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4-8 Prepare: Writing a Plan and Getting Ready to Migrate
Write a Migration Plan Adaptive Server Enterprise 11.5
Write a Migration Plan
Produce a project plan which documents:
• Migration strategy—Which method is most appropriate for your
site.
• Fallback—What to do in case the migration fails. The plan you
evolve will be site-specific, but some general issues are discussed
in Chapter 7, “Test: Ensuring Stability and Performance”.
• Application test suite—What validation and performance testing
to perform for acceptance. See Chapter 7, “Test: Ensuring
Stability and Performance” for guidance.
• Bridging—Ways to minimize the impact to users during the
migration. Refer to the business requirements you gathered in
Chapter 3, “Analyze: Documenting Your Environment”.
• Environment—Additional resources and changes to the
environment needed based on the information you gathered in
Chapter 3, “Analyze: Documenting Your Environment”.
• Scheduling—How much time the migration will take based on
the level of complexity and business needs. Refer to the business
Environment Be sure to account for any increased release 11.x memory requirements that
apply to your configuration. For more information, see:
• The installation guide for your platform. It gives basic RAM requirements.
• Chapter 6, “Implement: Making Required Database Administration
Changes”.
• Details on configuring memory and data caches in the System Administration
Guide
• Information on how to configure memory for performance in the Performance
and Tuning Guide.
Here are some additional tips:
• Execute performance measurements on a system with similar capabilities.
• For a production system, execute the performance suite during off hours.
Scheduling For a development system, you may want to add a short period to the
development schedule for release 11.x issues.
For a production system, be prepared to postpone or back off if needed.
Table 4-4: Phased cutover migration (continued)
Issue Recommendations and Tips
- Migrating to Sybase® 1
- Table of Contents 5
- A. The Cyrano Migration Pack 9
- E. Migration Plan Checklist 12
- List of Tables 13
- Introduction and Guide to 15
- Resources 1 15
- Chapter Title Contents 16
- Technical Information Library 18
- Migration Web Page 19
- Migration Courses 19
- Sybase Press Books 20
- Third-Party Books 20
- Consulting Services 20
- Third-Party Tools 21
- If You Need Help 21
- Analyze: Documenting Business 23
- Requirements 2 23
- Acme Brokerage Company 24
- System Architecture 24
- Availability Requirements 25
- Database Change Metrics 25
- Maintenance Procedures 26
- Service Level Requirements 27
- Current Performance Metrics 28
- • Vendor issues 30
- Analyze: Documenting Your 31
- Environment 3 31
- CPU Resources per Machine 32
- Disk Configuration 32
- Network Configuration 34
- Tape Configuration 34
- Physical Memory Utilization 35
- Software Configuration 36
- Sybase Configuration 37
- SQL Server Objects 40
- If You Don’t Have Scripts 41
- Ready to Migrate 4 43
- Parallel With Replication 45
- Cutover Without Replication 47
- Phased Cutover 49
- Write a Migration Plan 50
- Update Hardware Resources 51
- Create Migration Scripts 52
- Implement: Making Required 55
- Application Changes 5 55
- Datatype Changes 57
- Table 5-3: Datatype hierarchy 59
- Name Hierarchy 59
- Subquery Processing Changes 62
- NULL Algodata Infosystems 64
- NULL New Age Books 67
- Binnet & Hardley 67
- Algodata Infosystems 67
- 250 no rows returned 68
- Enterprise 11.5 73
- Login and Password Changes 82
- RUN File Renamed 83
- New create table Permission 84
- New Backup Server 85
- Last Chance Threshold 85
- Reference Supplement 86
- Configuration Interface 88
- Old Name New Name 89
- Databases Online / Offline 90
- Increased Memory Requirements 92
- Figure 6-1: Areas of memory 93
- 4.x 125% 96
- 10.x 50% 96
- 11.0.x 25% 96
- Optional Space Considerations 98
- Test: Ensuring Stability and 101
- Performance 7 101
- Make Backups 102
- Summary of Testing Techniques 104
- • Production load capture 105
- Writing Performance Scripts 106
- Test Cycle: Summary of Tests 109
- Stage Purpose Best Technique 110
- Pre-Upgrade Single-User Tests 111
- Pre-Upgrade Multi-User Tests 111
- Test System Upgrade 112
- Post-Upgrade Multi-User Tests 113
- The Cyrano Migration Pack A 115
- For More Information 117
- A-4 The Cyrano Migration Pack 118
- Worksheets for Your Current 119
- Environment B 119
- Backup and Restore Procedures 121
- Database Dump Details 122
- Data Architecture Worksheet 124
- Transaction Profile 126
- Host Configuration 127
- Record CPU resources: 128
- Physical Memory Usage 129
- Operating System Configuration 134
- Detail the operating system 134
- SQL Server Configuration 135
- Table B-18: dbcc output 136
- Usage MB 2K Pages Bytes 136
- Database Devices 137
- Databases and Segments 138
- Dump Devices 139
- Migration Approach Outline 141
- In This Appendix 145
- Sample Task List Template 145
- Migration Analysis 146
- Migration Preparation 147
- Migration Quality Assurance 151
- Set Up Replication Server 154
- Run Regression Test Suites 154
- Perform Final Steps 156
- Staged Cutover Task Overview 161
- Migration Plan Checklist E 163
- Logical Support Architecture 165
- Migration Strategy Design 165
- E-4 Migration Plan Checklist 166
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