Automated Online Monitoring of Distributed Applications through External Monitors
IEEE Transactions on Dependable and Secure Computing
ACM Transactions on Autonomous and Adaptive Systems (TAAS)
Automated Rule-Based Diagnosis through a Distributed Monitor System
IEEE Transactions on Dependable and Secure Computing
Dependence-based multi-level tracing and replay for wireless sensor networks debugging
Proceedings of the 2011 SIGPLAN/SIGBED conference on Languages, compilers and tools for embedded systems
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The wide deployment of high-speed computer networks has made distributed systems ubiquitous in today's connected world The machines on which the distributed applications are hosted are heterogeneous in nature, the applications often run legacy code without the availability of their source code, the systems are of very large scales, and often have soft real-time guarantees.In this paper, we target the problem of online detection of disruptions through a generic external entity called Monitor that is able to observe the exchanged messages between the protocol participants and deduce any ongoing disruption by matching against a rule base composed ofcombinatorial and temporal rules.The Monitor architecture is application neutral, with the rule base making it specific to a protocol.To make the detection infrastructure scalable and dependable, we extend it to a hierarchical Monitor structure.The infrastructure is applied to a streaming video application running on a reliable multicast protocol called TRAM installed on the campus wide network.The evaluation brings out the scalability of the Monitor infrastructure and detection coverage under different kinds of faults for the single level and the hierarchical arrangements.