IBM GDPS Active/Active Overview and Planning

120 Pages·2015·2.16 MB·English

Front cover
IBM GDPS Active/
Active Overview and
Planning
GDPS Active/Active architectural
overview
Hints and tips for GDPS Active/
Active deployment
Planning for GDPS
Active/Active
Lydia Parziale
Juliet Candee
Jiong Fan
Paulo Shimizu
Sidney Varoni Jr
Shu Xie
ibm.com/redbooks

International Technical Support Organization
IBM GDPS Active/Active Overview and Planning
March 2015
SG24-8241-00
Note: Before using this information and the product it supports, read the information in “Notices” on
pagevii.
First Edition (March 2015)
This edition applies to Version 1, Release 4, of GDPS Active/Active.
© Copyright International Business Machines Corporation 2015. All rights reserved.
Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule
Contract with IBM Corp.
Contents
Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vii
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
IBM Redbooks promotions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Authors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Now you can become a published author, too! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Comments welcome. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Stay connected to IBM Redbooks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 GDPS Active/Active solution concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1.1 Evolution of GDPS Active/Active solution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1.2 GDPS Active/Active solution concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Benefits of using GDPS Active/Active. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.2.1 Reduce planned and unplanned outages for critical applications. . . . . . . . . . . . . 10
1.2.2 Isolation from catastrophic failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.2.3 Both sites running workloads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 2. Architectural overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 Components of GDPS Active/Active. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2 GDPS Active/Active product. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.1 Active/Active sites concept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.2 Active/Active site configuration options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.3 GDPS Active/Active Workload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.4 GDPS Active/Active product. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.2.5 GDPS environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.2.6 Graceful switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.3 Multi-Site Workload Lifeline for z/OS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.4 Software data replication products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.5 IBM Tivoli Monitoring and IBM Tivoli NetView for z/OS . . . . . . . . . . . . . . . . . . . . . . . . 20
2.5.1 IBM Tivoli Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.5.2 IBM Tivoli NetView for z/OS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Chapter 3. GDPS and data replication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.1 Data replication overview using software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.2 IBM InfoSphere Data Replication for DB2 in GDPS Active/Active . . . . . . . . . . . . . . . . 24
3.2.1 How does IIDR for DB2 work? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.2.2 IIDR for DB2 architectural overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.2.3 IIDR for DB2 and GDPS Active/Active . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.3 IBM InfoSphere Data Replication for VSAM in GDPS/AA. . . . . . . . . . . . . . . . . . . . . . . 30
3.3.1 How does IIDR for VSAM work?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.3.2 IIDR for VSAM architectural overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.3.3 IIDR for VSAM and GDPS/AA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.4 Minimizing latency (and RPO) and improving replication performance by using
parallel apply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.4 IBM InfoSphere Data Replication for IMS in GDPS/AA . . . . . . . . . . . . . . . . . . . . . . . . 35
3.4.1 How does IIDR for IMS work?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
© Copyright IBM Corp. 2015. All rights reserved. iii
3.4.2 IIDR for IMS Architectural Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.4.3 IIDR for IMS and GDPS/AA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.4.4 Minimizing latency (and RPO) and improving replication performance by using
Parallel apply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Chapter 4. Workload distribution and balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.1 Key concepts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.2 Multi-site Workload Lifeline Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.2.1 Lifeline Advisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.2.2 Lifeline Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.2.3 Lifeline communication route . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.3 Interaction with other components within GDPS Active/Active. . . . . . . . . . . . . . . . . . . 44
4.3.1 Lifeline recommendation on workload distribution . . . . . . . . . . . . . . . . . . . . . . . . 45
4.3.2 Lifeline in graceful switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
4.3.3 Failure detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Chapter 5. Controlling and monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.2 Prerequisite software for controlling and monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.3 IBM Tivoli Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.3.1 Overview of IBM Tivoli Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.3.2 Components of the monitoring architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.3.3 IBM Tivoli Monitoring components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.3.4 IBM Tivoli Monitoring operational considerations . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.4 IBM Tivoli System Automation for z/OS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.5 IBM Multi-site Workload Lifeline for z/OS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.6 Middleware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.6.1 Application Middleware for IBM GDPS Active/Active . . . . . . . . . . . . . . . . . . . . . . 55
5.7 IBM GDPS Active/Active monitor processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
5.8 IBM GDPS Active/Active Monitor processing during a workload or site failure. . . . . . . 56
5.9 IBM Tivoli NetView for z/OS and IBM Tivoli NetView Monitoring for GDPS . . . . . . . . . 57
5.9.1 IBM NetView Agent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
5.9.2 IBM GDPS Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
5.10 IBM OMEGAMON XE Family . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
5.10.1 Tivoli OMEGAMON XE on z/OS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
5.11 IBM GDPS Active/Active web interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
5.11.1 Controllers windows and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
5.11.2 GDPS Standard Actions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
5.11.3 Sites windows and functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
5.11.4 Workload Management windows and functions . . . . . . . . . . . . . . . . . . . . . . . . . 63
5.11.5 Planned Actions windows and functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
5.11.6 Launching Tivoli Enterprise Portal from the GDPS web interface. . . . . . . . . . . . 66
5.11.7 Other web interface options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
5.11.8 GDPS Active/Active monitoring and alerting. . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Chapter 6. Planning considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
6.1 Prerequisites for each component . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
6.1.1 Hardware prerequisites and corequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
6.1.2 Software prerequisites and corequisites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
6.1.3 Server/Application State Protocol (SASP)-compliant routing . . . . . . . . . . . . . . . . 74
6.1.4 Network Connectivity and bandwidth considerations . . . . . . . . . . . . . . . . . . . . . . 74
6.1.5 NetView Web Application requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
6.1.6 Base Control Program internal interface (BCPii) considerations . . . . . . . . . . . . . 75
6.1.7 Software replication considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
iv IBM GDPS Active/Active Overview and Planning
6.1.8 Sysplex configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
6.2 Decision Point. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.2.1 Business decision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.2.2 Identify the workload. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.2.3 Active/Standby or Active/Query Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
6.2.4 Single consistency groups or multiple?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
6.2.5 Disaster recovery (DR) solution option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
6.3 Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
6.3.1 Study the outage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.3.2 Identify GDPS Active/Active workloads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.3.3 Plan software data replication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
6.3.4 Decide on an Active/Standby or Active/Query configuration. . . . . . . . . . . . . . . . . 82
6.3.5 Plan the workload distribution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
6.3.6 Integrate with current disaster recovery plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
6.3.7 Plan the monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
6.3.8 Other considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
6.3.9 Plan GDPS Active/Active use cases. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
6.3.10 Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
6.3.11 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
6.3.12 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
6.3.13 Production. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
6.3.14 Tuning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
6.4 Hints and Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
6.4.1 Software data replication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
6.4.2 Workload distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
6.4.3 GDPS Active/Active site switch of workloads . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Chapter 7. Other Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
7.1 Application considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
7.1.1 Online workload consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
7.1.2 Batch optimization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
7.2 Storage-based replication considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
7.2.1 GDPS Active/Active co-operation with GDPS/PPRC . . . . . . . . . . . . . . . . . . . . . . 92
7.2.2 GDPS Active/Active integration with GDPS/MGM . . . . . . . . . . . . . . . . . . . . . . . . 93
7.3 Handling batch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
7.3.1 Batch workload. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
7.3.2 Challenges of the batch workload to GDPS Active/Active . . . . . . . . . . . . . . . . . . 95
7.3.3 Solution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Appendix A. IBM Global Technology Services and GDPS service offering . . . . . . . . 97
What is IBM Global Technology Services? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
What are GDPS service offerings and how do they address business requirements? . . . . 98
Technical Consulting Workshop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
IBM Installation Services for GDPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
GDPS Offerings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
How do I contact IBM for GDPS services? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Related publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
IBM Redbooks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Other publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Online resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Help from IBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Contents v
vi IBM GDPS Active/Active Overview and Planning
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