Monitoring in Distributed Client-Server Environments

摘要

The behavior of a distributed system is more complex than that of a monolithical operating system. In order to monitor such a system, one should be able to build models of the expected system behavior and compare these with the actual system behavior. The goal of this 'behavioral abstraction' is to obtain a better overall view of the system's activities. Filtering out unimportant events and combining events in order to obtain higher-level models are important features of a tool to be used for the aforementioned purposes. The paper describes the design and implementation of montool, a monitoring tool which has the desired functionalities. Montool is based on a layered model for monitoring. It acts as an interpreter of the behavior description language SESL. The current implementation of montool runs on the Amoeba Distributed Operating System.