Kazuhiro Nakajima  is a Senior IT Specialist in IBM Japan. He has almost 30 years career in  IBM Japan and he has been active as an advanced Subject Matter Expert of IBM Z products  for over 20 years. His areas of expertise include IBM Z hardware, performance, z/OSfi, and  IBM Z connectivity. He has been a co-author of several IBM Z configuration set up IBM  Redbooks publications from the IBM zEC12 to the IBM z14fi. Paul Schouten  is an IBM Z Client Technical Specialist based in Sydney, Australia. During his  40 years supporting mainframe systems, he has performed many roles, including Certified IT  Architect, Systems Software developer, and Systems Programming. He has extensive  experience developing and documenting high availability solutions for IBM’s enterprise  customers. Anna Shugol   is a mainframe technical specialist with IBM UK. She has over 8 years of  Mainframe experience and has worked with clients in various geographies. Large system  performance is one of her key areas of expertise. Anna holds a Computer Science degree  from Bauman Moscow State Technical University. Frank Packheiser  is a Senior zIT Specialist at the Field Technical Sales Support office in  Germany. He has over 25 years of experience in IBM Z. Frank has worked for 10 years in the  IBM Education Center in Germany, developing and providing professional training. He also  provides professional services to IBM Z and mainframe clients. In 2008 and 2009, Frank  supported clients in Middle East/North Africa (MENA) as a zIT Architect. In addition to  co-authoring several IBM Redbooks publications since 1999, he has been an official ITSO  presenter at ITSO workshops since 2010. Hervey Kamga  is an IBM Z Product Engineer with the EMEA I/O Connectivity Team in  Montpellier, France. Before serving in his current role, he was a Support Engineer and  Engineer On Site for 13 years with Sun MicroSystems and Oracle in EMEA. Hervey’s areas of  expertise include Oracle Solaris (operating system and hardware products), virtualization  (VMware and virtualBox), Linux, and IBM Z I/O features and protocols (IBM FICONfi and  OSA) while co-authoring several IBM Redbooks publications. Bo Xu  is a consulting product Service SSR in China. He has more than 20 years of  experience with IBM Z platform maintenance support. He has been working in IBM’s Global  Technology Servicesfi department to provide IBM Z platform support to clients as a local Top  Gun, and as second-level support for IBM DS8000fi as one of the country’s Top Gun & Skill  Owners. His areas of expertise include IBM Z platform hardware, channel connectivity, and  IBM DS8000 storage. Thanks to the following people for their contributions to this project: Dave Surman, Darelle Gent, David Hutton, Tom Dewkett, Frank Bosco, Patty Driever, Anthony  Sofia, Brian Valentine, Purvi Patel, Les Geer III, Bill Bitner, Christine Smith, Barbara Weiler,  Dean St Piere, Tom Morris, Ellen Carbarnes, Gregory Hutchison, Riaz Ahmad, Franco Pinto,  Walter Niklaus, Martin Recktenwald, Roan Dawkins IBM xvi  IBM z15 (8561) Technical Guide Robert Haimowitz IBM Redbooks, Poughkeepsie Center