Introduction to the new mainframe: Large-Scale Commercial Computing © Copyright IBM Corp., All rights reserved. Chapter 7: Systems Management

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 2 Chapter objectives After completing this chapter, you will be able to: Understand system management disciplines Understand the different data types z/OS uses Understand how errors are handled

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 3 Introduction to systems management Systems management is a general term that is widely used, and whose meaning is context dependant. In some cases systems management means the operator interface, while in others, it means provisioning capacity. In a large-scale commercial system, systems management usually is considered to be “A collection of disciplines aimed to monitor and control a system’s behavior.”

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 4 Introduction to systems management  Performance management  Workload management  Configuration management  Operations management  Problem management  Network management  Storage management  Security management  Change management

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 5 System Data  Accounting  Reporting Performance Errors

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 6 Data Collection in z/OS

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 7 Z/OS component SMF Collect info concerning:  Billing users  Reporting reliability  Analyzing the configuration  Scheduling jobs  Summarizing direct access volume activity  Evaluating data set activity  Profiling system resource use  Maintaining system security

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 8 Workload management WLM retains the following data:  CPU time used  Memory used + pages/sec  I/Os done + I/O rate  Transaction rate  Goal achievement

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 9 WLM RMF report

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 10 Performance management Performance management is a key discipline in the systems management area. It includes measuring, analyzing, reporting, and tuning the performance of IT resources. Two categories:  Real-time monitoring, alerting, problem identification, and problem resolution.  Bench marking, modeling, rerunning problem scenarios, and trending performance metrics feeding capacity planning.

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 11 Performance management Objectives:  Optimize response time and throughput of IT resources  Take corrective actions to alerts and problem requests

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 12 Performance management : z/OS implementation Resource Measurement Facility (RMF):  Batch monitoring  CPU  Storage  Workload  I/O Activity  Other  Online monitoring  Delay monitoring

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 13 Configuration management In a large-scale commercial system, the number of hardware devices, system software items (compiled modules, source modules, data items, etc.), and application software items has been large since the first days of the mainframe.

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 14 System Software configuration management SMP/E characteristics:  Large number of components.  Great packing flexibility.  A backward compatibility need.  Different software developers and vendors.  Long-supported versions.

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 15 System Software configuration management 4 types of SYSMODs:  PTF  APAR  FUNCTION  USERMOD

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 16 Hardware configuration management Hardware Configuration Definition (HCD) becomes useful after:  It is written in a system file.  Must be split between the hardware and the software.  Has to be tested.  Has to be activated sysplex-wide

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 17 Application configuration management Application configuration management is a discipline that is common to any platform. On a IBM System z platform these tools must be able to manage Java (WebSphere Application Server) as well as COBOL applications. IBM’s tool is named Software Configuration and Library Manager (SCLM).

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 18 Operations management Operations in a large-scale commercial operating system is crucial for performance and availability. Operations means 2 related activities:  Batch scheduling  Console operations

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 19 Problem management Problem management is a discipline that can be viewed from various angles:  How problems are solved  How problems are reported  How problems are tracked What is system managed:  Trend reporting  Master console

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 20 Network management z/OS participates as any other node on the network and complies to the standards in this area (SNMP communication, for instance). On such networks, the z/OS network management subsystem usually acts as the focal point.

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 21 Storage management In z/OS the software that manages the external storage devices is called DFSMS.

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 22 Security management IBM System z TIVOLI SecureWay Directory INTERNET Users FireWall LPAR DMZ Internet LPAR LPAR PolicyManager INTRANET IntrusionDetectionSystem WebSeal BtB Users IDS... Policy Director Manage r Switch WebSeal Production LPAR WebSeal Switch FireWall LegendFireWall Web Services VPN

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 23 Change management Change management is a discipline that is meant for the whole infrastructure. z/OS does to manage changes applied to software through SMP/E asking for prerequisites and logging changes.

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 24 Summary  9 system management disciplines  Service Level management is not covered  Security management is special  Tools are available  Pay attention to all the system components !

Introduction to the new mainframe © Copyright IBM Corp., All rights reserved. 25 Key terms in this chapter APAR Change management Configuration management FUNCTION HCD Network management Operations management Problem management PTF RMF Security management SMP/E Storage management System management System Data USERMOD Workload management