Brendan Gregg is a senior performance architect at Netflix, where he does large-scale computer performance design, evaluation, analysis, and tuning. Previously, Brendan worked as a performance and kernel engineer. He has created performance-analysis tools included in multiple operating systems, as well as visualizations and methodologies. Brendan is the author of Systems Performance (Prentice Hall, 2013). He received the USENIX LISA Award for outstanding achievement in system administration.