A DISTRIBUTED NETWORK MONITOR SYSTEM BASED ON UNIX

Presented in this paper is the comprehensive and detailed information about the design and implementation of Internet Monitor System based on Unix. The main idea is to divide the system into three layers and to set up the databases between layers as the interface: in the first layer, DLPI and STREAM mechanism are introduced, and the synchronism and mutual exclusion between threads are discussed in detail; the middle layer focuses on how to improve the system performance by distributed processing, and provides some experimental data to indicate the advantage of distributed retrieval; in the up layer, the techniques of CGI programming and implementation of the Web based user interface are employed and the authentication method of browser user is described in detail. Compared with products of domestic and overseas, this system has the advantage of capabilities of data processing and scalability.