Brendan Gregg is a performance specialist at Joyent and is known worldwide in the field of DTrace. Brendan created and developed the DTraceToolkit and is the coauthor of Solaris™ Performance and Tools (Prentice Hall, 2006) as well as numerous articles about DTrace. He was previously the performance lead for the Sun/Oracle ZFS storage appliance and a software developer on the Fishworks advanced development team at Sun, where he worked with the three creators of DTrace. Many of Brendan’s DTrace scripts are shipped by default in Mac OS X.
Jim Mauro is a senior software engineer for Oracle Corporation, working in the Systems group with a primary focus on systems performance. Jim has 30 years of experience in the computer industry and has used DTrace extensively for his performance work since it was first introduced in Solaris 10. Jim coauthored Solaris™ Performance and Tools and the first and second editions of Solaris™ Internals (Sun Microsystems Press, 2000, and Prentice Hall, 2006) and has written numerous articles and whitepapers on various aspects of Solaris performance and internals.