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David Josephsen

David Josephsen is the Director of Systems Engineering at DBG, Inc., where he maintains a collection of geographically dispersed server farms. He has more than a decade of hands-on experience with Unix systems, routers, firewalls, and load balancers in support of complex, high-volume networks. He authored the book "Building a Monitoring Infrastructure with Nagios" (Addison Wesely), wrote three chapters in "Monitoring with Ganglia" (O'Reilly Media) and currently writes "iVoyer", the systems monitoring column for ;login magazine.