IBM Systems Magazine, Mainframe - March/April 2009 - 39

renaming as we explained earlier. By default, PTK retains performance data only for the three days. To retain data for more than three days, z/VM has an exit that’s invoked when the date changes and before PTK does its end-of-day processing. This exit looks for FCXRENAM EXEC; if it exists, then it’s executed. A REXX EXEC, FCXRENAM EXEC is created to copy HISTLOG2 as HISTLOG3, so HISTLOG2 contents aren’t lost. The copy is performed to a different disk, so A disk doesn’t become full. To retain data for more than three days, the FCXRENAM EXEC is created and this REXX code is added: /* fcxrenam exec */ ‘copy * histlog2 a = histlog3 p’ exit each guest, three sets of each file type are kept (e.g., USERLOG, USERLOG1 and USERLOG2). These files take the same name as the guest user ID. By default data is kept online for three days. If data is required to be kept longer FCXRENAM EXEC has to be modified accordingly. Working With PTK The best way to start PTK is to have it autologged when z/VM starts up. PTK can be started by logging on to the guest user PERFSVM. PTK can be terminated by logging off the guest user PERFSVM. Arunkumaar Ramachandran is a Senior IT Specialist at IBM India Software Labs. His areas of expertise include z/OS and z/VM. Arunkumaar can be reached at aruramac@in.ibm.com. Shirang B. Kulkarni is an Advisory IT Specialist at IBM India Software Labs. His areas of expertise include z/VM and Linux*. Shrirang can be reached at shrirkul@in.ibm.com. For those guest users mentioned in FC BENCHMRK statement, PTK writes user-specific data to files of type USTATLG (wait state data log), UCOMMLG (communication data log), USERLOG (resource usage log) and UPAGELG (QDIO activity log). For SHARE in Austin March 1-6, 2009 Austin Convention Center Austin, Texas NEW! SHARE Theme Rooms – Each Day Find a Different Way to See the Big Picture SHARE now oﬀers Theme Rooms, your one-stop destinations—both online and onsite in Austin—for sessions dedicated to the 2009 focus themes: Total Enterprise Virtualization and Service Orientation – The Foundation for IT Modernization. Find the speciﬁc topics, content and location information for each theme by perusing these new and helpful pages. To learn more about the 2009 focus themes and to visit the new Theme Rooms, visit austin.share.org/focus. Total Enterprise Virtualization: Monday, March 2 The Basics of Virtualization Service Orientation – The Foundation for IT Modernization: Sunday, March 1 The Basics of Agile: Hands-On Workshop Tuesday, March 3 Network Virtualization Wednesday, March 4 Server Consolidation Business Cases Monday, March 2 Foundations for the Business Case and Basics of SOA Thursday, March 5 Non-Traditional Virtualization Tuesday, March 3 Focus on Service Orientation Friday, March 6 Virtualization Technique Comparison Across Platforms Wednesday, March 4 Agile Methods Thursday, March 5 Security Issues of Building and Delivering SOA Friday, March 6 Register today and browse hundreds more technical sessions designed to step up your performance at austin.share.org/focus! Capabilities of System z to Deliver Web 2.0, SOA and Other Services M A R C H/A PRIL 2009 ibmsystemsmag.com/mainframe 39

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IBM Systems Magazine, Mainframe - March/April 2009

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - March/April 2009