Online monitoring and module maintenance for CDF in the upcoming Fermilab Tevatron Run II

In this article we discuss two topics. Both are part of the CDF Run II-online system. First we present the design and current status of the CDF online monitoring project which is based on ROOT. The framework consists of three parts, the online event analysis programs to check the detector and data, the browser to display their results, and the server program which communicates with the display via socket connections. The second topic is an ORACLE based database application. It keeps track of the exact location, repair history, modification history and status of all DAQ electronic equipment during development, commissioning and physics running periods. We discuss the implementation and status of the database.