z/OS Version 2 Release 3 MVS Planning: Workload Management IBM SC34-2662-30 Note Before using this information and the product it supports, read the information in “Notices” on page 235. This edition applies to Version 2 Release 3 of z/OS (5650-ZOS) and to all subsequent releases and modifications until otherwise indicated in new editions. Last updated: 2019-06-24 © Copyright International Business Machines Corporation 1994, 2019. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Figures................................................................................................................. xi Tables..................................................................................................................xv About this information....................................................................................... xvii Who should use this information..............................................................................................................xvii Where to find more information............................................................................................................... xvii Other referenced documents.................................................................................................................. xviii Information updates on the web...............................................................................................................xix How to send your comments to IBM.....................................................................xxi If you have a technical problem................................................................................................................xxi Summary of changes.........................................................................................xxiii Summary of changes for z/OS Version 2 Release 3 (V2R3)................................................................... xxiii Summary of changes in z/OS Version 2 Release 2 (V2R2) as updated March 2017............................. xxiv Summary of changes in z/OS Version 2 Release 2 (V2R2) as updated December 2015....................... xxv Summary of changes for z/OS Version 2 Release 2 (V2R2).................................................................... xxv Changes made in z/OS Version 2 Release 1 (V2R1) as updated December 2013................................. xxv Changes made in z/OS Version 2 Release 1............................................................................................ xxv Chapter 1. Why MVS workload management?.........................................................1 Problems addressed by workload management.........................................................................................1 MVS workload management solution for today and tomorrow.................................................................. 1 Chapter 2. What is MVS workload management?.................................................... 3 Performance administration........................................................................................................................ 4 Performance management.......................................................................................................................... 5 Workload balancing......................................................................................................................................5 Workload management concepts................................................................................................................6 What is a service definition?...................................................................................................................6 Why use service policies?.......................................................................................................................6 Organizing work into workloads and service classes............................................................................ 6 Why use resource groups or tenant resource groups?..........................................................................9 Assigning work to a service class.........................................................................................................10 Why use application environments?....................................................................................................11 Why use scheduling environments?.................................................................................................... 12 Summary of service definition and service policy concepts............................................................... 14 Chapter 3. Workload management participants.................................................... 17 Workload management work environments.............................................................................................17 Subsystem support for goal types and multiple periods.................................................................... 18 Subsystem-specific performance hints...............................................................................................19 Workload balancing................................................................................................................................... 19 Workload management in a CPSM environment................................................................................. 20 Workload management in a DB2 Distributed Data Facility environment........................................... 20 Batch workload management................................................................................................................... 20 Multisystem enclave support.................................................................................................................... 21 Intelligent Resource Director.................................................................................................................... 22 iii HiperDispatch mode.................................................................................................................................. 22 Overview............................................................................................................................................... 22 The concept of HiperDispatch mode................................................................................................... 22 Setting HiperDispatch mode in SYS1.PARMLIB.................................................................................. 23 I/O storage management...........................................................................................................................24 Handling service class periods with a response time goal................................................................. 24 Handling service class periods with a velocity goal............................................................................ 25 Handling other I/O requests................................................................................................................ 25 Controlling the information passed to the I/O manager..................................................................... 25 Non-z/OS partition CPU management...................................................................................................... 25 Workload management and Workload License Charges.......................................................................... 26 Defining the capacity of a partition......................................................................................................27 Defining group capacity........................................................................................................................28 Workload management with other products............................................................................................ 30 Chapter 4. Setting up a service definition............................................................. 31 Specifying a service definition...................................................................................................................31 Storing service definitions......................................................................................................................... 31 Defining the parts of a service definition...................................................................................................32 Chapter 5. Defining service policies......................................................................33 Using policy overrides................................................................................................................................34 Chapter 6. Defining workloads............................................................................. 37 Defining a departmental workload............................................................................................................37 Chapter 7. Defining resource groups.....................................................................39 Calculating an LPAR share — Example 1................................................................................................... 42 Specifying the capacity as a number of CPs — Example 2....................................................................... 44 Chapter 8. Defining tenant resource groups..........................................................45 Chapter 9. Defining service classes and performance goals...................................47