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Botnets pose serious threats to the Internet. In spite of substantial efforts to address the issue, botnets are dramatically spreading. Bots in a botnet execute commands under the control of the botnet owner or controller. A first step in protecting against botnets is identification of their presence, and activities. In this paper, we propose a method of identifying the high-level commands executed...
Self-adaptive and self-organizing systems must be self-monitoring. Recent research has shown that self-monitoring can be enabled by using correlations between monitoring variables (metrics). However, computer systems often make a very large number of metrics available for collection. Collecting them all not only reduces system performance, but also creates other overheads related to communication,...
In recent years, IT service management (ITSM) has become one of the most researched areas of IT. Incident and problem management are two of the service operation processes in the IT infrastructure library (ITIL). These two processes aim to recognize, log, isolate and correct errors which occur in the environment and disrupt the delivery of services. Incident management and problem management form...
With the growing complexity in computer systems, it has been a real challenge to detect and diagnose problems in today's large-scale distributed systems. Usually, the correlations between measurements collected across the distributed system contain rich information about the system behaviors, and thus a reasonable model to describe such correlations is crucially important in detecting and locating...
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