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Working with Portal Server Building Modules
96 Portal Server 6 2005Q1 • Deployment Planning Guide
Transparent Failover
Transparent failover uses the same replication model as the NSPOF scenario but
provides additional high availability features, which make the failover to a backup
server transparent to end users.
Figure 5-5 on page 96 shows a transparent failover scenario. Two building modules
are shown, consisting of four CPUs by eight GB RAM. Load balancing is
responsible for detecting Portal Server failures and redirecting users’ requests to a
backup Portal Server in the building module. Building Module 1 stores sessions in
the sessions repository. If a crash occurs, the application server retrieves sessions
created by Building Module 1 from the sessions repository.
Figure 5-5 Transparent Failover Example Scenario
Load
Balancer
Browser
Portal
Server
Directory
Server
Master
Replica
Multi-Master
Replication
Instance
Building Module 2
Sessions
Repository
SSe
Se
s
Search
Engine
Database
Portal
Server
Directory
Server
Master
Replica
Instance
Building Module 1
SSe
Se
s
Search
Engine
Database
- Portal Server 6 1
- Deployment Planning Guide 1
- Contents 3
- Contents 5 5
- Contents 7 7
- List of Figures 9
- List of Tables 11
- Before You Read This Book 13
- Who Should Read This Book 13
- How This Book Is Organized 14
- Conventions Used in This Book 15
- Related Documentation 16
- Other Server Documentation 17
- Sun Welcomes Your Comments 19
- Portal Server Architecture 21
- Types of Portals 22
- Portal Server Capabilities 23
- Sun Java System Portal Server 24
- Secure Remote Access 25
- Portal Server in Secure Mode 26
- Applications 27
- Identity Management 30
- Software Packaging 31
- Software Categories 31
- Figure 1-4 SRA Deployment 35
- Architecture 37
- Proxy Configuration 39
- Gateway and SSL Support 39
- Gateway Access Control 40
- Gateway Logging 41
- Split Tunneling 43
- Netlet Proxy 44
- Initialization 45
- Validating Credentials 45
- Access Control 46
- Security 46
- Special Operations 46
- Rewriter Proxy 48
- Business Objectives 51
- Technical Goals 53
- Search Engine 57
- Personalization 58
- Aggregation and Integration 58
- Pre-Deployment Considerations 61
- Portal Sizing Tips 62
- Portal Sizing 63
- Peak Numbers 64
- Concurrent Users 65
- Average Session Time 66
- Search Engine Factors 66
- Portal Desktop Configuration 67
- Hardware and Applications 68
- Back-End Servers 68
- Transaction Time 68
- Workload Conditions 69
- LDAP Transaction Numbers 70
- SRA Sizing 72
- Requirements 73
- Netlet Usage Characteristics 74
- Advanced Gateway Settings 75
- Scalability 76
- Creating Your Portal Design 79
- Portal Design Approach 80
- Logical Portal Architecture 81
- Portal Server and Scalability 83
- System Availability 85
- Degrees of High Availability 85
- Portal 86
- SMTP/IMAP 87
- Best Effort 92
- No Single Point of Failure 93
- Transparent Failover 96
- Building Module Constraints 97
- Directory Server Requirements 98
- Search Engine Structure 98
- Elements of Portal Use Cases 100
- Using Platform Security 103
- Limiting Access Control 104
- 3. Restart amserver services 110
- Basic SRA Configuration 112
- Disable Netlet 113
- Proxylet 114
- Multiple Gateway Instances 115
- Netlet and Rewriter Proxies 116
- Rewriter 117
- Netlet traffic 119
- HTTP traffic 119
- Using an Accelerator 120
- Netlet with 3rd Party Proxy 121
- Reverse Proxy 122
- Designing for Localization 123
- Integration Design 124
- Independent Software Vendors 125
- Implementing Single Sign-On 128
- Portal Desktop Design 128
- Working with Providers 129
- Client Support 131
- The Production Environment 133
- Documenting the Portal 134
- Monitoring Portal Server 135
- CPU Utilization 136
- Thread Usage 137
- Portal Usage Information 138
- Installed Product Layout 139
- Directories Installed for SRA 140
- Configuration Files 141
- Analysis Tools 143
- What to Look For 145
- Considerations 145
- What to look for 149
- Considerations: 149
- Consider the following: 149
- Tuning Parameters for 150
- /etc/system 150
- Table B-3 TCP/IP Options 151
- Portal Server 153
- /welcome.html 157
- XMLConfig 157
- Troubleshooting Your Portal 159
- Deployment 159
- Log Files 160
- Troubleshooting Portal Server 161
- Troubleshooting SRA 162
- Introduction to 163
- ./shooter.sh 164
- SRA Log Files 165
- Gateway-hostname 166
- Gateway-profile-name 166
- Portal Deployment Worksheets 167
- Table E-1 General Questions 168
- Portal Assessment Worksheets 169
- Portal Design Task List 171
- 2. Design 172
- Java System 173
- Sun Java System Portal 173
- 4. Deployment Production 176
- Limitations Using Linux 179
- Glossary 181
- Section B 184
- Section E 185
- Index 185 185
- Section H 186
- Section M 187
- Index 187 187
- Section O 188
- Section Q 189
- Index 189 189
- Section T 190
- Section W 191
- Index 191 191
- Section X 192
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