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Front cover
z/VSE Using DB2 on
Linux for System z
Helmut Hellner
Ingo Franzki
Martin Kammerer
Roopa Mahendra
Wilhelm Mild
See the advantages for z/VSE
applications using DB2 on Linux
Plan a migration of DB2 data to
Linux for System z
Use a sample scenario for
your implementation

International Technical Support Organization
z/VSE Using DB2 on Linux for System z
February 2010
SG24-7690-00

© Copyright International Business Machines Corporation 2010. All rights reserved.
Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule
Contract with IBM Corp.
First Edition (February 2010)
This edition applies to Version 7, Release 5, Modification 0 of IBM DB2 Server for VSE & VM (product number
5697-F42) and DB2 9.7 for Linux, UNIX, and Windows, Enterprise Server Edition (product number 5765-F41).
Note: Before using this information and the product it supports, read the information in “Notices” on
page vii.

© Copyright IBM Corp. 2010. All rights reserved. iii
Contents
Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
The team who wrote this book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Become a published author . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .x
Comments welcome. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Chapter 1. Overview of a future oriented DB2 environment . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Business values of using DB2 for Linux on System z . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 z/VSE benefits of using DB2 for Linux on System z . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Architectural options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.1 Logical data integration with IBM InfoSphere Federation Server . . . . . . . . . . . . . . 5
1.3.2 Physical data integration on DB2 for Linux on System z . . . . . . . . . . . . . . . . . . . . 6
1.4 Considerations for a rehosting project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4.1 Overview of the steps for a rehosting project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4.2 Skills required in a rehosting project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.4.3 Required documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 2. Planning DB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 Hardware options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1.1 Virtualization options with LPAR and z/VM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1.2 IBM System Storage disk considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2 DB2 in z/VSE and z/VM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.2.1 Considerations for DB2 in a z/VSE environment . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.2.2 CPU planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.2.3 Memory sizing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.2.4 I/O dependency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.2.5 Workload behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.2.6 Outbound database connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.3 Linux considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.3.1 Kernel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.3.2 File system I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.3.3 I/O processing for disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.3.4 I/O scheduling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.3.5 I/O options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.3.6 Logical volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.3.7 Storage pool striping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.3.8 DB2 container striping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2.3.9 Summary of considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.4 Network planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.4.1 Throughput measurements for different network connection types . . . . . . . . . . . 31
2.5 Database considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
2.5.1 Database type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
2.5.2 ASCII and EBCDIC considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Chapter 3. Setting up and customizing the environment . . . . . . . . . . . . . . . . . . . . . . . 39
3.1 General environment considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.2 Setting up the DB2 enterprise server for Linux on System z . . . . . . . . . . . . . . . . . . . . 42

iv z/VSE Using DB2 on Linux for System z
3.2.1 Installing DB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.2.2 Configuring DB2 for Linux on System z as a server . . . . . . . . . . . . . . . . . . . . . . . 51
3.2.3 Configuring DB2 for Linux on System z for access to remote databases. . . . . . . 52
3.2.4 Defining the rehosting database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
3.3 Setting up a federated database environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
3.3.1 Setting up a federated database. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3.4 Setting up the network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
3.4.1 An overview of HiperSockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3.4.2 Configuring the z/VSE network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3.4.3 Configuring the Linux network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
3.4.4 HiperSockets specifics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
3.4.5 Network specifics in Linux distributions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
3.5 Setting up DB2 Server for VSE Client Edition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
3.5.1 Preparing z/VSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
3.5.2 Preparing the CICS system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
3.5.3 Preparing DB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
3.5.4 Installing DB2 Server for VSE Client Edition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
3.5.5 Verifying the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
3.5.6 Considerations for an implicit connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
3.5.7 Connection pooling in an online resource adapter . . . . . . . . . . . . . . . . . . . . . . . . 95
3.6 DB2 Server for VSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
3.6.1 Preparing the application server to use TCP/IP . . . . . . . . . . . . . . . . . . . . . . . . . . 96
3.6.2 Preparing the application requester to use TCP/IP. . . . . . . . . . . . . . . . . . . . . . . . 98
3.6.3 Enabling DRDA for DB2 Server for VSE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
3.6.4 DB2 block size considerations in z/VSE and z/VM . . . . . . . . . . . . . . . . . . . . . . . . 98
3.7 DB2 Server for VM Client Edition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
3.7.1 Setting up the communication directory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
3.8 DB2 Server for VM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
3.8.1 Preparing the application server to use TCP/IP . . . . . . . . . . . . . . . . . . . . . . . . . 100
3.8.2 Preparing the application requester to use TCP/IP. . . . . . . . . . . . . . . . . . . . . . . 102
3.9 DRDA interfaces in z/VSE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
3.9.1 DB2 Server for VSE & VM interface considerations . . . . . . . . . . . . . . . . . . . . . . 102
3.9.2 PROTOCOL parameter considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Chapter 4. DB2 data migration and application dependencies . . . . . . . . . . . . . . . . . 105
4.1 Data migration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
4.1.1 Prerequisites for data migration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
4.1.2 Migrating data from DB2 Server for VSE & VM . . . . . . . . . . . . . . . . . . . . . . . . . 107
4.2 Migrating the database access packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
4.2.1 Creating access packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
4.2.2 Creating a package by using CBND and batch binding . . . . . . . . . . . . . . . . . . . 112
4.2.3 Binding online applications using CBND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
4.2.4 Binding batch applications by using the batch binder . . . . . . . . . . . . . . . . . . . . . 113
4.2.5 Package loading and rebinding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
4.3 Application considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
4.3.1 Implicit connect setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
4.3.2 Connection pooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
4.3.3 Fetch and insert blocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
4.3.4 Compatibility of DB2 VSE with DB2 for Linux, UNIX, and Windows. . . . . . . . . . 117
4.3.5 Transferring database object permissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
4.4 Moving to production. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Chapter 5. Monitoring and tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Contents v
5.1 Best practice activities for monitoring and tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
5.2 Performance activities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
5.2.1 Collecting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
5.2.2 Analyzing the data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
5.2.3 Tuning the systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
5.2.4 Running the test case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
5.3 Linux system monitoring and tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
5.3.1 Monitoring with sysstat utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
5.3.2 Disk monitoring with the iostat utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
5.3.3 Disk statistics monitoring with the dasd statistics utility . . . . . . . . . . . . . . . . . . . 129
5.3.4 SCSI disk statistics for the FCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
5.3.5 Linux process monitoring with the top utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
5.3.6 Monitoring with the oprofile utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
5.3.7 Linux on System z system check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
5.3.8 Additional tools for Linux and z/VM monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . 134
5.4 DB2 for Linux on System z monitoring and tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
5.4.1 DB2 Design Advisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
5.4.2 DB2 Workload Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
5.4.3 SQL and XQuery Explain facility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
5.4.4 Snapshot monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
5.4.5 DRDA tracing of activity with DB2 for Linux . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
5.4.6 Additional DB2 monitoring tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
5.5 Network monitoring and tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
5.5.1 Network trace in z/VSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
5.5.2 Network activity in Linux on System z. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
5.5.3 HiperSockets considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
5.5.4 DB2 BLOCK SIZE considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
5.6 z/VSE system monitoring and tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
5.6.1 z/VSE system monitoring facilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
5.6.2 Stand-alone monitor tools and products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
5.6.3 CPU considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
5.6.4 Memory analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
5.6.5 I/O considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
5.6.6 z/VM and LPAR considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
5.7 DB2 Server for VSE & VM monitoring and tuning. . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
5.7.1 Operating system tools for monitoring database workload behavior . . . . . . . . . 161
5.7.2 DB2 Server for VSE & VM tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
5.8 Monitoring z/VSE applications and tuning recommendations . . . . . . . . . . . . . . . . . . . 163
5.8.1 Monitoring connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
5.8.2 Authentication considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
5.8.3 Batch application monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
5.8.4 CICS application monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
5.8.5 SQL query tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
5.8.6 DB2 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
5.8.7 Best practices for designing high-performance DB2 applications. . . . . . . . . . . . 166
5.8.8 Tuning considerations for migrated VSAM applications . . . . . . . . . . . . . . . . . . . 167
Appendix A. Configuration examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
The IPINIT00.L TCP/IP configuration member in z/VSE . . . . . . . . . . . . . . . . . . . . . . . . . . 170
File definitions in CICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
The ARISIVRR.Z parameter file for the DB2 setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Appendix B. Database manipulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

vi z/VSE Using DB2 on Linux for System z
The db_udcs.c program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
The sqle819a.h header file. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
The crtnick.sqc C program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Related publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
IBM Redbooks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Other publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Online resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
How to get Redbooks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Help from IBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
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© Copyright IBM Corp. 2010. All rights reserved. vii
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viii z/VSE Using DB2 on Linux for System z
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Architecture™
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Other company, product, or service names may be trademarks or service marks of others.

© Copyright IBM Corp. 2010. All rights reserved. ix
Preface
Data is one the most critical and valuable assets of a business. Critical strategic decisions
can be made more quickly and effectively when they are based on complete, accurate, and
timely operational data. From this point of view, it is important to have an enterprise data
management architecture that supports a flexible global view of the business. A global view
helps enable decisions that quickly reflect current conditions and anticipate future
requirements. Faster, better informed decisions can help drive substantive changes that
enhance value.
Many environments today are heterogeneous with a high quantity and diversity of data. In this
IBM® Redbooks® publication, we help enterprise architects and IT managers with these
environments make decisions for a centralized database or data warehouse. We recommend
a centralized data management environment on Linux® on System z®. We include guidance
for IBM z/VSE™ and Linux specialists to reorganize existing IBM DB2® VSE data and build a
database environment with continuous operation in Linux on System z.
We begin this book by describing the possibilities and advantages of enterprise data
management and different technical ways to realize it. Then we discuss planning, which is
important for setting the foundation of the architecture that is implemented. We explain the
hardware considerations for capacity and performance planning. For the z/VSE system and
Linux on System z, we describe considerations for operation in a logical partition (LPAR) and
in a virtualized environment with IBM z/VM®. In addition, we discuss the disk behavior for
different workloads, storage dependencies, network connections, and DB2 database
considerations.
We also guide you in customizing the DB2 server for z/VSE, z/VM, and DB2 on Linux to allow
existing z/VSE and z/VM applications to access the database on Linux on System z. We