination mechanisms with useful status information.


Life cycle in different technology FIPA agents can be in one of the following states:

Initiated. After creation, the agent is said to be in the initiated state.

Active. After invoking the agent, it is active. The central state of a FIPA agent is the so-called active state. After moving into another state, agents always return to the

active state before additional state transitions are possible. Transit.

the move function failed on the original AP. the agent was successfully started on the destination AP

Suspended.


Life cycle in different technology Pathfinder model consists of the following

states and transitions between them: Stopped. Running. Suspended. Aborted. Completed.


Life cycle in different technology MASIF includes the following functions:

Creation. Termination. Suspension. Transfer. Resumption.


Life cycle model

Life cycle model as presented in the following research paper: Supporting Life Cycle Coordination in Open Agent

Systems


Life cycle model

life cycle models are used by mobile management systems to:

Monitor the state of agents. Control agent-state changes.

The basic life states are:1. Suspending

the agent can not run and still stay within the agent server.

2. Activatedrunning and able to perform actions.

3. Migratingtravelling between two server.

Migration

Suspend

Activated

Creation Termination

Arr

ival

Departure

Run

Finish

Term

inati

on


Life cycle model

From an agent’s perspective, the most important state is the active state, in which it can perform its tasks.

From a management perspective, the suspended state is the most important state.

Why? A management system can perform actions on the agent

without interfering with its tasks. Security chicks on agent when it’s arrive to see if agent are

carrying stolen or harm data.


Outline

Introduction. Agent management. Life cycle.

Mobile agent life state log Mobile agent life state log structure.structure.

Storage method. Proposal. Question. Reference.


Mobile agent life state log structure During its life cycle, a mobile agent may go

through many states, In order to improve the mobile agent management, we have to record these states.

The mobile agent life state log structure is described as a four-items: Life_State_Log_Structure=

(Agentld, State-Type, Time, Place)


Mobile agent life state log structure

Where: Agentld: identifies a log item belongs to which mobile agent. State-Type: indicates the type of mobile agent life state. Time: indicates the time when the mobile agent came to the

current State Type. Place: identifies the agent server where the mobile agent came

to the current State-Type at the specific time.


Outline

Introduction. Agent management. Life cycle. Mobile agent life state log structure.

Storage method.Storage method. Proposal. Question. Reference.


Storage method

Agent life state log structure storage methods as discussed in the following research paper: Mobile Agent Life State Management


Storage method

The storage method of the agent life state log indicates that where the log was stored.

There are many places to store the logs in a mobile agent system:

i. The agent server where the mobile agent is created.A necessary storage place.

ii. The agent server where the mobile agent currently stays.One of its basic functions.

iii. The mobile agent itself.Temporary place.


Storage method


Storage method

1. The agent server where the mobile agent is created:It is a necessary storage place because the mobile agent creator needs to know the status of its created agents during their life cycle.

2. The agent server to which the mobile agent migrates:Is a definite choice of place of life state log storage because managing the coming agent is one of its basic functions.

3. The mobile agent can take its life state logs too:but it is only temporary place because the mobile agent will be terminated at future time.


Outline

Introduction. Agent management. Life cycle. Mobile agent life state log structure. Storage method.

ProposalProposal.. Question. Reference.


Proposal

The storage strategy goes as follows: When a mobile agent migrates to an agent server,

both the server and the mobile agent itself log the agent life state change.

When the agent returns to its creator server, the mobile agent transfers the logs to the server and deletes the same from its own storage.


Proposal

Advantage. The life state logs will be stores in many

distributed places, so the reliability is increased. The creator server can search and analyze locally

life state logs of all the agents it created, which will decrease the network load and increase the search speed.


Proposal


Example

00:00:00

00:00:43

00:01:26

00:02:10

00:02:53

00:03:36

00:04:19

00:05:02

Susp

endin

g

Susp

endin

g

Susp

endin

g

Migra

tion

Migra

tion

Migra

tion

Activ

ating

Activ

ating

Activ

ating

M#0 M#1 M#2 M#0 M#1 M#2 M#0 M#1 M#2

Duration

Duration

PLACE AGENT-ID STATE-TYPE TIME Duration

MACHINE 0 AGENT 1 Suspending 00:00:01 00:00:0100:00:01

MACHINE 0 AGENT 1 Activating 00:00:02 00:00:0800:00:08


MACHINE 0 AGENT 1 Migration 00:00:20 00:00:4000:00:40










Outline

Introduction. Agent management. Life cycle. Mobile agent life state log structure. Storage method. Proposal.

Question.Question. Reference.


Question

QuestionObjectiveComments


Outline

Introduction. Agent management. Life cycle. Mobile agent life state log structure. Storage method. Proposal. Question.

Reference.Reference.


Reference

Mobile Agent Life State Management. Managing Agent Life Cycles in Open

Distributed Systems Supporting Life Cycle Coordination in Open

Agent Systems Design and implementation of a FIPA

compliant. Grasshopper A Universal Agent.

Technology

Agent Management 652