Brendan Gregg is the lead performance engineer at Joyent, where he analyzes the performance of small to large cloud computing environments, at any level of the software stack, down to metal. He is a co-author of DTrace and Solaris Performance and Tools (Prentice Hall), and developed the DTraceToolkit and the ZFS L2ARC. Many of Brendan's performance tools are shipped by default in Mac OS X and Oracle Solaris 11.
