DB2 for z/OS Architecture in Nutshell
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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.
DB2 for z/OS Architecture in Nutshell
- 1. CENG497 - DB2 for 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 – Legend Never 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 DB2 for 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 of Database 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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- 61. DB2 Data Structures 61
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- 76. DB2 Concurrency Control 76
- 77. Data integrity and concurrency 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 interfaces in 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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- 94. Distributed Data Facility 94
- 95. Location transparency, Scalability, Phased growth, Portability of application 95
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- 108. DB2 for z/OS data 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 - DB2 for z/OS Seminar – May 26th 2011 – Middle East Technical University, Ankara Q&A Cüneyt Göksu DB2 SME, Information Champion, IBM Gold Consultant [email protected] 109