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Catastrophic Failures in Networked Systems

Catastrophic Failures in Networked Systems. Jon Crowcroft Jon.crowcroft@cl.cam.ac.uk http://www.cl.cam.ac.uk/~jac22/out/bcs.pdf. Non Complex Failures. Naming Routing Searching. Complex & Emergent Phenomena. Sunchronisation of Routing Updates Self Similar Traffic Scale Free Topology

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Catastrophic Failures in Networked Systems

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  1. Catastrophic Failures in Networked Systems Jon Crowcroft Jon.crowcroft@cl.cam.ac.uk http://www.cl.cam.ac.uk/~jac22/out/bcs.pdf

  2. Non Complex Failures • Naming • Routing • Searching

  3. Complex & Emergent Phenomena • Sunchronisation of Routing Updates • Self Similar Traffic • Scale Free Topology • Non Emergent Properties • Phase Changes • Congestion collapse

  4. Complex Badness • Malware • Unintended • End system attack side effect • overloads control plane => • No routes • Self limiting • Intentended • Zero Day work spread • Vigilante defense spread • Race!!! • Outcome - depends on lots of parameters • And initial conditions - just like H1N1 :-)

  5. Conclusions • We have had several near misses • mostly features of complicatedness • Not really complexity • Doesn’t mean we don’t have things to fix • mainly just be better engineering

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