Introduction to the new mainframe LargeScale Commercial Computing

Introduction to the new mainframe: Large-Scale Commercial Computing Chapter 7: Systems Management © Copyright IBM Corp. , 2006. All rights reserved.

Introduction to the new mainframe 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 © Copyright IBM Corp. , 2006. All rights reserved. 2

Introduction to the new mainframe 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. ” © Copyright IBM Corp. , 2006. All rights reserved. 3

Introduction to the new mainframe Introduction to systems management Ø Ø Ø Ø Ø Performance management Workload management Configuration management Operations management Problem management Network management Storage management Security management Change management © Copyright IBM Corp. , 2006. All rights reserved. 4

Introduction to the new mainframe System Data Ø Accounting Ø Reporting • Performance • Errors © Copyright IBM Corp. , 2006. All rights reserved. 5

Introduction to the new mainframe Data Collection in z/OS © Copyright IBM Corp. , 2006. All rights reserved. 6

Introduction to the new mainframe Z/OS component SMF Collect info concerning: Ø Ø Ø Ø 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 © Copyright IBM Corp. , 2006. All rights reserved. 7

Introduction to the new mainframe Workload management WLM retains the following data: Ø CPU time used Ø Memory used + pages/sec Ø I/Os done + I/O rate Ø Transaction rate Ø Goal achievement © Copyright IBM Corp. , 2006. All rights reserved. 8

Introduction to the new mainframe WLM RMF report © Copyright IBM Corp. , 2006. All rights reserved. 9

Introduction to the new mainframe 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: Ø Real-time monitoring, alerting, problem identification, and problem resolution. Ø Bench marking, modeling, rerunning problem scenarios, and trending performance metrics feeding capacity planning. © Copyright IBM Corp. , 2006. All rights reserved. 10

Introduction to the new mainframe Performance management Objectives: Ø Optimize response time and throughput of IT resources Ø Take corrective actions to alerts and problem requests © Copyright IBM Corp. , 2006. All rights reserved. 11

Introduction to the new mainframe Performance management : z/OS implementation Resource Measurement Facility (RMF): Ø Batch monitoring Ø CPU Ø Storage Ø Workload Ø I/O Activity Ø Other Ø Online monitoring Ø Delay monitoring © Copyright IBM Corp. , 2006. All rights reserved. 12

Introduction to the new mainframe 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. © Copyright IBM Corp. , 2006. All rights reserved. 13

Introduction to the new mainframe System Software configuration management SMP/E characteristics: Ø Large number of components. Ø Great packing flexibility. Ø A backward compatibility need. Ø Different software developers and vendors. Ø Long-supported versions. © Copyright IBM Corp. , 2006. All rights reserved. 14

Introduction to the new mainframe System Software configuration management 4 types of SYSMODs: Ø PTF Ø APAR Ø FUNCTION Ø USERMOD © Copyright IBM Corp. , 2006. All rights reserved. 15

Introduction to the new mainframe Hardware configuration management Hardware Configuration Definition (HCD) becomes useful after: Ø It is written in a system file. Ø Must be split between the hardware and the software. Ø Has to be tested. Ø Has to be activated sysplex-wide © Copyright IBM Corp. , 2006. All rights reserved. 16

Introduction to the new mainframe 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 (Web. Sphere Application Server) as well as COBOL applications. IBM’s tool is named Software Configuration and Library Manager (SCLM). © Copyright IBM Corp. , 2006. All rights reserved. 17

Introduction to the new mainframe Operations management Operations in a large-scale commercial operating system is crucial for performance and availability. Operations means 2 related activities: Ø Batch scheduling Ø Console operations © Copyright IBM Corp. , 2006. All rights reserved. 18

Introduction to the new mainframe 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: Ø Trend reporting Ø Master console © Copyright IBM Corp. , 2006. All rights reserved. 19

Introduction to the new mainframe 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. © Copyright IBM Corp. , 2006. All rights reserved. 20

Introduction to the new mainframe Storage management In z/OS the software that manages the external storage devices is called DFSMS. © Copyright IBM Corp. , 2006. All rights reserved. 21

Introduction to the new mainframe Security management Legend Intrusion Detection System Bt. B Users Policy Manager INTERNET Policy Director Manage r Web. Seal TIVOLI Secure. Way Directory Switch INTRANET Web. Seal Switch . . . IDS LPAR DMZ Internet IBM System z Fire. Wall LPAR DMZ Internet Fire. Wall Web Services Users Production LPAR VPN © Copyright IBM Corp. , 2006. All rights reserved. 22

Introduction to the new mainframe 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. © Copyright IBM Corp. , 2006. All rights reserved. 23

Introduction to the new mainframe Summary Ø Ø Ø 9 system management disciplines Service Level management is not covered Security management is special Tools are available Pay attention to all the system components ! © Copyright IBM Corp. , 2006. All rights reserved. 24

Introduction to the new mainframe 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 Data USERMOD Workload management © Copyright IBM Corp. , 2006. All rights reserved. 25