<p>z/OS Version 2 Release 3 </p><p><em>MVS Planning: Workload Management </em></p><p>IBM </p><p><strong>SC34-2662-30 </strong></p><p><strong>Note </strong></p><p>Before using this information and the product it supports, read the information in “Notices” on page 235. </p><p>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. </p><p>Last updated: 2019-06-24 </p><p><strong>©</strong></p><p><strong>Copyright International Business Machines Corporation 1994, 2019. </strong></p><p>US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. </p><p><strong>Contents </strong></p><p><strong>Figures................................................................................................................. xi Tables..................................................................................................................xv About this information....................................................................................... xvii </strong></p><p>Who should use this information..............................................................................................................xvii Where to find more information............................................................................................................... xvii Other referenced documents.................................................................................................................. xviii Information updates on the web...............................................................................................................xix </p><p><strong>How to send your comments to IBM.....................................................................xxi </strong></p><p>If you have a technical problem................................................................................................................xxi </p><p><strong>Summary of changes.........................................................................................xxiii </strong></p><p>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 </p><p><strong>Chapter 1. Why MVS workload management?.........................................................1 </strong></p><p>Problems addressed by workload management.........................................................................................1 MVS workload management solution for today and tomorrow.................................................................. 1 </p><p><strong>Chapter 2. What is MVS workload management?.................................................... 3 </strong></p><p>Performance administration........................................................................................................................ 4 Performance management.......................................................................................................................... 5 Workload balancing......................................................................................................................................5 Workload management concepts................................................................................................................6 <br>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 </p><p><strong>Chapter 3. Workload management participants.................................................... 17 </strong></p><p>Workload management work environments.............................................................................................17 <br>Subsystem support for goal types and multiple periods.................................................................... 18 Subsystem-specific performance hints...............................................................................................19 <br>Workload balancing................................................................................................................................... 19 <br>Workload management in a CPSM environment................................................................................. 20 Workload management in a DB2 Distributed Data Facility environment........................................... 20 <br>Batch workload management................................................................................................................... 20 Multisystem enclave support.................................................................................................................... 21 Intelligent Resource Director.................................................................................................................... 22 </p><p><strong>iii </strong></p><p>HiperDispatch mode.................................................................................................................................. 22 <br>Overview............................................................................................................................................... 22 The concept of HiperDispatch mode................................................................................................... 22 Setting HiperDispatch mode in SYS1.PARMLIB.................................................................................. 23 <br>I/O storage management...........................................................................................................................24 <br>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 <br>Non-z/OS partition CPU management...................................................................................................... 25 Workload management and Workload License Charges.......................................................................... 26 <br>Defining the capacity of a partition......................................................................................................27 Defining group capacity........................................................................................................................28 <br>Workload management with other products............................................................................................ 30 </p><p><strong>Chapter 4. Setting up a service definition............................................................. 31 </strong></p><p>Specifying a service definition...................................................................................................................31 Storing service definitions......................................................................................................................... 31 Defining the parts of a service definition...................................................................................................32 </p><p><strong>Chapter 5. Defining service policies......................................................................33 </strong></p><p>Using policy overrides................................................................................................................................34 </p><p><strong>Chapter 6. Defining workloads............................................................................. 37 </strong></p><p>Defining a departmental workload............................................................................................................37 </p><p><strong>Chapter 7. Defining resource groups.....................................................................39 </strong></p><p>Calculating an LPAR share — Example 1................................................................................................... 42 Specifying the capacity as a number of CPs — Example 2....................................................................... 44 </p><p><strong>Chapter 8. Defining tenant resource groups..........................................................45 Chapter 9. Defining service classes and performance goals...................................47 </strong></p><p>Velocity formula......................................................................................................................................... 49 Defining performance goals.......................................................................................................................50 <br>Determining system response time goals........................................................................................... 50 Examples of service classes with response time goals...................................................................... 52 Defining velocity goals......................................................................................................................... 53 Adjusting velocity goals based on samples included in velocity calculation..................................... 53 Using velocity goals for started tasks.................................................................................................. 54 Using discretionary goals..................................................................................................................... 54 <br>Using performance periods....................................................................................................................... 55 <br>Defining goals appropriate for performance periods.......................................................................... 55 Using importance levels in performance periods................................................................................55 </p><p><strong>Chapter 10. Defining classification rules...............................................................57 </strong></p><p>Defining classification rules for each subsystem......................................................................................59 <br>Defining work qualifiers....................................................................................................................... 62 <br>Defining special reporting options for workload reporting.......................................................................75 Defining the order of classification rules...................................................................................................77 <br>Defining a subsystem service class default.........................................................................................77 <br>Organizing work for classification..............................................................................................................81 <br>Using masking notation........................................................................................................................82 Using wildcard notation....................................................................................................................... 82 Using the start position........................................................................................................................ 83 Using groups.........................................................................................................................................85 </p><p><strong>iv </strong></p><p>Using the system-supplied service classes.........................................................................................87 </p><p><strong>Chapter 11. Defining tenant report classes........................................................... 89 Chapter 12. Defining report classes......................................................................91 Chapter 13. Defining service coefficients and options........................................... 93 </strong></p><p>Deactivate discretionary goal management............................................................................................. 93 Calculating the amount of service consumed...........................................................................................93 Service definition coefficients................................................................................................................... 94 <br>Changing your coefficient values......................................................................................................... 94 Using the storage (MSO) coefficient for calculations.......................................................................... 95 <br>Specifying I/O priority management......................................................................................................... 96 <br>Considerations for I/O priority management...................................................................................... 96 <br>Enabling I/O priority groups...................................................................................................................... 96 <br>Considerations for I/O priority groups.................................................................................................96 <br>Specifying dynamic alias management.....................................................................................................96 <br>Workload management considerations for dynamic alias management........................................... 96 HCD considerations for dynamic alias management.......................................................................... 97 </p><p><strong>Chapter 14. Defining special protection options for critical work........................... 99 </strong></p><p>Long-term storage protection....................................................................................................................99 <br>Storage critical for address spaces......................................................................................................99 Storage critical for CICS and IMS transactions................................................................................. 100 <br>Long-term CPU protection.......................................................................................................................100 Long-term I/O protection........................................................................................................................ 100 Honor priority...........................................................................................................................................101 Modifications of transaction response time management.....................................................................102 Sample scenarios.................................................................................................................................... 103 <br>Scenario 1...........................................................................................................................................103 Scenario 2...........................................................................................................................................104 Scenario 3...........................................................................................................................................106 Scenario 4...........................................................................................................................................107 Scenario 5...........................................................................................................................................108 Scenario 6...........................................................................................................................................108 <br>Reporting..................................................................................................................................................110 Option summary...................................................................................................................................... 110 </p><p><strong>Chapter 15. Defining application environments.................................................. 113 </strong></p><p>Getting started with application environments...................................................................................... 113 Specifying application environments to workload management...........................................................114 Selecting server limits for application environments............................................................................. 116 How WLM manages servers for an application environment ................................................................ 118 Using application environments..............................................................................................................118 Managing application environments....................................................................................................... 119 <br>Using operator commands for application environments................................................................ 119 Making changes to the application environment servers................................................................. 120 Changing the definition of an application environment.................................................................... 120 Handling error conditions in application environments....................................................................121 <br>Authorizing application environment servers.........................................................................................121 <br>Example for restricting access to application environment servers.................................................121 </p><p><strong>Chapter 16. Defining scheduling environments................................................... 123 </strong></p><p>Getting started with scheduling environments.......................................................................................123 Specifying scheduling environments to workload management........................................................... 123 Managing resource states....................................................................................................................... 125 </p><p><strong>v</strong></p><p>Associating scheduling environments with incoming work................................................................... 128 Displaying information about scheduling environments and resource states.......................................128 <br>MVS operator commands...................................................................................................................128 JES2/JES3 operator commands........................................................................................................130 SDSF commands................................................................................................................................ 130 </p><p><strong>Chapter 17. Workload management migration.................................................... 131 </strong></p><p>Creating a service definition for the first time........................................................................................ 131 Migrating to a new z/OS release with an existing service definition...................................................... 133 Migration activities.................................................................................................................................. 133 <br>Restricting access to the WLM service definition..............................................................................134 Start the application and enter/edit the service definition...............................................................135 Calculate the size of the WLM couple data set..................................................................................137 Allocate a WLM couple data set.........................................................................................................138 Make a WLM couple data set available to the sysplex for the first time...........................................140 Make a newly formatted couple data set available to the sysplex................................................... 141 Migration considerations for velocity................................................................................................ 142 Migration considerations for discretionary goal management......................................................... 143 Migration considerations for dynamic alias management................................................................ 143 Migration considerations for multisystem enclaves..........................................................................143 Migration considerations for protection of critical work................................................................... 143 Migration considerations for managing non-enclave work in enclave servers................................ 143 Migration considerations for an increased notepad size.................................................................. 144 WLM managed batch initiator balancing........................................................................................... 144 Consider resource group maximum in WLM batch initiator management....................................... 145 </p>