Front cover -- Contents -- Preface -- The team that wrote this redbook -- Special notice -- IBM trademarks -- Comments welcome -- Part 1 Introduction to Intelligent Resource Director -- Chapter 1. Introduction to Intelligent Resource Director (IRD) -- 1.1 S/390 - A history lesson -- 1.2 Why Intelligent Resource Director is the next step -- Part 2 WLM LPAR CPU Management -- Chapter 2. Introduction to WLM LPAR CPU Management -- 2.1 What WLM LPAR CPU Management is -- 2.2 Workload Manager advantages -- 2.3 Workload Manager highlights -- 2.4 LPAR concepts I -- 2.5 LPAR concepts II -- 2.6 Options prior to WLM LPAR CPU Management -- 2.7 Problems with existing CPU management options -- 2.8 Prerequisites for WLM CPU Management -- 2.9 WLM LPAR Weight Management I -- 2.10 WLM LPAR Weight Management II -- 2.11 WLM LPAR Weight Management III -- 2.12 WLM Vary CPU Management -- 2.13 Value of WLM LPAR CPU Management -- 2.14 When do you need WLM LPAR CPU Management? -- 2.15 Relationship to IBM License Manager -- 2.16 New terminology for WLM LPAR CPU Management -- Chapter 3. How WLM LPAR CPU Management works -- 3.1 Shared logical CPs example -- 3.2 LPAR dispatching and shared CPs -- 3.3 Reasons for intercepts -- 3.4 LPAR event-driven dispatching -- 3.5 LPAR weights -- 3.6 LPAR capping -- 3.6.1 LPAR capped vs. uncapped -- 3.7 What drives WLM LPAR CPU Management decisions -- 3.8 WLM LPAR Weight Management -- 3.8.1 WLM LPAR Weight Management example -- 3.9 WLM LPAR Vary CPU Management -- 3.9.1 WLM LPAR Vary CPU Management concepts -- 3.9.2 WLM Vary CPU Management logic -- 3.9.3 Example - Too many logical CPs online -- 3.9.4 Example - Exact amount of logical CPs online -- 3.9.5 Example - Too few logical CPs online -- 3.10 Effect of WLM Weight Management on WLM Vary CPU Management -- 3.11 Switching to WLM Compatibility mode -- 3.12 Use of CF structures.

3.13 How to interface to WLM LPAR CPU Management -- Chapter 4. Planning for WLM LPAR CPU Management -- 4.1 Identifying candidate environments -- 4.2 WLM Policy definitions -- 4.3 Hardware prerequisites -- 4.4 Software prerequisites -- 4.5 Mixed software releases -- 4.6 WLM mode considerations -- 4.7 Coupling Facility prerequisites -- 4.8 Multiple LPAR Cluster/sysplex configurations -- 4.9 Recovery considerations -- 4.10 IBM License Manager considerations -- Chapter 5. Implementing WLM LPAR CPU Management -- 5.1 Example configuration -- 5.2 WLM definitions -- 5.3 Defining WLM structures -- 5.4 z/OS definitions -- 5.5 HMC definitions -- 5.5.1 HMC Change LPAR Controls panel -- 5.6 Migrated demonstration configuration -- 5.7 Summary -- Chapter 6. Operating WLM LPAR CPU Management -- 6.1 Dynamic HMC operations -- 6.2 z/OS operator commands -- 6.3 Managing the WLM CF structure -- 6.4 Automation considerations -- 6.5 Problem determination -- Chapter 7. Performance and tuning for WLM CPU Management -- 7.1 WLM LPAR CPU Management considerations -- 7.2 RMF reports -- 7.2.1 RMF Monitor I - CPU Activity Report -- 7.2.2 RMF Monitor I - LPAR Partition Report -- 7.2.3 RMF Monitor I - LPAR Cluster Report -- 7.3 Other RMF reports -- 7.4 SMF considerations -- 7.5 A tuning methodology for WLM LPAR CPU Management -- Part 3 Dynamic Channel-path Management -- Chapter 8. Introduction to Dynamic Channel-path Management -- 8.1 Supported environments -- 8.2 Value of Dynamic Channel-path Management -- 8.2.1 Improved overall I/O performance -- 8.2.2 Simplified configuration definition -- 8.2.3 Reduced skills requirement -- 8.2.4 Maximize utilization of installed resources -- 8.2.5 Enhanced DASD subsystem availability -- 8.2.6 Reduced requirement for more than 256 channels -- 8.3 Devices and channels that can be managed -- 8.4 New terminology for DCM.

8.5 WLM role in Dynamic Channel-path Management -- 8.6 Environments most likely to benefit -- Chapter 9. How Dynamic Channel-path Management works -- 9.1 Understanding the basics -- 9.1.1 Life of an I/O -- 9.1.2 Unit Control Block -- 9.1.3 Channel subsystem logic -- 9.1.4 Channels -- 9.1.5 Directors -- 9.1.6 Control units -- 9.1.7 Unit address -- 9.1.8 Device number -- 9.1.9 Subchannel number -- 9.1.10 Paths -- 9.2 Configuration definition prior to DCM -- 9.3 Configuration definition for DCM -- 9.3.1 Dynamic Channel-path Management channel definitions -- 9.3.2 Dynamic Channel-path Management control unit definitions -- 9.4 Initialization changes -- 9.5 I/O Velocity -- 9.6 Balance and Goal modes highlights -- 9.6.1 Balance mode: data gathering and logic -- 9.6.2 Goal mode -- 9.6.3 Balance checking and imbalance correction -- 9.7 Decision Selection Block -- 9.8 Implementing DCM decisions -- 9.9 RAS benefits -- Chapter 10. Planning for Dynamic Channel-path Management -- 10.1 Hardware planning -- 10.1.1 CPC requirements -- 10.1.2 Supported control units -- 10.1.3 Unsupported CUs -- 10.1.4 Switch considerations -- 10.1.5 Channel path considerations -- 10.2 Software planning -- 10.2.1 Operating system requirements -- 10.2.2 Other software requirements -- 10.2.3 Coexistence considerations -- 10.2.4 Sysplex configuration requirements -- 10.2.5 WLM considerations -- 10.3 DCM Coupling Facility requirements -- 10.4 MIF considerations -- 10.5 Identifying candidate control units -- 10.5.1 Understanding your configuration -- 10.5.2 Identifying channels for DCM -- 10.6 Migration planning -- 10.7 Backout plan -- Chapter 11. Implementing Dynamic Channel-path Management -- 11.1 HCD definitions -- 11.1.1 Managed Channel definitions -- 11.1.2 CU definitions -- 11.1.3 Switch definitions -- 11.1.4 Creating a CONFIGxx member -- 11.1.5 Setting up DCM without HCD.

11.2 WLM changes -- 11.3 HMC changes -- 11.4 Building the IOSTmmm module -- 11.5 Activating the changes -- Chapter 12. Operating Dynamic Channel-path Management -- 12.1 New operator commands -- 12.1.1 D M=CHP command -- 12.1.2 D M=SWITCH command -- 12.1.3 D M=DEV command -- 12.1.4 D M=CONFIG command -- 12.1.5 D IOS commands -- 12.1.6 D WLM,IRD command -- 12.1.7 VARY SWITCH command -- 12.1.8 VARY PATH command -- 12.1.9 SETIOS command -- 12.1.10 CF CHP command -- 12.2 Operational scenarios -- 12.3 Automation considerations -- 12.4 Dynamic I/O reconfiguration -- 12.5 Problem determination -- Chapter 13. Performance and tuning for DCM -- 13.1 RMF considerations -- 13.1.1 Channel Path Activity report -- 13.1.2 I/O Queueing Activity Report -- 13.2 SMF changes -- 13.3 Capacity planning considerations -- Part 4 Channel Subsystem I/O Priority Queueing -- Chapter 14. Channel Subsystem I/O Priority Queueing -- 14.1 Life of an I/O operation -- 14.2 Impact of I/O queueing -- 14.3 Previous I/O priority support -- 14.3.1 DASD sharing prior to Multiple Allegiance -- 14.3.2 ESS Multiple Allegiance -- 14.3.3 ESS - Multiple Allegiance and Parallel Access Volumes -- 14.3.4 Impact of IBM 2105 features -- 14.4 Channel subsystem queueing -- 14.5 Reasons for Channel Subsystem I/O Priority Queueing -- 14.6 Value of Channel Subsystem I/O Priority Queueing -- 14.7 WLM's role in I/O Priority Queueing -- 14.7.1 WLM management of I/O priority -- 14.7.2 WLM-assigned I/O priority -- 14.7.3 WLM-assigned CSS I/O priorities -- 14.8 Adjusting priorities based on Connect time ratio -- 14.9 How to manage Channel Subsystem I/O Priority Queueing -- 14.10 HMC role -- 14.11 Early implementation experiences -- Chapter 15. Planning & implementing CSS I/O Priority Management -- 15.1 Enabling I/O priority management in WLM -- 15.2 Enabling CSS I/O priority management on the HMC.

15.3 Planning for mixed software levels -- 15.4 Software prerequisites -- 15.5 Hardware prerequisites -- 15.6 Operational considerations -- 15.7 Performance and tuning -- 15.8 Tape devices -- Related publications -- IBM Redbooks -- Other resources -- Referenced Web sites -- How to get IBM Redbooks -- IBM Redbooks collections -- Special notices -- Index -- Back cover.