Linux Appliance Design

A.1. Overview of RTA

The RTA package addresses the challenges described above by giving real-time access to the data structures and arrays inside a running program. With minimal effort, we can use RTA to make a program's data structures appear as PostgreSQL tables in a PostgreSQL database.

Using RTA, a structure definition is also the definition for a table row, and an array of structures will appear as a table. For example, the code below shows a definition of a data structure for TCP connection information.

 struct tcpconn { int fd; // conn's file descriptor int lport; // local port number int dport; // destination port number long nsbytes; // number of sent bytes long nrbytes; // number of received bytes long nread; // number of reads on the ...