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DB2 for z/OS Architecture in Nutshell
The document presents a seminar on DB2 for z/OS held by Cüneyt Göksu, an expert with over 20 years in information management technologies. It covers the mainframe architecture, features of DB2 as a relational database management system, and discusses its capabilities like concurrency, security, and data sharing. The seminar highlights the importance of DB2 in maintaining mission-critical applications while supporting modern technology trends.
In this document
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Overview of the CENG497 seminar and speaker credentials. Cüneyt Göksu's background in information management and contributions to DB2.
Highlights the role of IBM mainframes and z/OS in data management. Introduces DB2 for z/OS as a trusted RDBMS since 1983, focusing on its data handling capabilities.
Discusses risks of database failures, DB2's structure and utilities like COPY/RECOVER, emphasizing recovery and data integrity.
Explains data integrity and concurrency in DB2 using the EMPLOYEE table example, emphasizing lock types and processes.
Describes roles in DB2 security administration and the importance of maintaining secure access across various DB2 interfaces.
Focuses on the capabilities of DB2's distributed data facility such as location transparency and scalability.
Describes advantages of DB2 data sharing, including improved availability and dynamic workload balancing.
Wraps up the seminar, providing an opportunity for questions and offering speaker contact information.
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DB2 for z/OS Architecture in Nutshell
- 1. CENG497 - DB2for z/OS Seminar – May 26th 2011 – Middle East Technical University, Ankara DB2 for z/OS Architecture in Nutshell Cüneyt Göksu DB2 SME, Information Champion, IBM Gold Consultant 1
- 2. Who am I? BS, Computer Science, YTU, Istanbul, 1990 MBA, Marmara University, Istanbul, 1992 MS in CS, IIT, Chicago, 1994 20+ years in “Information Management” Technologies 1996 IDUG (International DB2 Users Group) 2004 TDUG (Turkish DB2 Users Group) 2008-2010 IBM Data Champion 2009 IBM Gold Consultant 2011 IDUG BOD 2
- 3. Mainframe – LegendNever Ends •1964: IBM® System/360™ •Obsolete? New trend? •Trusted for mission-critical data •Capability to maintain both old and new applications •SOA (Service-Oriented Architecture) enabled •z/OS – Most widely used mainframe operating system •DB2 for z/OS – IBM’s mainframe relational database management system – Since 1983! 3
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- 7. What is DB2for z/OS? • Relational Data Base Management System (RDBMS) – Data base consists of tables • Simple concepts • Dynamic relationships – Structured query language (SQL) • High level – Data Manipulation Language (DML) – Data Definition Language (DDL) – Data Control Language (DCL) • User specifies WHAT not HOW – RDBMS facilities • Integrity • Dynamic definition of DB2 objects • Active catalog • Recovery / restart • Continuous operations • Security • Interactive tools 7
- 8. The system’s view • Distributed Utility Applications Utility WebSphere TSO BATCH DB2 CICS IMS Application Server Trxb Trxa Prog2 Appl2 Appl1 Trx2 Prog1 Trx1 • DB2 receives MANY requests from MANY user programs to access potentially the SAME data • Besides USER PROGRAMS, DB2 also receives requests from UTILITIES 8
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- 50. The Risks ofDatabase Failures 50
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- 58. COPY/RECOVER utilities RECOVER UPDATE UPDATE DELETE Log Time COPY DISK CRASH IMAGE COPY 58
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- 77. Data integrity andconcurrency EMPLOYEE Table Prog1 Prog2 1 EXCLUSIVE Row LOCK UPDATE STOP ... WAIT ... 2 RELEASE .. LOCK SELECT . OK 3 SHARED LOCK COMMIT 4 DB2 must maintain data integrity and also provide maximum concurrency 77
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- 88. DB2 Security 88
- 89. Roles and interfacesin DB2 Security Administrator Operations System Data Administration Administrator Capacity Functional Technical Planner Designer Designer z/OS Database Sysprog Administrator Programmer CICS/IMS Sysprog TP Specialist 89
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- 95. Location transparency, Scalability,Phased growth, Portability of application 95
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- 108. DB2 for z/OSdata sharing z/OS z/OS z/OS DB2 DB2 DB2 z/OS z/OS DB2 SHARED DB2 DASD z/OS z/OS z/OS DB2 DB2 DB2 • Improved availability • Incremental processing growth • Huge queries feasible • Configuration flexibility • SYSPLEX hardware required • Dynamic workload balancing • Single shared catalog 108
- 109. CENG497 - DB2for z/OS Seminar – May 26th 2011 – Middle East Technical University, Ankara Q&A Cüneyt Göksu DB2 SME, Information Champion, IBM Gold Consultant Cuneyt.Goksu@Gmail.com 109