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Dave has over 15 years in the field of systems administration. He is a senior systems engineer at Tagged Inc. responsible for monitoring and metrics on the Tagged server farm. Dave developed his interest in metrics working at various ISPs over the years and an appreciation for doing it at scale leading the sysadmin team for the global CDN at Cable and Wireless and working at Terracotta, and Tagged. Most recently he has teamed up with Peter Phaal to validate and enhance the sFlow approach to application monitoring for a variety of applications.