Tactics of SQL Remote Query Message Based on Modification Frequency

At first,this paper introduces SQL Remote replication technology and message agent.Then direct against the deficiency of the tactics which inquiry message on the regular time,the tactics which inquiry message based on modification frequency is put forward,and the corresponding algorithm is also provided,and the way that message agent send message is improved.The experiment proves that this tactics greatly lights the burden of message agent and mail system.The tactics bitterly solves the problem which produced by the deficiency of the tactics which inquiry message on the regular time.