Mobile Agent-based Full With Like The Vdb E-book System

Mobile Agent, which originates from distributed-system research area and indicates the future of Internet ,is the result of gradually developed distributed-system technology.Nevertheless,as a new concept,the Mobile Agent is probed both home and abroad.Hence.there's neither regular model nor detailed description of Agent.Taking it for granted,this essy aims at the availiblity of Mobile Agent on the base of the mobility and autonomy of it.This essy then describes the "Agent-based and fully materialized virtual database in the electronical book market system",in which the author plays an importmant role.As regard to this sysetm,a uniform mirror database(book market) of all sourcedatabases is established and,with the help of the Mobile Agent ,it ensures more instant access to diversified book information the customer needed.When some data is changed in the source termiante,the Mobile Agent then carries modification informations and moves from the source terminate to the mirror terminate,and,by doing relevant operations,the diferrent databases in different ends then become consistent. With all tasks being executed.the Mobile Agent return .In a word,during it's life time,Mobile Agent transports back and fro.,which is called mobility.and feels and influences environments.namely autonomy.