Workload Manager Fundamentals

Objectives
On successful completion of this course, attendees will be able to:

• define service policies, service classes and classification rules
• describe the mechanisms for managing and balancing any workload in a WLMPlex,
• explain the implications of using Workload Managed Batch and Resource Affinity Scheduling
• describe the changes required to migrate to a Workload Manager Goal mode environment
• carry out a migration to Goal mode and maintain the environment thereafter.

Who Should Attend
Systems programmers and technical support personnel responsible for the performance tuning of z/OS MVS.

Prerequisites
A good general knowledge of how a z/OS MVS system works and how it is maintained and configured is a prerequisite for attending this course.

Duration
2 days

Course Code
3067

Contents
Workload Management Overview
The Workload Manager (WLM); WLM Goal Mode and Parmlib members; WLM concepts; Service Policies; Multi-system workload management; Workload reporting; Building the service definition; Service Policy; Creating workloads; Creating resource groups; Creating service classes; Goal types; Creating Service Classes; IBM specified subsystems; Work qualifiers; Subsystems and work qualifiers; Classification Groups; System-provided Service Classes; Defining service policy overrides; Specifying overriding Goals for a Service Class; The Service Definition; Classification rules for subsystems; Implementing WLM; Create performance objectives; Manuals on WLM.


How WLM works
WLM components; WLM Considerations; Dispatchable Units (DUs); SRB types & priorities; SRB scheduling with IEAMSCHD; SRB Enclaves; Dispatcher queues; Performance Index; Donor and receiver determination; Dispatching Priority Control; Dispatching Priority Assignment; INITTMP; Swap control; Work Requests to WLM; Server Topology; Monitoring environment - CICS & IMS; Enclave management; DASD I/O priority management; Sysplex I/O Priority Management; Parallel Access Volumes (PAV); Policy Adjustment Function; Resource Adjustment Function; Workload management services.


Workload Management Functions
TSO, batch and STC workloads; CICS, IMS, DDF and APPC workloads; non IBM or RYO workloads; DB2 Sysplex Query Parallelism; DB2 stored procedures; HTTP server workloads; UNIX System Services workloads; WLM batch enhancements; WLM Managed Batch (WMB); WLM - JES2 interaction; work classification; Resource Affinity Scheduling; WMB migration issues.


Workload Manager Applications
TSO workloads; Emergency TSO Service Class; WLM Batch Initiators; Scheduling Environment; WLM or JES Initiators?; Batch workloadsBatch workload Goals; Special Service Classes; STC default Service Classes; STC Service Class considerations; SYSSTC Service Class; DB2 Address Spaces; DDF enclaves; Classification rules for DDF; DDF Goal types; DB2 Stored Procedures; Sysplex Query Parallelism; CICS - Types of Goals; CICS Region Management Goal; CICS Transaction Management Goal; Transaction goal rules; Unix System Services (USS); Why USS uses WLM; UNIX Services fork and spawn function calls; USS Service Classes; USS Classification rules; Definitions for OMVS subsystem type work.


Understanding RMF Reports
Resource Measurement Facility; SMF Records; Monitor II; Monitor III; Postprocessor Reports; Workload activity report reporting options; Workload activity report - Goal mode; RMF monitor I service class period report Goal mode; Monitor I workload group and service class period report; CACHE - Cache subsystem summary report; CHAN - Channel path activity report; DEVICE - Device activity report; Monitor I shared DASD activity; Monitor I shared tape activity report; FCD - FICON Director activity report; IOQ - I/O Queuing activity report ; HFS - Hierarchical File System global statistics report; HFS - Hierarchical File System statistics report ; OMVS - OMVS kernel activity report; PAGESP -Page/Swap data set activity report; PAGING - Paging Activity report; VSAM RLS activity by storage class; VSAM RLS activity by data set.