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Published on Nov 13, 2012
Brendan Gregg at illumos Day. http://zfsday.com/about-illumos-day/d... http://www.brendangregg.com/ Cloud computing facilitates rapid deployment and scaling, often pushing high load at applications under continual development. DTrace allows immediate analysis of issues on live production systems even in these demanding environments -- no need to restart or run a special debug kernel. For the illumos kernel, DTrace has been enhanced to support cloud computing, providing more observation capabilities to zones as used by Joyent SmartMachine customers. DTrace is also frequently used by the cloud operators to analyze systems and verify performance isolation of tenants. This talk covers DTrace in the illumos-based cloud, showing examples of real-world performance wins.